►
From YouTube: Applied Hydraulics 2 - Remote Control Tractor
Description
-----------------
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A
So,
let's,
let's
take
a
look,
so
I
was
looking
at
okay
well
thinking
about,
what's
what's
an
easy
way
to
implement
controls,
remote
controls
for
our
hydraulics
and
the
advantage
we
have
is
we
already
have
the
high
power
hydraulics.
We've
built
the
hydraulic
devices,
power
cubes
that
are
modular.
We
know
how
to
use
these
controller.
A
These
solenoids
like
this,
which
are
just
simply
on
off
valves,
so
you
got
any
big
machine
like
a
tractor,
a
heavy
motor
or
a
big
cylinder
yeah
you
can
control
it
just
like
that
all
you're
doing
is
using
a
relay
in
a
step
before
that
the
relay
gets
a
little
signal
from
a
microcontroller
like
an
arduino,
or
this
arduino
compatible
thing
that
has
wi-fi
built
in.
So
it's
like.
Okay,
that's
arduino!
A
You
program
it
with
arduino
ide,
easy
you
gotta,
just
download
a
library
to
like,
for
example,
if
you
want
to
use
this
thing
with
wi-fi,
all
you
need
to
do
in
arduino.
Environment
is
download,
download
a
library
that
handles
an
extension
that
handles
that
so
you'll
see
that
appear
as
one
of
your
devices.
A
A
So
then,
if
you
have
a
cell
phone
you
can
you
can
go
that
route,
and
so
I
was
looking
at
okay.
How
do
you
do
like
stuff
that
anybody
has
everyone
has
a
cell
phone,
so
you
could
do
a
like
a
joystick
app
where
you're
actually
controlling
it,
you're
touching
it
and
releasing
on
on
the
phone
like
this
joystick
app
like
I
found
this
video
like.
I
was
googling
this
and
I
just
found
this
real,
quick.
A
Skip
the
ads
here
and
so
they've
got
this
joystick.
Take
a
look.
It's
it's
that
little
button
on
that!
That's
how
the
blink
app
looks
right
there.
It's
like
that's
your
joystick
in
a
piece
of
software,
that
that
does
that
it's
called
a
blink
app.
So
I
was
like
oh
cool.
That's
easy!
This
guy
shows
everything
how
to
do
it,
including
that
the
nodemcu
thing.
So
this
thing
you
just
touch
it.
You
know
you
touch
it
one
way
or
another
way,
and
then
he
makes
that
thing
line
up.
A
That's
wireless
going
through
going
through
wireless
now,
what
happens
if
that
that
was
our
microcontroller
connected
to
the
solenoid
valves
that
that
control
the
tractor?
Well,
that's
it's
as
easy
as
that.
So
it's
kind
of
inspired,
that's
pretty
cool!
All
right.
We
could
knock
that
off
in
a
in
a
day,
look.
B
The
cursor,
the
current
controls
on
the
on
the
on
the
tractor,
is
that,
like
the
levers
you
pull,
is
that
a
mechanical?
Like
effect,
you
affect
the
the
valves
basically
of
the
hydraulic
system
mechanically
by
those.
A
Yeah,
what
happens
in
the
valve
you
have
so
you
got
these
valves,
it's
mechanical!
It's
a
it's!
A
piston
that
goes
inside
your
cavity
and
depending
on
the
piston
has
has
notches
in
it
has
rings
in
it
notched
out
so
that
when
you
push
it
like,
maybe
it's
closed
off
right
now,
but
when
you
push
it,
it
hits
that
ring.
So
if
you
look
at
actually
what
a
piston
hydraulic
valve,
piston.
A
It's
that
it's
this
cartridge
thing
and,
depending
on
let's
take
look
at
some
images
when
it's
pushed
in
and
that
notched
out
part,
for
example,
is
engaged
that
might
let
fluid
through
if
it's
like.
Well,
I
don't
really
understand
how
this
explicitly
works,
but
if
it's
like
against,
if
the
flow
flow
goes
like
that
by
exposing
that
party,
it
could
either
like
let
flow
through
or
it
can
let
it
go
in
the
holes
and
whatever
the
geometry
is,
but
basically
think
of
a
mechanical
block.
A
It's
like
going
like
that
and
like
that
at
high
pressure.
They
typically
do
it
with
cylinders.
Why
cylinders,
because
they're
easy
to
seal
with
o-rings,
because
this
is
high
pressure
like
3000
psi,
so
these
things
are
typically
cylindrical
and
that's
what's
happening
inside
a
valve
like
here.
Here's
a
diagram
like
it's
kind
of
like
whether
this
is
mechanical.
Where
you
push
that
so
that
corresponds
to
that
cylinder.
You
push
it
here.
A
It's
blocking
off
the
ports
when
you
push
it
towards
that
indented
part,
it's
actually
opening
up
the
ports,
so
this
could
be
ma
enacted
either
by
hand
or
with
a
solenoid.
A
A
So
the
only
way
you
can
do
the
lever
valves
if
you're
sitting
on
a
machine
and
the
real,
very
practical
thing
for
me
like
right
now,
if
I
could
get
that
that
blink
app
working
like,
for
example,
now
is
actually
grading
drainage
around
the
cd
go
home
too,
with
a
micro
track,
I'm
sitting
on
it,
I'm
going
back
and
forth
with
the
bucket,
but
I
can't
really
see
what's
in
the
bucket
I'd
like
to
like,
be
actually
in
front
of
it
and
have
my
controller
and
see
exactly
what
I'm
doing.
A
Okay,
I
gotta
get
that
dirt.
I
gotta
bite
a
little
deeper
with
the
bucket
because
I
can't
really
see
over
it.
So
it's,
it
is
actually
quite
convenient
one
for
the
fact
that
it's
safety,
because
you're
not
on
a
machine
that
can
tip
or
like
you
go
backwards
and
you
don't
know
a
tree
is
behind
you
to
crush
yourself
and
things
like
that.
I
mean
there's
real
safety
issues
to
operating
heavy
equipment,
so.
A
A
A
This
was
the
inspiration
I
was
thinking
about
it
so,
but
to
talk
about
I
mean
that's
just
one
aspect
like
the
that
little
joystick
thing
is
one
aspect,
but
do
we
have
everything
that's
downstream?
Well,
yeah,
I
mean
the
dc
relays.
We
know
how
to
do
that.
We
do
that
for
the
cb
press
and
we
run
that
through
an
arduino,
that's
below
this
board
in
our
cb
controller.
A
It's
no,
no
big
deal
there.
What
you
have
is
you
got
power.
You
got
12
volts.
You've
got
these
little
black
blocks,
which
are
the
actual
relays,
there's
actually
a
a
winding
that
moves
a
piston
back
and
forth
to
make
a
contact.
That's
what
happens
in
there
just
like
on
the
power
cube.
You've
got
the
relay
for
the
starter,
it's
also
a
coil.
It
moves
a
heavier
contact
to
make
a
touch
to
handle
much
more
current
than
the
signal
that
you're
using
to
trigger
it.
A
You
activated
by
two
leads
going
from
output
pins
from
an
arduino
so
that
that
one
there
is
typically
typically
rides
on
top
of
arduino,
uno
or
mega,
because
those
are
actually
compatible
boards
that
pin
out
on
this
this
specific
micro,
this
specific
relay
shield,
that's
a
relay
shield
that
it's
plugged
into
the
top
of
the
arduino
so
that
you
don't
have
to
make
any
wire
connections
the
pins.
All
the
connections
are
already
there.
A
So,
whatever
code
you
program
into
your
arduino,
you
can
activate
those
four
relays
accordingly
and
then
those
bigger
terminals,
therefore
the
outputs,
four
three
wires
per
output.
So
there's
four
of
those
black
blocks
and
four
sets
of
terminals,
not
sure
why
they
have
three
three
per
each
but
yeah
the
wiring
diagram
is
online.
A
So
you
need
power
to
this
and
a
signal
to
this,
and
then
you
connect
whatever
you
want
to
trigger,
and
that
thing
you
want
to
trigger
is
your
solenoid
valve
so
the
solenoid
valve,
and
we
were
talking
about
this
kind
of
system
like
the
other
day,
solenoids
valves,
they
live
on
top
of
their
screw
down
with
bolts
these
bolts
that
come
with
them
to
this
block
that
has
the
in
and
out
hydraulic
power
lines
from
the
power
cube,
and
then
you
can
control
the
outputs
there's
going
to
be
four
outputs
like
those
four
holes
on
top
there.
A
A
We
know
this
stuff,
so
so
we
we
know
everything
from
here.
We
haven't
really
played
with
this
kind
of
a
route.
So
wes
is
saying
yes,
a
joystick.
You
can
print
that
this
does
rely
on
wireless,
so,
for
example,
we
can
do
it
in
the
shop
we
got
wireless
there.
You
know
we
can
play
with
that.
What?
If
we
don't
have
wireless.
D
C
Well,
we
need
we
need
gps
and
wi-fi
everywhere
on
the
farm
to
be
able
to
autonomously
control
the
tractor.
That's.
B
A
A
A
B
A
A
Button
out
in
the
field
there
I'm
out
there
when
I
describe
the
use
case,
I
want
to
look
at
exactly
like.
What's
my
bucket
doing,
because
I
I
can
look
more
closely
without
being
in
danger
and
stuff
like
that,
so
there's
various
use
cases
the
simplest
one
being
just
to
see
something
work
remotely.
Like
I'm
saying
like
what
do
we
have?
We've
got
a
few
days
left
to
play
with
powerful
industrial
equipment.
E
E
E
D
E
A
A
A
Yeah,
you
got
your
tablet,
you,
like
you,
got
your
selection.
Now,
okay,
I
want
to
use
the
c
b
press
and
you've
got.
You
know
you
can
have
literally
I
mean
the
use
cases
we
got
our
micro
factory.
We've
got
our
soil
piles.
A
You
got
the
tractor
with
a
camera,
you
can
actually
go
on
your
computer.
You
can
control
it,
you
can
you
can
do
the
operation
that
you're
doing
out
there
from
your
control
computer
in
your
house.
If
you
want
to
like,
for
example,
I
get
a,
I
get
an
order
for
some
bricks,
and
you
know
I
just
get
on
my
tab
on
my
computer
and
say:
oh
okay
I'll
actually
start
that
process
and
you
could
even
then
talk
about
things
like
okay,
you
pre-program
your
tractor
because
you
know
the
soul.
A
A
You
want
to
be
careful
about
that,
and
but
then
it's
like
automation-
and
you
can
actually
you
know
that
promise
of
us
doing
whatever
we
need
to
do
in
our
life,
to
enrich
our
life
and
make
a
better
world
as
opposed
to
just
trying
to
make
a
living
kind
of
a
thing.
So
I
mean
that
promise
is
still
there
to
be
to
be
delivered
to
more
people.
Yeah.
A
A
A
A
So
what
do
you
need
to
control
the
tractor
to
go
back
and
forth
and
spin
in
circles?
You
need
to
connect
those
power
outlets.
Take
the
hoses
from
the
micro
track.
Their
quick
connect
just
plug
them
in
here.
Lay
your
power
cube
your
automated
cube
on
top
of
the
the
micro
track,
and
you
got
your
your
cell
phone
and
you
can
control
that.
D
E
A
So
yeah
existing
power
cube
is
on
a
micro
track.
Let's
say
let's
say
we
use
that
there's
a
power
cube.
It's
got
two
hoses
that
come
out
of
it
with
quick
couplers
that
right
now
we
plug
into
our
valves
take
those
hoses
plug
them.
As
the
in
and
out
of
your
automation,
power
cube,
which
would
have
with
two
valves.
You
can
go
back
and
forth
and
turn
so
we
should
do
that.
Do
two
valves
create
the
power
cube
with
the
two
valves
have
an
in
and
out
quick
connect.
A
A
Two
channels
of
bi-directional
valves,
yeah
that
we
haven't
considered
yet,
but
I
mean
we've
got
four
of
them.
We've
got
four
of
these
if
we
wanna
but
start
with
two
like
let's
get
two
things
going.
E
A
Yeah
and
we
can
add
the
two
other
ones-
not
a
problem-
it's
just
another
set
of
two
hoses
that
plug
into.
We
would
divide
the
power
from
the
power
cube
into
two
or
like
put
them
downstream
of
one
another
actually
put
them
downstream
of
one
another,
and
then
it
will
work.
D
So
I
was
thinking
about
our
current
just
more
generally,
our
current
approach
for
and
like
separating
stuff,
that's
most
likely
to
fail.
The
only
thing
I'm
worried
about
is
that
it
takes
up
so
much
more
space,
so
I
was
thinking
like
in
a
micro
track
or
something
like
that.
I
don't
think
you
really
have
room
no.
A
A
Yeah,
like
what
we're
doing
right
now
is
kind
of
like
to
play
with
for
education
and
for
like
larger
devices
where
you
can
easily
fit
it,
but
right
now
on
a
micro
track,
I
mean
that
power
cube
is
packed
as
it
is
already
it's
kind
of
hard
to
fit
the
you
know
the
fan
on
there
already
and
stuff,
like
that,
it's
tight,
that's
difficult
like
once.
Once
you
try
to
actually
compact
it,
it
gets
a
little
hard,
but
things
like
life
track
and
bigger.
It's
pretty
easy.
A
You
got
a
lot
of
space
yeah
because
we're
trying
to
get
the
micro
track
actually
within
like
42
inches,
which
is
like
the
industry
standard
for
these
compact
yard
machines.
You
know
so
yeah
I'd
say
like
let's
wire
this
thing
up
to
get
an
experiment.
Well,
the
third
third
part
of
the
power
cubes.
A
We
could
get
a
team
on
this
wes
on
the
electronics,
so
there's
the
frame
there's
the
valve,
so
I
mean
we've
got
those
on
individual
blocks,
so
we
can
get
two
people
on
that.
You
can
do
four
valves
if
you
want
to,
but
basically
the
inlet,
inlet,
quick
connector.
Here
we
have
the
power,
the
actual
the
pressure
switch.
We
don't
need
that
necessarily.
A
If
we
do
use
that
we
would
have
the
ability
to
sense
pressure
and
say:
oh,
the
pressure
got
high
stop.
So,
for
example,
if
you
hit
a
tree
pressure
goes
high,
stop
automatically.
You
know
some
a
lot.
You
can
add
logic
like
that.
B
C
A
Yeah
like
we
would
do
it
in
an
open
area.
First,
before
yeah
I
mean
tested.
So
how
do
you
test
this
thing
immediately?
You
would
plug
in
you
know,
say
a
cylinder.
You've
got
a
bunch
of
cylinders
just
put
in
it,
so
plug
in
a
cylinder
to
these
outlets.
Put
on
a
table.
Do
your
blink
app.
Does
the
joystick
work
to
extend
and
retract
it,
and,
if
we're
confident
about
that,
we
can
take
it
to
the
tractor
and
that
drastic
thing
is
like
you
have
to
hold
it
to
make
it
go
yeah.
A
A
B
A
Yeah,
like
I
don't
know
like
what's
what's
an
idea
of,
I
mean
in
these
applications
when
what
happens
like
software
aside,
you're
you're
running
some
loop,
I
guess.
C
A
C
D
I
take
like
the
in
my
most
rudimentary
implementation,
agnostic
approach.
You
take
your
whole
entire
implementation
code,
put
it
in
a
big
like
while
loop,
and
you
just
keep
sending
a
signal
from
your
phone
to
the
controller
that
it's
looking
for
and
while
that
signal
is
on
the
rest
of
the
curl
that
goes,
and
if
that
signal
level
goes
away,
it
just
passes.
It
stops
the
whole
program.
D
It
resets
all
of
your
control
signals.
D
C
B
A
a
string
or
a
rope
to
the
fuel
pump,
connector
and
joint
yeah.
I
don't
think
we'll
have
that
issue,
but
yeah
it'd
be
interesting
to
see,
raise
down.
Walls.
E
D
A
A
So
if
we
zoom
in
we're
talking
about
npt
national
pipe
thread
versus
o-ring
connections,
which
s
called
sae
fittings
here,
this
fitting
that
goes
into
the
block
specifically
is
designed
as
one
of
those
o-ring
fittings.
You
can't
screw
in
a
regular
npt
like
that
here,
like
you
see
all
these
npt,
you
notice
that
they're
npt,
because
they
don't
have
any
of
that
black,
the
rubber
on
it.
So,
but
here
we
got
these
fittings,
the
minimum
is
like
well
avoid
this,
the
safety
the
bypass
valve
you
can
avoid.
Like
you,
don't
need
a
gauge.
A
You
don't
need
the
pressure
sensor,
the
minimum
vehicle
product.
There
is
just
put
a
quick
connect
fitting
on
it
inlet
outlet,
so
we
can
connect
to
the
the
micro
track
and
then
you
screw
down
your
the
solenoids
onto
they
screw
down
on
the
side
with
the
multiple
holes,
the
small
holes
there
they're
the
bolt
holes
for
the
bolts
that
come
with
the
solenoids
and
those
four
four
larger
ones.
Those
are
the
actual
fluid
channels.
So
you
see
like
those
those
are
pretty
small
they're
like
not
much
bigger
than
a
quarter
inch
but
yeah.
A
All
we
need
to
do
is
well,
let's
use
the
frame,
because
we
want
to
mount
this.
So,
let's
use
a
frame.
We
mount
this
whole
system
and
that
and
just
put
it
on
top
of
put
in
a
loader
bucket
of
the
micro
track.
B
Right
there
yeah,
but
does
that
not
already
have
one
of
these
aluminum
blocks.
B
A
A
We
leave
the
all
the
levers
on
a
micro
track,
so
you
don't
have
to
destroy
any
of
that.
We
just
take
the
hose
and
plug
it
into
our
automation.
Power,
cube,
yeah,
section
yeah,
so
I
mean
that's
pretty
cool,
so
you
can.
You
can
do
both
both
like
oh
yeah,
so
instead
of
putting
the
operator
on
this
on,
you
know
the
operator's
stand.
There,
put
your
power
cube
on
the
remote
control
power
cube
on
there.
That's
your
operator
now.
So
that
would
be
the
the
convenient
place.
E
A
E
Your
computer.
A
And
then
you
got
like
the
full
like
automated
stuff,
but
you
can
still
do
like
it's
not
a
far
cry
to
have
wi-fi
and
an
actual
connection
to
your
vehicle.
You
see
where
it's
going.
That's
probably
going
to
be
code
approved
before
the
fully
autonomous
vehicles
you
know,
and
then
you
can
have
lower
lower
your
costs.
If
you,
if
you
have
that
infrastructure
in
terms
of
delivering
things,
you
know,
so
it's
definitely
an
application.
A
C
Yeah
I
one
thing
that
open
source
hardware
is
lacking.
Is
this
automated
storage
and
retrieval
system.
A
A
A
A
So
so,
do
you
understand
how
this
system
goes
together?
Can
you
put
one
together
some
solenoid
valves?
Where
do
we
put
the
controller
box
or
like
the
little
microcontroller?
A
E
A
Cb
press
shows
that,
like
our
microcontroller,
it's
just
the
box
like
there,
I
mean
right
right
there
yeah,
that
is
a
re
yeah.
That's
actually,
let's
see
which
one
is
that
that's.
A
No,
that's
just
cb
controller,
which
was
doing
for
no.
No
that's.
Actually
that's
that's
the
one
that
we
were
working
on.
That
was
the
wireless
one.
A
So
don't
take
this
apart,
but
this
is
I'm
not
sure
if
that
we
never
really
tested
that,
but
but.
C
E
A
A
box
like
that,
like
on
the
cb
press,
just
a
little
electrical
box,
so
we've
got
plenty
of
those
in
the
shop,
so
we
can
put
the
put
the
electronics
the
little
microcontroller
in
there.
If
we
want
to
do
that,
so
we
could.
We
could
put
that
into
the
automation
cube.
So
it's
actually
weather
tight,
yeah.
A
B
That's
which
compatible
with
the
blink
app.
C
A
A
A
video
kind
of
the
one
that's
right
here
under
this
blank
app,
I
mean
there's
pretty
much.
They
tell
you
all
the
steps
of
how
to
do
it.
Here's
download
the
code
download
the
extension
for
arduino
download
the
blank
app,
so
they
kind
of
take
you
through
all
the
steps
in
six
minutes.
What's
the.
D
A
A
Typically,
the
arduino
would
be
a
another
board
under
this
here
that
doesn't
fit
under
that.
So
what
you
need
to
do?
You
got
those
headers.
You
got
to
connect
wires
from
that
header
into
those
female
headers,
because
otherwise
those
those
connections
would
there
would
be
there
automatically
here
they're.
Not
so
we
use
the
jumper
little
jumper
wires,
arduino.
A
That's
how
you
can
make
those
connections,
we
got
those
you
can
use
these
male
side,
one
side
and
female
on
the
other.
If
you
look
at
this,
you've
got
both
male
and
female
headers.
Those
are
just
pins
connected
to
the
same
terminals.
That's
you
can
either
put
a
pin
in
there
or
put
a
header
on
the
other
side.
A
All
you
got
is
okay,
here's
a
triple
terminal
block,
so
you
connect
one
wire
to
there's
the
electrical
connections
right
there
and
that's!
That's
it
like.
So
you
need
two
wires.
You're
gonna
go
like
this
connect
the
two
wires
into
that
little
electrical
enclosure.
On
top,
then
one
of
them
is
power,
one
of
them
like
plus
minus,
and
then
this
board
it
handles
the
power
yeah.
I
think
I
don't
know
where
the
power
terminals
are
here.
A
A
So
if
you
do
what's
the
easiest
way
to
do
that,
we
got
12
volts.
A
D
A
I
guess:
what's
the
specs
on
this
wes,
how
do
we,
if
we
got
a
battery,
how
do
we
give
it
give
it
usb
power.
A
D
D
D
D
C
A
Yeah,
those
like
those
things
for.
A
A
B
A
B
A
So
let's
just
show
this.
This
is
cb
press.
The
microcontroller
are,
we
sure,
there's
a
flyback.
Diode
basically
got
to
put
a
diode
across
the
terminal
connections
on
the
solenoid.
A
C
A
A
That
would
be
ground
because
it's
connected
here,
so
it's
probably
plus
here
negative
here,
plus
a
negative.
Now
what
you
got
to
do
is
do
a
diode,
meaning
that
upon
turn
off
you
get
a
because
there's
a
moving
part
in
there.
That's
spring-loaded
it
snaps
back
and
creates
electricity
feeding
back.
So
you
gotta
you
gotta,
short-circuit,
that
electricity
through
a
little
diode,
so
a
diode
would
be
actually
like
this.
Here
there
you
go.
A
There's
that
picture
you
gotta
do
that
these
are
just
little
diodes
and
they're
oriented
and
note
diode
points
to
positive
terminal
on
solenoid,
so
the
diodes
have
a
bar
on
them
like
a
silver
mark
on
one
end,
which
denotes
positive
and
negative,
the
diode
so
that
the
side
that's
marked
with
the
the
line
goes
to
the
positive
terminal.
A
E
D
Shot
key
diodes
over
all
of
your
a
lot
of
power
sounding
conductors
and
things
like
that.
They
serve
the
same
purpose
on
the
fault,
conditions
and
turn
off.
You
need
to
be
able
to
dump
any
residual
current
in
the
circuit,
but
these
just
chucky
dials
respond
really
quickly.
So
as
soon
as
the
power
cuts
they
redirect.
A
Sounds
like
you
want
fast
response
time
here.
Yeah
any
diode
like
I
know,
really
potential,
whether
it's
like
shotkey
or
others,
but
when
you,
google,
flyback
diode
on
amazon,
that's
what
you
get.
A
It
just
loops
it
through
the
coils
of
the
so
it's
making
it
like.
If
the
coil
is
connect,
you
know
coil
one
end
on
the
other.
It's
connect
shorting
short
circuiting
across
the
coil.
So
then
the
energy
flows
through
the
car
and
just
dies
because
there's
resistance
there,
okay,
so
instead
of
that
energy
going
wherever
else
it's
connected
to.
A
A
A
One
amp
diode,
I
mean
you
want
like
we've
got
a
couple
of
amps,
but
a
small
diode
like
as
long
as
it
doesn't
burn
out.
It's
just
a
quick
sudden.
A
Sudden
impulse
yeah
so
stuff
like
this,
these
ones
three
amp
that
would
probably
do
because
the
how
do
you
rate
a
diode?
Is
it
by
what
the
normal
current
is
or
for
what
the
peak
is
well,
the
peak
is
huge,
so
I
think
three
amp
refers
to
the
just
the
regular
current
that's
flowing
through
that
circuit
yeah.
D
E
B
A
A
A
D
So
I'm
trying
to
just
make
sure
I
got
this
straight,
so
the
block
this,
let's
let
me
show
the
block
it
can.
A
A
So,
but
you
got
to
consider
that
one
side
is
the
inlet
for
continuity
of
fluid.
You
have
to
have
an
outlet
which
is
right
here
on
the
other
side,
so
it
goes
through
the
block.
If
nothing
happens,
if
you
don't
trigger
your
valves,
it
just
flows.
Free
free
flows
through
the
block.
It
goes
back
to
tank
it
just
idles
wastes
energy
nothing's
happening
there,
so
you
can
get
actually
like
when
you
talk
about
electric,
an
electric
you'd,
probably
just
turn
on
the
motor
to
activate
something
like
you'd
turn
on
a
pump.
A
That
would
be
how
you
turn
things
on,
so
you
wouldn't
be
idling
all
the
time
like
with
a
gas
engine.
You
don't
whatever
you're
idling
you're,
just
wasting
energy
with
electric
you
could
just
trigger
whenever
you
actually
want
to
do
something.
So
the
electrical
systems
could
be
actually
much
more
efficient,
but
outlet
is
here.
A
And
then
we
got
work
ports
on
the
actual
valves,
the
block,
the
block,
the
the
metal
part,
which
is
it's
actually
aluminum
there.
Why
aluminum?
Because
it's
easy
to
machine
and
you
got
all
these
channels
in
there.
So
typically
those
things
are
aluminum
and
you
got
those
four
work
ports
and
that's
what
you
connect
to
your
motors
in
our
case
for
the
micro
track
or
whatever
load
like
a
cylinder
we're
gonna
test
with.
A
A
A
Okay,
they're,
not,
I
don't
believe
they're
parallel.
I
think
there's
tricks
to
there's
details
to
that
which
you
got
to
pay
attention
to,
but
all
we
know
that
if
you
got
this
double
block,
you
feed
the
practical
consequences
of
feeding
power
into
is
you
can
trigger
one
you
can
trigger
trigger
the
other
you
can
trigger
both?
A
Yeah,
it's
all
the
this
complex
circuitry
inside
that
block.
They
got
all
kinds
of
channels
in
there
that,
however,
guides
it
and
the
geometry
of
the
actual
valve
inside
the
solenoid,
the
actual
black
part
there's
that
cylindrical
valve
there
that's
got
its
intricacies
on
it.
How
it
guides
fluid
where
it
lets
it
flow,
so
yeah,
but
they
are.
A
I
can
tell
you
their
series,
because
their
experience
from
the
brick
press
was.
We
were
surprised
when
running
two
two
cylinders
at
the
same
time
reduced
our
pressure
on
like
the
compression
like
in
the
brick
press
when
you
turn
move
the
drawer.
At
the
same
time,
it
actually
reduces
the
pressure
you
have
that
that
was
our
experience,
so
you
there's
detail
to
this.
So,
as
is,
I
believe
these
are
series.
A
B
A
A
I'm
not
sure
actually,
okay
and
the
practical
outcome
is
that
we
know
it
spins
and
it
has
all
I
can
tell
you
is.
If
you
see
me
driving
that
like
can
like,
I
was
doing
it.
If
you
do
both
valves,
you
have
two
motors
and
you
have
more
pushing
power.
If
you
run
one
valve
you're
gonna
have
all
that
fluid
go
through
one
motor
at
higher
speed,
it'll
go
faster,
but
the
torque,
because
you
got
one
motor
instead
of
two
feels
like
it's
got
less
less
actual
drive
force.
A
D
A
A
So
you've
got
two
valves
in
series
so
that
the
fluid
goes
through
one
and
then
the
other.
So
you've
got
two
so,
but
the
only
thing
you
got
to
disconnect
is
the
inlet
on
the
first
valve
and
the
outlet
on
the
second
valve
so
because
they're
going
flowing
through
to
each
other,
it
goes
into
the
first
one
goes
out.
The
second,
so
first
valve
outlet
goes
to
the
inlet
of
the
second
valve
and
then
through
the
outlet
of
the
second
valve.
So.