Open Source Ecology Open Source Microfactory STEAM Camp, 3 Mar 2020

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From YouTube: Raspberry Pi Tablet - Development Meeting

Description

Raspberry Pi Tablet - development meeting. See https://wiki.opensourceecology.org/wiki/Part_Library_for_the_Raspberry_Pi_Tablet

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A

B

Okay, let's dive right into it, see if anybody else joins us just to me baby, otherwise, so all right I was actually no no man. um A couple of resources. I want to show you, so one is the. As far as the camp understanding, wiring there's a thing: uh-huh, oh no, if you saw the page instructor exam, but in it there's a link to the wiring.

B

Let me see oh yeah. It's called a D 3 D universal troubleshooting guide. There we start with oh.

B

Yeah and then there's a link to the final 5-minute control panel test, so you should be able to go through this. But basically let me send that link and I think.

C

B

Know, Jeremy hi, so here's a link for you guys for wiring purposes so that you master the wiring. So I put it in the chat. Yeah awesome.

C

I'm gonna, try and wire out two more here from the other parts that I have here before yeah.

B

So essentially, that's like I. Pretty much list broke down like this is what I actually do when I test all the wiring? It's this big mess my test this and all of us should be pretty much readily able to take page one which is like huh and then go to page two which has like 19 wires and then page. Three, where, like your test, would be. If you look at slide 2, can you identify each wire like you should logically be able to like BAM right away?

B

Do this in your sleep up, it's like three has the answers 1 through 19 and the red ones are used in pro, so you really want the green ones for universal.

C

B

C

Cool yeah, yes, it does and.

B

Then I go into like that document like we can put more details into the next pages, thereby basically touch and feel every single wire, so yep yep just to clear up any.

C

B

It should be just yeah.

C

That makes sense it's a little hard to tell from from the picture.

D

E

I know it's all: yes,.

C

That's all it all makes sense. Yep.

B

And just very quick, no.

C

We don't have any drawings like guy. Thanks, keep drawing like dimensional drawings, yeah, all right of.

B

C

Wiring I'm Jeff, just above this, the current state of the d 3d wiring.

B

The current state no but there's a I guess I. That's.

C

Right expect because we've been changing it and yeah I, just that's something: I'm gonna want to put on myself to try and draw from from this picture and from the other documentation that we have it's just us. Okay, are you aware of d3d.

B

Mmm-Hmm wiring page, so let me send this link here. This is what we have from before that needs to maybe be forked and updated so that presentation de.

C

Lying the electrons wearing yet, oh so.

B

On wiring, if you go to the presentation there lists out, it does go through steppers and stops extruder bad and then he'd bad extruder. It doesn't list it blower. So there's a little bit of detail on slide, two that needs to be update. Maybe we can just fork page two of that presentation and update it, because there's a couple refinements, we made sense yeah.

F

B

That's a good working document to start from mmm-hmm like, for example, it shows the height probe on page five.

B

C

B

Yeah, it's useful.

C

This is very good yeah.

B

We could maybe maybe just like if you want to do it, take that doc and put on a d3, D universal page and well for cat first cuz. That's that's! That's old from the older versions! Yeah, the.

C

Athens archive mm-hmm.

D

B

The last thing inspired by Jeremy so I'm, creating a list of high schools near factory farm, okay, awesome take a look at that yeah.

G

I just started with like everything within about 50 miles, that I was aware of mm-hmm.

D

G

People I wanted to email in a way we went now.

B

What about if there was a district versus a school? Did you email, the district or the individual school? No.

G

I went straight to the individual career counselors, like kind of kind of at the school level yep. If.

D

G

They've been forwarded to the district people and they're the ones who usually get back to me, but I went straight to the to the counselors. How.

B

Long did it take you to drop the list, a.

G

Couple hours, maybe and.

B

How how much time you spend sending out emails? Oh I.

G

Spent I spent a lot of time because I was I sent a lot of you know. I sent a bunch of specific emails to other people, sent some specific emails to counselors. That I had references to from other contacts that I had I'm just trying to personalize it a little bit.

B

How much time would you estimate just for reference.

G

I've, probably between the scraping and finding contacts and emails, I probably have eight hours had eight hours into just giving the getting all that done. haha Thinking about which schools to go find well.

B

The return on that investment appears to be at least five thousand dollars at that time. So it's five hundred bucks an hour right do.

G

You have one I'm glad that's where we went with this I thought it I thought it took longer than it should have. I think you know. Moving forward on I've got a lot better idea of what I, what information I want and I don't have to think about the email too right, yeah.

B

Because I mean there was a very good outcome like the the Friday Harbor school I mean they basically want a camp and they say they have like twenty students. I don't know about the details will talk to them on Tuesday, but if that's a captive audience, that's that's worth worth our time and worth spreading. The you know basically we'll go get that island open source.

B

That would be good. We got the island and the sound of. What's it called Seattle. What is it? The sound called the.

G

Puget Puget Sound yeah yeah, there's like three or four big I'm, not big populated islands,.

D

Out there that.

G

The ferry system runs to and they're they're kind of well they're, fairly remote because of the ferry system, so it would be great for them to have some of this. You know on-site manufacturing.

D

G

B

That is good, we're taking over the steam cam scene through the huge it sound little islands. We start there, that's great okay, that's the only school that so far had a very, very, very positive response, or were there.

G

There's a private school here in Linden, where I live, that I've actually actually met with them.

B

G

Thursday for an hour and.

B

G

Pretty serious, but they they needed a little bit of time to think about how they want to. They want to integrate some of it into their curriculum, and then they also were probably gonna. Try to run. You know like a four or five day camp right at the end of the school, like the middle of June,.

B

Yeah yeah, that is awesome, so so it looks like sorry.

B

Looks like definite, clear paths. I mean it's obvious. It's like high schools, yeah like we could go to contacts with principals, but you can also do this very much like in our local area. That's a good thing because then we it's not a long investment to take a flight out there and so forth. So Chris, if you can I, don't know if you have any time, but you know all I see is supposed to be doing that and if we have any spare spare change, we we would, you know, hire somebody to do that.

B

We will probably, like maybe I, don't know- maybe I'm draya's we'll end up doing this. But that's that's the role like what we're trying to do here would be the role of the event planner. You know the person that gets all this going, but we don't have that person yet so we almost have them so we'll continue going. But that's it that's good! That's good! I'm gonna pursue that a little bit. So let's move right into the tablet. Yeah.

B

We should go to the working dock right, so yeah.

C

B

C

I added I updated some stuff this morning from some renderings that I was doing this morning, Oh gem straight some suggestions and some ideas. This is something I drove, quick and blender, up-to-date kind of on my log and on this working.

D

B

C

B

I'm in a working dock, so I.

C

Have all the rendering stuff up in my computer I thought it might be easiest to screen share and spin around in blender than some of these go hairs all right. Okay,.

B

So I just pasted the working doc, which is an apart library page, that's awesome, and let's actually let me just talk for a one minute on how we collaborate. So this is an example of an open product development process that we kind of paving the way to so. On top of the I mean the part, library is the most critical, so we can start with that, but on a part library for the raspberry pi tablet that happens to be our working page. We have our work document.

B

We should probably list all of our logs of people working on this up there. We should have a little scrubbing up there too, so between working doc, part library with like the history, that's a great start and then maybe the standard content like working doc, cadfael's, build build procedures and then links to other stuff. That's a basic wiki infrastructure that we're using right now, but yeah. Let's keep going so Christmas. You share your screen, see if you can give us a walkthrough, okay,.

A

C

So um yeah, so this is sort of the the shape that I came to as I was working through the renderings and design progresses. Jeremy was making and in terms of how things will need to be aligned in order for everything to get everything that issue and also with under the design constraint, I'm, getting it to fit all on a six inch embed, so I sort of a wet along the same lines as he was thinking and split, split it in between the inner components. So.

E

We printed that holds everything in place and.

C

Then how actually are components which comes that you know goes over the electronics and house everything rather than having one one long board in the center and then a traditional front, bezel and back bezel I would come down as five pieces. It was where I was thinking. We would print as these two separate components.

F

C

A

E

Rough sketches a blender like that. This is.

C

E

Dimensional- and this would.

C

All need to be rebuilt in in phreak and with full parametric's, but I just see sort of how everything would come together if this were yeah. This way, basically, so it's broken down right now between, like I, said the interior and the exterior, the exterior parts would print straight up right and slide over the interior parts would be these two brackets that would be printed separately and bolted together with a electronics bolted to them, and then yeah hi Michelle sliding over it as I was so they were a design idea that we wanted to.

C

We liked was to have these uh ports of exposed and have the bomb. Of course, the buns exposed here as well as I was making room for them. I kind of came around to it actually really liking this lucky design. We want to even involved it.

A

C

Further definitely.

A

Different from a conventional tablet, but it would lend.

D

Itself to doing.

C

Something if we like this, where angles for the back of extra bulky, then the template would sit nice, a viewing angle and portrait and landscape bug Oh without it. Without a stand, I mean we could also have nut, captures in corners and stuff for added modules and stuff for things like stands, but in this design, basically, it could sit on its own as a input device output device yeah this this angle, I mean.

C

Obviously this is over rough rough geometry- that that you would need to tweak and and find the right angles and, of course, to admit, but yeah, that's, basically what I was thinking, so the assembly process would be something like you would print out. The parts like this and these two parts, the two inner born parts, would be screwed bolted. Together. These two places the.

C

These uh this flat geometry piece is just flush against.

E

The back to the LCD and basically.

C

Goes around around the board component, so uh that's that way be yeah. Thirty boards can be close to each other and would be bolted together and then the final, the final bolts through here it wouldn't be inserted until after the two shell cases or put back on and then you would put the final bolts and through the four corners. That's.

F

B

You in any way.

C

B

That's sounds like a workable solution. There's and the ports in the back are exposed still.

C

So these ports are that are exposed. The HDMI is fine, and the power to the screen solution is all works. Fine, there's plenty of space on the interior. If it's bolted, this much, maybe even space to China, add some battery. But the thing I haven't figured out yet is power to the Raspberry Pi itself, which.

G

I figured the power how.

C

Do you get to the power to here yeah, but this with all without any uh cables or components, so that that that bit there, if we were doing a battery pack, if like if we sound like you're, saying in off-the-shelf lithium-ion rechargeable battery pack, we could, in the elsewhere, inside all this extra space, fit it and snug.

E

Against the side.

C

Of something, so it's charging for it to be exposed, while it was plugged into the rest.

C

That part I'm not exactly sure about, but as it as.

F

It is with this design. It should.

C

Be it's pretty easy to get in there. You could just remove the four bolts or maybe six, and it would slide open and you could get in there too, for example.

C

Well, yeah I was gonna, say change the SD card to change. If you wanted to swap between Android and Linux, then you could open it up in a different SD micro SD. In there oh wow.

B

That's actually pretty cool right. You can but.

F

B

Virtue of those D kardea of different operating systems, which is a quick snap, quick swap yeah.

C

You can store the extra one in here in a little pocket. You know you can open it up. Change your SDK. You can have many operating systems on there as you wanted. The.

F

C

Would be have another slot in the back here exposed where you could change that out and or have a little power port is similar to this. Cutaway you'd have another cutaway down here where the power could get in as.

B

This sounds like through the ports, the opening that exists. You can get the power cable, so you can use this wired right. Wired power with wired power.

C

As it's now, this crassness to intact case is currently designed. No there's not an easy way to get power in there. I would need to put a hole. Basically it would be account. You know there would be a slit and you would have the would be tethered it would be. Then the power cord would come out about the hole like this ladies headphones, where you couldn't unplug it from the Raspberry Pi. You know it would each other.

C

You know so it'd be like just stop yeah like this whole picture frame. Displace that do you know that they used to make, but obviously much more hobo yeah would be sit there and plugged in yeah interface, which.

D

C

Rather be able to take it up and move it around yeah for that it's gonna need either a battery pack solution.

C

The battery pack solution makes the most sense to me, because if we just get away to expose the port we're still gonna have to when we move it, unplug it from the wall and plug it back in so it doesn't make much difference I if.

D

C

Gonna be putting it in a bag. If guess, the power cord is captive.

B

I would see like, since you got that that flat plane on a backside. We can just attach a battery pack, there's like four magnets there and just keep it there, an off-the-shelf battery pack sure and just slip a little in.

D

B

And then you can replace that hmm you have a quick yeah, quick charging external battery pack. There did.

C

That would make it hot like even swap out edition battery back to that would be, could be, and you could then that way we don't waste base in the back in the case to try and fit a battery right it. Now we can work on that later, but yeah.

B

Then give you the option.

C

Is if you want to have a battery pack or I'll, go to the wall, love.

B

G

B

A

C

A

I think it's great.

G

One comment on the wiring is I was still using the one of the USB ports just to feed data back to the touch screen. Yes,.

C

G

F

G

One USB and and the Ethernet and left the other USB inside the case, so that I could route it. We could always solder to those pins too I mean that's, that's something that is fairly well documented online, which pins to use and.

C

Since we're already soldering that you.

A

Know to get our award, but I think that that would.

C

Be fine I'm, just.

A

Like yeah we're my.

C

F

C

From the device you're using one.

G

Of these guys yeah. So if you look at yeah from the top there, the one that, on the right side of the view you're looking at right now, I haven't.

F

G

The case so that I could feed it USB into the front, but since we're gonna be doing some soldering, it's not that big a deal to. We could find the pins on the backside of the board to just put our wires down there and then.

C

How do you get and then what plug did it go into in the touchscreen? It was actually one of one of these on great snow on the outside. It was.

G

It in the center of the touchscreen board like right, basically in the middle there's three probably test ports, maybe they're factory test ports, but there are also solder pads and they're labeled, ground, D+ and d-, and those are your USB inputs or your USB data lines. So.

C

You can you can ignore this touch screen the this actually USB port on the touch screen, yeah.

G

And I haven't tested, but I suspect, I, don't know how it's routed. Those are probably all on the same USB wiring circuit within that board, so you may actually be able to use the USB s on the edge of the touchscreen s to access the PI once everything is soldered together out of it all.

F

C

G

F

You said you haven't.

D

You haven't tested.

F

C

Soldering tonie's and DP grande.

G

I tested soldering to the board that works, but the other end of the court I just had a normal USB plug on so I was I had that plugged into the PI and then the wires.

A

E

At the back of the.

G

Touchscreen now.

B

A

B

That sufficient to give you both wait, are you doing data and power to that? No.

G

So there's two other test ports that are kind of in the upper right hand: side if you're looking at the back of the board, they're labeled, five volt, positive, I, think ER and.

A

The I ground and.

G

So I ran power to those two ports off of the GPIO pins, I, think four and six know, but there's a ground and a positive on the top on the one like around two or four on the GPIO. So I ran a power from there to the screen to power the screen and then I use the USB to do the touchscreen interface like the data, the data side. Does that make sense? If you go to page five.

F

G

Six, let's see here, yeah, go to page seven in the current working document and there's a few. Your poor pictures there that.

D

G

Explain it: okay, larger.

G

This is not not super helpful in these pictures, but okay, so you.

B

B

You got GPIO for power. Is that so with the yellow and orange wires and.

G

The orange yep, the yellow and the orange, so if you go to my log, I, have a photo gallery that I embedded that has at the end of it it's down around February 16.

G

I should just go. Take some.

B

Hi photo gallery yeah whoa.

F

B

That's a good one. What is that it's.

G

Just that's great: it's it's an HTML, oh yeah, I just found like a site that, let me it puts like it, puts the photos in all one at a time as a HTML links, but then it it piles them up into a photo gallery. Oh.

B

This is the source of those files.

G

On Google Drive in Google photos yeah it's in Google photos, and so you don't you don't have any bandwidth on your or any yeah.

B

G

Space taken up on the wiki, cuz they're just links, that's.

B

Awesome man: oh, we.

C

Know this is great that.

B

What, let's see just.

F

B

A

F

Find this, can you, how do you document.

B

How you did that yep.

F

B

Okay, I'll be good; huh okay, so that's cool okay, so you got that yeah! Okay, so I see the gpio to power.

D

G

Yeah I could I guess: I could just share the okay.

B

Now, where is the data? Is it the the white green black wires yeah.

G

That, yes, the three wires to the kind of that go into the center of the board, trying to see yeah.

B

B

So we're liberating all those USB connections- yeah, okay, yeah! You don't.

F

C

Cables there either at that event, vo, you just need a three seven three wires connected.

G

C

G

B

That's a $5 capital gain right. There.

D

No that's yeah.

G

I tested, I tested that, and you know, powered it up, use the touchscreen using.

A

G

Usb C charger to supply the power to the board and it works.

B

How, let's see the on the slide? Pi tablet Linden photo archive. So when you have the white grey purple wire the triple wire yep, the header, there use wait. What you do there.

G

I soldered a header on so I sawed. Her I just took one of the headers that we had and I had laying around, or that came in one of the kits and I cut it down to three pins and I bent the pins 90 degrees at the end, and then I used those used soldered that to the board, so that I could pull the wires out easily how difficult for Ted that was really easy to solder.

G

So, okay I found that to be easier than trying to hold all the wires because then the pins, you know the little the header plug just stayed stayed while I solder didn't really move well. That's.

B

Good okay, so we got data. What does it say there? What are the labels on those pins? What's it say on the back, you.

G

B

Down to like January.

G

G

No all the way back to like January February, first I, think there's two close-up photos in my log of what the pins are. Labeled yeah.

C

I see, grounded.

A

B

Dn, oh yeah, D NDP, all right.

C

B

So that's a through-hole that you can solder to or yes, yes,.

G

D

G

Have no I mean I I, assume they're either for this use or they were to test those circuits once they soldered everything on to them. I, don't know they work, though, which I checked him for you know for continuity before I did anything and it's like all checks out back to the USB plugs on the side of the board. So so we might as well just try and see what happens well.

B

So sounds like we have a wiring solution, work that combined with Chris's design. That means Chris. We got it. We just got to work out some detail right, I.

C

Think so is the power getting power? Is the last bit I'm not sure about where we are talking about out of getting a USB power pack that we could stick on the back in a test? Fine I checked, so that's the only the last thing I'm looking at right now is to what another cutout on the back would be so that we could plug the power in either the wall or with a power back yeah I. Think I think we have a pretty.

B

C

B

Can we go to page two of the working doc.

B

So we got back a screen. We got the power pins data three pins. So let's see, if I understand this correctly so and then, if we look at it, the pie is like right here.

B

Is that about right so that Jemmy, you see it, you see where I am yep.

F

B

C

Working done, which page page.

B

2 but yeah, okay, there you go so we got like the power pins like right in the corner there somewhere. The data is like right there or something shift.

G

This around that.

A

G

Input is kind of right in the center of the board or where we have to scatter to that's. Why I folded them over cuz I plan to have the pie sitting on top of.

B

It Oh pie on top okay pie on top.

D

B

So I mean if we do like an external battery pack, do we have let's see if we do the power, then can we do a little like a modified wire where we can plug into this using the power pins, the two power pins right? We can just shred up a USB cable for that and maybe mounted into the case, so we plug in the battery pack into that.

G

So I was I was not able to find really good information on if you wanted, if it was wise to feed the power back through the GPIO s, so in my wiring I was feeding power into the PI and then out of the GPIO pins to them to the screen.

G

I mean it's all the same. It was in the same circuit, so it shouldn't you.

B

G

Want to go that and I.

B

G

I I, just I, don't really know, I read and one of the things I read was like it might be a bad idea to supply power to the PI through the GPIO 5 right.

B

G

Have the USB see that's after the USBC plug and whatever.

A

G

Are built into that regulator? Well, can.

B

We, what happens if we feed the battery and instead of GPIO, we feed it through the USB c-can. We do that that'll be a good.

G

B

G

Need three and a half to run the pie and the board, and that's like the bare minimum or the pie on the screen. So I had.

A

G

Battery packs laying around, but none of them were able to do three on one USB plug so.

B

We're thinking the limit there is access to 3.5 and battery packs. They.

G

They they're out there I, just I had some real, cheap and laying around and then again they were all like two points.

G

Where is a good place to post a link to how to do the photo album and one of the wiki like usage, doc.

A

B

To the photo I'll yeah like this is highly relevant to the Raspberry Pi tablets so put on a part library for the Raspberry Pi tablet. No.

D

B

Have a page called Raspberry Pi tablet, but it has a lot of the other non-essential stuff we from there. We have the Raspberry Pi tablet, part library, where we get.

B

Looking for some battery packs, let me say Raspberry, Pi or battery pack or doing fine. Is it so if we find one, that's three point: five amps with the current geometry is it would we be able to feed it through the USB, see I.

G

Would think so yeah.

C

So let me show you again where I was just looking at how much spaces in there right now, as this current drawing is and so to get into the back USB C port, it would be some sort of cutout that would be like this yeah. It would be I heard an awkward angle that you'd stick the cable in or.

C

Leong I'm not sure, or we would use this space in here- to try and get an actual battery packs like we're talking about, can.

B

We try to mount like a can. He go from USB C to a USB regular, so that, okay, how do we make the interface between the battery pack and the USB C? Maybe we can run a wire that goes into the case and there's a plug on the case that we plug in the battery pack to so the interface cable, okay,.

F

C

That makes sense, then we can get it into anywhere. We wanted to be on the board and that would make to.

F

C

A cutaway thing or yeah, hmm so then we would just yeah like using an interface cable. Some 6-inch thing: that's just going to jump it from where it needs to be to somewhere on the edge of the board mmm that we.

B

Could put any battery pack or.

A

B

Interface, cable goes from usb C to regular USB, so we can plug in any battery pack.

B

That has a USB connection.

D

C

Now, without the I, never is a USB scene to micro, USB adapter is what you're saying I. Don't.

B

Know he's here to complex: what's common for battery packs, it would seem micro.

C

Usb is the most that that I've, okay in personally, okay.

B

C

These days, okay,.

B

Yeah sounds good.

G

Yeah I guess I see a lot of with just the standard was at USB a like the larger plug on the one in for the output side, and the input side is always micro, USB for the charge site a.

B

Charge side to a device.

G

The output, the power out, is usually your standard USB plug I think this is a type a like the the big ones that are on the pie. That's output, power too, and usually the other side of that case.

G

Yeah. Let's find a battery pack.

C

Mike might, or you might go to USB anyway,.

C

When the plug itself will have a USB a then you, you know that.

G

You put your connector in, but you.

C

G

So here's um you see the to a ports. There are your power outputs. Yes,.

A

Not oh yes, the other port.

G

C

G

So I'm just thinking if we get an off-the-shelf battery pack, we're probably gonna have that USB a as the somehow we're having to feed that power back to the board or to the PI I.

C

See what you're saying well, we haven't it to that one out has an output jacket out as a USB a but then you would just get it you pair it with the cable by the USDA could be anything here's BCE or might use B or whatever.

C

G

Or we could I mean it doesn't even mean we just need the right ends right. You.

B

G

With an A and and go to wires, it doesn't even need to be a cable. We just need to get it to a C plug on the other end,.

C

Now guess the question is: what would we be looking to plug into this thing to pata to power it that's charged it just to just to run it right.

B

G

Kind of think you know it, it would be best to just get it if we're gonna use an external battery pack find one. That's a has a/c input, just cuz I think C is probably gonna have more. It's gonna have more amps yeah.

C

G

Don't know I haven't read through any of the standards or anything, so this is all just kind of guess. Work.

D

G

The nice thing about, if we get a C pack, is that if you want to then use the you know the wall charger or if you change anything, there's no, it's just switch the cable around and keep going yeah.

D

G

You want to go to wall power, yeah.

F

G

How accessible the internal port is, where the where the PI is being powered through.

C

And I guess accessible I'm, just looking for a small, it should be as small as possible. Six-Inch might be the smallest. We can find of a USBC male to female. You know jumper.

B

F

B

To female yeah.

C

That way, we can mount the female end on the wall and put the nail in to end of the play, but.

B

They look kind of expensive mm-hmm wall, you mean case yes,.

C

B

B

The female thief see female.

C

B

C

Yeah on the edge of that case, so that yeah we could plug yep or wall idea.

C

G

Job, what if you just find the plugs without the cable says its yeah.

B

Then we can basically get them.

G

B

G

It's just that's.

B

C

F

C

F

C

G

Need two wires yeah.

C

And this is like 99 cents versus $15 for for just the terminal jumper component, instead of the actual whole cable.

G

It's more fun that way too yeah.

C

Great I'm, assuming there's gotta, be a place in the raspberry pi 2 wire power directly and still go through all that safety.

F

B

Didn't find it Oh sounds like no. The only way you get access to that is through USB see, then.

C

We're done making our own cable that's getting mail, eternal and female terminal, and just bothering it together for.

B

C

B

A

B

A

Can't paste a no just a just.

B

A plug without wires does anyone have yeah.

B

So I put a link to that one battery pack, let's see, would that work. That's 20 bucks, oh there you go. Let's see is that, are you gonna be able to solder two there's the two tiny.

F

B

You put a link to that.

C

Yeah I'm, just on eBay.

G

Here is: there's a couple of them: where's a good spot to dump into place working dog.

C

I'm, just gonna put my this ugly link in the comment you so here's. mmm This looks like.

B

This has solder.

C

B

Fyi, can you can click on that picture there and I.

D

B

Which I'm doing right now yeah? So now, if you click on it, it's got the link underneath ah awesome.

B

Ok, USB, C terminal jumpers. Ok, so it's a dollar verse! Oh man, 20 cents versus 15 dollars from China might might.

G

Cap 27 problem.

B

With some disease as a bonus.

G

B

Okay, okay! Well, definitely, some too sure we can find something I'm.

C

Good, let's do is it's, it would be so much more compact than.

G

Any cable we'd buy yeah.

A

G

No jacket, no insulation, none of the none of the jacket around the plug. That's always.

C

G

C

Could make them writing? You know a shorter angles, whatever we whatever we need. That's.

B

Okay, YouTube soldering to a c type connector.

F

This is top secret.

F

G

It makes sense if we're gonna start.

F

G

There to just take power off of that plug for the bull or for the board one way and for the screen at the same time as opposed to have in the past the power all the way through the five I.

B

Like it, yeah yeah.

G

D

He doesn't have.

G

To mess around with the GPIO for that yeah.

B

G

B

Go so a satyr job instead of another connector, something new yeah, okay, yeah sure.

B

Let's say as peace.

B

You look at that video at.

B

Let's see is that as bad as it gets, if okay.

A

If you look at.

B

That video I put on the next page I'd like.

B

30 seconds from the end.

B

Doesn't look fun but but we need only power, so maybe it would be easier for us Oh.

E

B

Wait is that a bad, a video, let's see we, it's not good. Let's see the.

G

Solder pads with the love.

A

B

Let's see what's going on, ok, ok, I see other stuff. Let's see! Ok, oh yes, I! Let.

G

Have a little solder pad on the back like a little tiny circuit board with them? Oh, yes,.

B

G

Yes, lug is already on a board with solder pads yep, probably what we want to go. Okay,.

B

And it's still doable I see one for a dollar-fifty.

B

Usb three-point I see: let me copy that okay yeah with a little solder pad okay.

A

G

E

The value Express.

G

Yeah and depending on how those mountains are the case, you know we may or may not need them. Your jacket.

G

A

G

Or three or they're the same three on one.

G

Oh, did we lose Chris.

D

B

We yeah okay, so I'm, seeing.

B

I like it so we split the cable USB same on edge.

B

G

Trying to find a diagram that shows, if we're gonna solder, those data connections back to the pipe board with which pins.

B

What are you trying to find sit again.

G

On the board, we're gonna have to pick pick up the pins on the underside of that USB port. If we're gonna leave all the all of the existing USB ports exposed to the exterior of the case, we're gonna have to solder the two data lines the D and the DP I think that's what they are.

G

Since the first time we talked, the instructable list of high projects has grown quite a bit, so I did put a couple of links to a couple of to the whole list in the bottom. Here of the pie in.

B

Working duck yeah yeah.

G

The part library, a part library, there's one fairly substantial tablet project where he I mean he did there's a lot of cutting and soldering and pulling pins off the board, and so I think he may actually have the.

B

Is that the third link pi4 be instructional instructables.com, yes, yeah.

G

That 5:4 be instructionals e, they got, he got pretty carried away at this.

D

A

G

It went all out.

B

Who is this guy.

B

What's a date on this thing, do you see a date.

A

B

G

B

E

B

That's recent February 2020, yes, yeah.

G

He just he just posted it, because it wasn't here a couple weeks ago, yeah.

B

As he used an open-source tool change there, or is he all not.

G

Really I didn't didn't dig into it too much.

B

Take a look at.

B

D

B

Well, let's see why don't we just copy, like man that seems to be very well refined, why why don't we just copy that, let's see what's missing from his oh wow.

G

He doesn't have the camera stuff, but he it's really involved because he's pulling he's pulling a lot of components off the circuit board right at the beginning, all the USB stuff comes loose.

B

Come taking it off the screen.

G

Yeah pulling parts off of the screen circuit board, it's a different screen than we have I. Think it's actually it's the Raspberry Pi screen I think it's a little bit lower resolution. If I remember right, it was one of the things like the.

D

G

We used was a bit better.

B

Let's see what he's using there.

B

Wait says official Raspberry, Pi 1080p camera front-facing, but is the V one o.

G

Is the camera in there I didn't see.

B

G

The case 1080p.

B

Official Raspberry Pi 1080p camera front-facing, holy cow he's got an accelerometer yeah.

G

He said I mean it's a fun, it's it's really involved. It's kind of a neat project looks like that. He.

B

Put a lot of work into it: let's see: okay, let's see it. Let's evaluate one disk. I mean he is GPL.

B

One, who is this guy.

E

Are to create and see a certificate, we're going to be using open SSL in order to create that certificate. Unless the bigot, we then going to create a machine City. This is the one that we apply to our Astra's PDFs.

A

B

Holy cow, this guy looks really good. It's a new GPO he's uh he's interested in telephony, Linux, asterisk electronics, DIY development, home automation, cloud computing; okay, this guy. We need to contact.

B

Well, his license is good. New GPO I want to see talk to him. Okay,.

G

He's not listed at the top or which.

B

G

B

Is he's got a repo at the video, so look at the video in the description of the video he's got his github repo and it's a new GP l. This guy appears to be for real.

B

Licensed as a licensed engineer,.

B

G

Yeah, it's it's a neat. It's neat it's! This would be one of the like earth like the pie. If we wanted through another five-day right, okay,.

B

G

Because the build is fairly involved, yeah.

D

G

G

There's some time here.

B

The whole man, okay,.

D

B

God I'm looking at it, looks like the video is pretty comprehensive. Yeah.

A

B

My goodness, huh let's see okay he's not using free CAD, but okay.

B

We can address that readily he's got the STL's.

B

I want to see what let's see what the screen is. You said this screen is not the same as ours.

G

I was looking at some screens early on when we first ran into the wiring issue and I thought the screen we had was higher than that resolution. Although.

A

The price is about.

G

B

huh Take a look at his.

B

B

Kaijus that power hat.

G

The touchscreen here did you pull that up. Yep I'm.

B

Looking for it still, okay send a link.

G

I can't tell you: where is it yeah I'll put it in the working and I? Have the video chat on my tablet so.

G

Page 2 of the working doc I just put that antennas on Amazon is saying it's only eight hundred by forty okay.

B

G

I'm sure ours was no.

B

G

D

D

G

Times is 10 1024 by 600, so significantly higher resolution.

B

When he use that one, it's.

G

Because of the you see the ribbon cable there coming.

D

G

Integrates right down to the to the board, so there's a major space.

D

G

On as far as cable even goes and that that ribbon, cable has your touch inputs and your power and your HDMI all on the one cable.

D

B

It it's attached to a break. How do you attach it to a breakout? Is then attached directly to the PI, so yeah.

G

The PI has a DSi port right here, one is for the camera and one is for the PI monitor or the pi screen and.

B

One of those DSis- that's where you plug in a cable, yeah.

G

So one of the DSi goes to the to the pi screen.

G

Let's see, there's.

A

G

Other you know the one of the downsides is. The screen has to have that extra circuit board bolted to it, but like in his video, he goes ahead and just make something almost flat. So.

B

What extra board.

G

A

An extra little board I'm.

G

Good, the screen is sitting out there to the right. That's like that's like the video driver board, okay,.

D

G

The equivalent of our of the poster board on the back of our mm-hmm well.

B

I know man, okay, so I'm looking at this, and if this is so well developed, I'm like and it's a GPL, it meets our spec. What's missing that we shouldn't just copy that and go down to the screen resolution just for now, yeah.

G

An Isis, Ida, I I was wondering the same thing initially, especially on the screen, because that DSi cable solved a lot of our cable issues yeah but yeah. That is a little bit rest less resolution, although on a small screen, seven inches, you know that might not be a significant difference for most people, I suspect, Raspberry Pi will come out with another official stream. That is probably the same form factor but higher resolution at some point as well.

D

G

Can't imagine you're changing that. You know what I mean yeah.

B

So it is a big mess in the back, but I mean all.

G

B

G

Right, like it's all, it's all developed already and the instructions are here well.

B

I mean it's that's what I'm saying like I mean you look at the the wiring and uh say like 55 at minute: 55 20, which is a hairball, but that's no different than the 3d printer controller. Yep.

F

B

Is very manageable.

D

B

It would take you time to just cut those wires, but no it's like just regular and not so super I.

G

Mean he it's it's all out, because it's got a sound card in it and it's got speakers and got microphones and the gyroscope, but I didn't I did not price any of this out. So I have.

B

No idea what that was: okay, yeah, so price price will be there.

B

G

There's a there's a fair bit of hardware here that we can do the quick rough run through his Amazon thanks and just see.

B

B

I'll get him as an instructor. Madam.

G

B

Then then, run highs, bigger.

B

And it kind of fits the profile, so he's a software guy, and this is a side project. So it's not that's. Why he's open-source he's cross subsidizing it and that's what we need.

G

I just amazes me how cheap the pie hardware is. If you look today, the components are: there's just not a lot of dollars tied up in them.

B

G

B

Affordable well.

G

Just look I'm just looking as I go through the list of components here, I think it's.

A

G

So our other anarchical other screens out there, maybe I, may read this wrong.

G

F

G

F

A

Touch me: okay, that's.

G

A

Of I was so cheap.

G

You recall: did you get just a Raspberry Pi, be with 4 gigs of RAM right for what we had in the first hit, yeah 60 $60? Or what did you have a better 55.

B

B

If there's there's some issue like the PI juice thing appears to be discontinued,.

B

That's in the comments and out.

G

B

Oh so that's kind of no go. It.

G

B

Says they're supposed.

G

To have been March here on the top, but I didn't really read through it.

G

So I just pull it up a list of stuff that he linked via Amazon mm-hmm.

D

G

Up at about 240 $250 that doesn't include the really little stuff like some of the wires.

G

A

It price fans and.

G

One of the piece of Woody's after the back yeah, so 242 mm-hmm.

D

G

Is what I came up with.

B

G

That is a little extrapolating on a few things that aren't Amazon. First single one. You know they want dogs, but I know you access to them for a lot.

G

The USB break outs and a little fast buttons on Amazon. They come in kids of like fifty or a hundred mm-hmm.

G

Alright sooner. That's me! That's it's not bad yeah.

D

A

Quite a bit more, but it's quite a bit.

B

More functionality.

G

Than we were well.

B

The the pie that we have that ended up being like 200 as well yeah.

D

B

It's like 40 bucks, more or so yeah, so similar price.

B

Now there's a couple of things. So one is: why is it's a uninstructed all that has it updates as by-nc-sa.

B

Attribution non-commercial, share-alike.

G

Oh, the creative commons, the little tiny link above the video yeah.

D

G

Probably a that's Instructables, I bet you that's an Instructables thing.

D

Mm-Hmm, because.

G

He clearly in his get you know. Obviously the get link is yeah, his totally open source.

D

G

And I wonder if in his youtube channel, if he hasn't.

B

Good see this pied juice, yeah.

G

He's got yeah everything just links back to his github page yeah.

B

So that we seem to be okay, okay,.

G

I'm sure I would guess yeah I would say that is probably Instructables, because it's in the same line as the download and favorite buttons on the other side of the screen. So that's probably them putting a Creative Commons on on this instructional, not necessarily on the get library, because I can't imagine they can do that.

G

Yeah he's even got some of the software. You know, programs, they do that promise services. You need to blow it up. It's all here.

D

B

Are we concerned about pi juice.

B

The thing that's good about our deal is that we kind of have full control to do modularity and scalability, whereas we just got a little bit less control like that with the other one right.

B

I mean I kind of like.

G

Yeah, it was the the process we started. You know we had some very you know nice and features that we were planning to incorporate at some point. Yes,.

B

G

Helped them form the original design. A lot like the battery pack yeah figure out how we can integrate this at some point with.

F

A you know an open.

A

G

B

G

B

If we do his route, it's pretty much getting canned into that said, and it's like okay that doesn't really meet our longer-term goals. Right, mm-hmm.

G

Not that we can't take a few of the things like you know, maybe it is worth it to switch to that screen.

D

G

The long run to reduce the cabling size- and it's pretty easy, apparently to take these to take all the USB ports off your board. If you want to shrink it by another five or ten millimeters.

B

Yeah, if you watched a video that that seemed to be not a problem or is it a dangerous operation.

G

He just has a very small like side cutters that he slides under there and just kills the shields off and his hips all the pins mm-hmm.

D

G

I would say pretty pretty standard didn't even have to like heat up the solder on some of them.

B

Yeah, well maybe we could borrow some ideas, but probably a continue going with with ours.

B

What does the deal with a pious thing? That is it just a good I mean? What do you get out of it, that you don't get with our route.

G

Yeah I was just trying to look through that and decide. You know where, where that sits, and why it's on that. The second question I think.

B

It was the convenience of feeding power.

A

B

Feeding power, as a hat not through I, mean I kind of like our discussion of the little USB thing that we can now add any battery pack. That's that's attractive right.

G

Yeah yeah because it doesn't matter and if the if it goes dead and you access that port from the outside, if you're using a battery pack out there, it's just like oh I, have another one here: let's just switch them done right.

D

B

Oh yeah and his his route is he's using a lot of the the wiring he's just plugging into headers. So it's not oh yeah, so it's actually quite tractable.

B

Way to see it like raspberry pi's in the one case, no.

G

There's only one pie, another.

B

Board is that flat board is interface for the Supreme.

G

Lord yeah yep there's a interface work for the screen that hi juice.

B

Wow, so so the big advantage of that other screen is is just a tightness of the cabling right, yeah.

G

It's a ribbon cable and it's got. You know its own mount point on the board.

D

Mm-Hmm, that's.

G

Separate from the other two HDMI house and my.

A

Thought on that is okay,.

G

So this is kind of a migrate use case, for this is in use. It's like take it and do a presentation with it, and so you have these HDMI outs and if you use the pi screen you're, not you don't need. Those HDMI is to run your touch screen and see if you could leave them exposed to the edge of the case and all of a sudden, you know with one cable you can plug into a projector or a screen or two screens, even to do a presentation or to at least have all of your.

G

You know information. You brought right there with you on a tablet that you can just pick up. That's.

B

The advantage of them the other PI screen, yes,.

G

If you use the PI the official eye screen, so you don't, if you don't use the HDMI that are, you know like? If you leave gage demise available, then you can. You could move those to the outside of the case either with a jumper, cable or or get the PI board itself mounted near the edge.

G

So you can run a monitor with it. Then, okay, I'm, a second.

B

G

Like it, that's a huge advantage for a tablet because I you know none of my tablets or phones or anything that I've had like you.

B

G

Plug those into a TV and use them like a computer, so yeah.

B

So the Raspberry Pi 7-inch, so you saying the one with the rib inverse- allows that more easily or no yeah.

G

I think this, the one with the ribbon cable, the your liberating the.

B

G

Seven extreme you're liberating those two HDMI ports off that one side to them, then placed wherever you need them to because you're not constrained by your cable but.

B

Then, if we use our old route, we still have one HDMI available or.

G

Yeah, if we leave it a veil, if we leave it today, if we can find a way to put it in the case that way, yeah yeah yeah, which is still like that was my you know. My chunky case design was all about, leaving that one HDMI out so that I can take this with me to give you know if I'm teaching or presenting somewhere and just plug it right into the monitor or projector no.

B

That'll be good, it would be good.

B

So what would you suggest for this time around I.

G

I think I think because it's only a couple weeks away, we stick with where we're at and the Carters resonate. I don't know if it's worth the change, I think.

D

G

Is there six or eight weeks between this and the next class I think maybe immediately following the end of this class, we could have that discussion with the other instructors. I think they want to change yeah.

B

Well interesting, interesting.

B

Now why didn't we run into this one I didn't run into this? Is this like a new scream, or this has been around for a long time, so I didn't really run into this I.

A

G

B

G

D

G

Scream for a long time that was smaller, they.

D

B

That's the atronics 7-inch.

G

Hey Curtis.

C

Hey guys so sorry about that I found part. Oh.

F

C

Doing a this huh yep.

B

Yeah so we'd looked at this this acid, this other thing other pie, project plan on Plan, B use, slide, three looks really good actually and it seems to be open source but too complicated to shift right now to that now, with 800.

C

B

Cool, oh, you got, I got all excited about it and it's also good new GPL. So it looks pretty good it's, but we would it's just unfortunately, I don't think I mean to modify it like. We want to I. Think the cool part about ours is that we actually have some stuff to design and modify later, that we'd be reducing certain locations.

B

So we're saying.

C

We would be able to drop this in Lira in between bug, type-c, female and clog detritus email, this connector here, okay, it could just go in line between those two anywhere in the case and you.

D

G

Are two separate pages.

F

G

I'm tasting yeah check.

F

Out the instructables.

G

It's a super involved, build of a PI tablet, Oh.

G

B

I think yeah, we don't do it for now. Let's see we should we could kind of do a matrix of comparison like I mean definitely like it doesn't get you the battery flexibility. It doesn't look like because it's so highly engineered like now to re-engineer you pretty much have to probably like start from scratch in some way now. I wonder if the resolution of that screen matters so much because I know that when I tried, the I didn't use the fullest resolution because it was just super high.

G

B

So actually, I think probably using the the plan. B screen may be actually quite good, give an advantage of the cable. hmm Should we try to just incorporate the new screen right now, so.

G

We incorporate the new screen yeah, we save all of the soldering, so the main screen that we're gonna do with the screen we have so.

D

G

Simplifies that a lot you know, power, USB and and the HDMI are all on that DSi, cable, so I vote. If we're gonna switch screens, it's only a few dollars difference in cost. It.

E

G

Simplifies the electronics work we need to do and we can then you know let participants focus on design.

B

B

And then what so we're gonna scrap our old screens well,.

G

I'd be I'm gonna make it work, we're so close I'm on it.

B

Word, hmm while we're running to legacy.

D

E

B

For this camp should we just say no I think like if we're gonna be building massive amounts, like you know, go forward, we probably do want to switch to the simpler to wire up right yeah.

B

If we evaluate closely what what steps need to be done like that, those little resolder in jobs, that kind of adds up right to the cable makes it much easier.

B

I'm asking about that, you think that's fair to say, yeah.

G

B

Know: okay, well,.

G

A lot of the risk of somebody, you know not, you know, you've got a rookie starter and they keep that thing up a whole bunch and now, all of a sudden, their screen doesn't work. Yeah.

B

Yeah yeah yeah. No, that's! That's. uh That's a definite reason to do it.

B

Now, in terms of the form factor for rotor using does it does it match the case that we already started designing or are it's a little different I.

G

F

Gonna be a little bit different, but.

G

I, don't think actually yeah.

B

Man, if we avoid that fat, HDMI cable there, that's a big deal, yeah.

G

The HDMI cable is the yeah plus the soldering like to me. It's a.

D

G

Of a slam dunk, if we, if we switch screens yeah.

B

Okay, so let's slam dunk and switch screens? Yes Chris. What do you think.

C

Yeah I mean so that's that's this Amazon link. It's.

G

It's the official PI 7 inch screen, it's I think on the Amazon link in there. It's a couple I see.

F

G

C

See yeah I means a simplification of assembly, it makes sense and it's it's a couple dollars difference. Mommy yeah,.

G

I think five: what do you recall? We paid for the screens, Marcin yeah.

B

I was still like sixty yeah.

G

C

Does this work only on the new PI or.

G

On on any planet, because.

C

I'm so far as our software goes, I actually have two PI's going in this so idler as applied to that is able to run legacy. Os the Android OS, whereas the newer PI fool or you can run Linux, but it's not able to run Android yet but I know minor consent, minor consideration.

G

Mm-Hmm do the older pipes.

F

Have that side.

G

C

G

The camera has.

C

G

C

Yeah, probably not.

E

C

I, don't mean by for its is what doesn't work I'm behind left, so that would make that would make sense to me moving to this new one that would be for everyone.

C

All the new participants would be giving us you have to order extra kids, don't fare all four.

A

Teachers said, you know what I can.

C

Reduce that components I have.

G

C

Of with the old screen, yeah.

G

We might what the new screen, but we have to death the.

C

Components don't mean the case. Well, we got I could start working on depth of the cases it's currently outlined, with the components that we have and then try and retrofit it in the news arise, but.

B

Ya know maybe Oh No. Maybe we continue this yeah cuz cuz same here like we don't have those screens with us in the days are running. Surely.

C

B

Think definitely we want to switch to this for the next one movie for this one just continue with old one or whereas the benefits so overwhelming.

F

C

Mean it would be easy.

F

C

Would be easiest to pull together a minimum viable build with what we have for this for the upcoming.

E

Camera probably.

C

Unless we've decided right now and got the new parts on order, because but at the same time, keeping in mind immediately that we're going to be making, this change will finish. The MMO viable products with the current components, functional.

F

And then, at the same time, beginning.

C

These next components and modifying it to smooth over should not should.

F

B

Should not be very difficult, yeah moving over will be too difficult, I think maybe.

B

So for the question of timing: yes, so what we say leave it at this one: leave it at the old screens.

C

I would say so this.

A

G

A

Pie, that's in.

G

A

C

G

There's a there's a Bourdon on the screen, that's separate! Oh.

F

G

Just a circuit board for the screen.

D

C

We would have to I see but I'm still seeing. How are this missing in.

E

C

Case the time we've been talking about today would work around this same thing. I'll be fine. I could go forward with existing components that we have. When is your final order date for.

B

The coming yes! So that.

A

B

Ship to the locations so to be like a one week from now, yeah.

C

So I don't know: I would be nervous to giant to plan on switching over to this in case, there's something we just missed here.

G

I'm I'm in agreement, if that we can go with the hardware, we have I think with the short time period. That makes sense yeah now.

C

You can order a much newer one of this one of these new screens and play with it over there and see. If we can, you know retrofit and see how it's how it's gonna work better. You know we.

B

Have eight.

C

Copies or something else this, as the current kit out there I think.

E

We should definitely get at least a.

C

Good eight solid house yeah.

B

I'd say so, and yeah and Jeremy, like you, said, the soldering is not particularly onerous to get it right. No, it's not.

C

The best person in the grill soldering can the most you know, yeah.

G

B

G

There was a room on that board that I was able to slide like a real thin like a putty knife as like a heat barrier so that I didn't over eat anything else. You can get that underneath there to wear that patsaks Oh, mm-hmm and I think I slit a small piece of like paper or cardboard into the other one, because it was writing a little overboard. I couldn't walk it out.

A

B

A

B

Well, that's I mean okay, that's that's confusion for now, but that's actually positive progress for the future.

B

C

B

Okay, okay, so that's.

D

Much more compact, mm-hmm.

B

Yep, okay, so let's, let's keep rolling the way. What are our conclusions for then moving the the way we are so I'm going to look at the USBC on edge of Pi case we're going to get one of those those USB 3 connectors with a little circuit board. So we can solder to that readily.

B

And so try to integrate so Chris yeah, like I'm I'm, moving.

F

B

So slide three with the check the green checkmark use, something.

F

B

Where we can solder readily and that, then we can build that into the case. So we can plug wait. Let's see, would the battery packs yeah the battery packs would have the you know. If we want to go super duper, we can go, have one USB C and even do another length, one that's USB be for other battery packs, let's see so the battery pack, that's that we can select. Is that one that I put in there? Does that look like a good one? It's 20 bucks.

B

It says it's a PI 4 B battery pack and let's see what you've got for the connector.

B

It's 21 bucks. Let's see, might look a little bit.

B

huh Wait, what's it say.

D

C

Seems pretty compact as well.

A

C

B

Said can do three amps.

C

Which should be enough.

G

D

G

Test it where's the output.

G

So I know that the PI needs like two-and-a-half amps to food, and the screen is like another 700 to 900 Miller house. If it's running.

A

G

Wouldn't we power the screen via USB I, don't know if you guys did this, but if you power the screen via the USB and you tried to boot the PI on the screen. At the same time, it would just hang because it didn't have enough power to food I.

C

Did notice that and was wondering why that was the case just.

G

Unplug the screen it would boot and you could actually plug the screen and after it booted and then it would.

F

G

But when you power it over the GPIO pins, it's fine.

B

Okay, now that's that's one battery pack, but but in our route we.

G

B

In any battery pack, right.

G

D

G

Think we need three and a half.

B

Let's see so how about I'm looking at one.

D

Well, how about.

A

G

There's a comment in here that says: it's for I have loads of 2.5 some uses this.

B

I'm five: oh no! That's.

D

Five volts three and.

B

Let's maybe, instead of looking for Raspberry Pi, let's see USB battery pack.

B

Oh yeah, yeah, yeah, okay, so, for example, I want to don't look at pie. Here's one that came up right away for four point: five amps 26 bucks, I.

D

B

G

Okay on this charger to.

B

G

There one discharge port or two one of the things I ran into is: there was lots of packs that were rated for 3.5, amps or 3.1, but one of the plugs was rated for 1 amp and the other one was rated for 2.1. So you could get 3.1 out of the pack, but you had to be running two cables out of it. I.

B

B

Yeah I see what you say: let's see, can we combine the two outputs, the way we're what we could make a custom cable where we just combine them both no or or or do they fight each other I? Don't.

G

D

B

Yeah this one says total current of 4.5 amps, which means probably 2.2 each or something.

B

I see so a lot of them just happened. Most of them happen to have like two two outputs and they share the output power.

B

Well, here's one: that's.

B

Let's see, what's this thing.

B

Why did a lot of these individual packs not say the amount of max amperage.

B

Well, I guess the one that says like 4.5, total current, we can so say one there's 26 bucks just combine the outputs now.

A

G

Think that would work, because the voltages are all the same, and you know it's just gonna drop what it means it.

B

Should work they'd have to test it yeah.

G

We know those are outputs, so it's not like it's gonna try to feed powerful. It's not like there's two batteries. It should be all from one battery. You.

B

Know be the same battery set, but going through two different charge: controllers.

B

No power controllers, yeah.

B

Yeah, it could be. I can tell you this when you take two 12-volt power supplies that run off AC, you blow them up if you try to connect them together, but this is running from DC the charge. The circuits there are different, so I don't know, but we should be able to combine the two USBs in which case so I'm, seeing one for like 20 bucks.

B

B

B

That's pretty good yeah.

B

No, that's! That's! That's a pretty long life.

B

Because each 18 650 cell, that's like three empowers right or is that what it was I think it was yeah.

D

Three empowers.

B

So we had like 15 list claims to have like 27 it's interesting. Three views are pretty good, yeah yeah I guess so we should. We should definitely test get one ASAP and test it to see. If we could power the pie, yeah.

G

And I have a what is this one rated for I? Think it's rated for two.

G

So I can do some testing with the one I have here rated.

B

G

Two twice: no, it's rated for 1.5 amps on the one plug-in 2.1 amps on the other one. So together, I should be at what three point. Six.

B

Do you have a fine.

G

I'll find out, if it, if it, if it goes if it catches on fire when I hook them up together. You.

B

Want to do that before I buy this then.

G

Yeah I can do that this afternoon. Okay,.

B

Won't you do it and see if you blow it up or not. Okay,.

A

Let's just okay.

B

Thinking about a little bit, what's the likely thing to happen so if it has batteries same batteries that provide power but has two different power circuits. When you combine the output, if it's DC, it's probably switched, it's probably switch mode DC, but coming from a similar power from a similar voltage.

B

So the question would be like that: are you feeding power back back.

A

B

One to the other and does that mess it up? Do you have any insight on that? Well, it's let's Google! This can. Can you combine.

G

I just am happy I.

B

G

Find the outputs of a power bank.

D

Did you just google.

G

It yeah there's, there's answers here so I'm starting to read: hey.

C

Yeah I gotta go take care of some stuff, but okay, I uh I'm, gonna I'm gonna, keep following on. Don't might just leave this on. Just got to do some work or I might leave it on loud. So I can still listen in yeah I'm gonna get some Case Files out ASAP into the part library of the design that we're talking about so.

B

We could start testing yeah see if we can print that out and then our last sort of tears getting the power pack. Okay, yeah I'm, just gonna leave.

D

It as a net where a hole for an external.

C

Power and we'll figure out, you know and then we'll be.

B

In the middle excellent, excellent, okay sounds good, okay, take care, yeah, so Jeremy yeah. Let's move on that and you know we were trying to get an off off-the-shelf battery pack, but I mean we might you know we might just go back to our original idea with 1856 50 cells ourselves, because we did have the the charger the wait were we running them? No, we were we weren't using our battery bank that we made ourselves, but we can always go back to that with with a charge. Basically the circuit that we need.

B

We, the little blue circuits that we had those worth of for the power right they were. They were good for, like 4, amps or something or I, think they were acceptable, so yeah yeah, we'll have to we'll have to figure it out, but between that I think we can move. I mean we'll figure out something for the battery, let's see if the the existing ones work and then just continue on a case and yep see how far we got yet.

B

But no, that's that's good progress on the getting that next screen just to simplify the wiring I. Think that's good for next time around, but for now just to do the screens we already have okay.

G

Yeah I'll work on the power here. The power issue see if I can't we'll see what runs off the battery path, see how many amps we actually yep.

D

G

Then there is a couple of Google hits for how to combine this or what's gonna happen so to.

D

G

B

Okay sounds good all right.

G

So else I need to deliver no.

B

I think that said yeah. If we just continue on the power power delivery, we've Kris is gonna continue on the case, and we got to integrate that. So we have all the parts we've got a week until we have to drop ship, so we still have a little bit of time. Okay,.

G

Do we want to talk about this? Are we having a call next week or well.

B

G

We want to have a call prior, let's.

B

Let's keep in touch we're definitely meeting on Friday right so yeah at least then, but if we have any solutions before that, we can communicate on email, yeah.

G

Perfect perfect.

B

G

Right well, thank you and.

B

Have a good evening: okay, Jerry! Oh! Thank you! Good work! We'll continue this all right!.

F