👂🎴 🕸️
<
p
class
=
„
fragment
“
>
tricky
situation
:
USB
charging
5V
''
LiPo
batterias
3
.
7V
''
e
-
ink
controller
needs
5V
''
solar
panel
gives
7V
p
><
p
class
=
„
fragment
“
>
diverse
circuits
for
voltage
increase
(
booster
''
step
-
up
)''
decrease
(
buck
''
step
-
down
)
are
needed
''
or
current
stabilization
(
photovoltaics
)
are
needed
p
><
p
class
=
„
fragment
“
>
WittyPi
allows
us
to
get
current
/
voltage
information
''
have
inner
clock
''
have
device
with
its
own
boot
on
''
boot
off
cycles
p
><
p
class
=
„
fragment
“
>
cute
little
Voltmeter
connected
to
the
third
state
of
the
main
button
p
>
<
p
class
=
„
fragment
“
>
DISPLAY
::
e
-
ink
(
Waveshare
7
inch
with
IT8951
controller
has
<
1s
full
refresh
rate
''
also
supports
partial
refresh
)
p
><
p
class
=
„
fragment
“
>
SOUND
::
8
OHM
/
8W
speaker
Visaton
K50
connected
to
Respeaker
2
-
mic
audio
out
p
><
p
class
=
„
fragment
“
>
USB
male
to
female
cable
''
with
port
exported
to
the
side
of
the
Primer
p
>
Raspberry
Pi
Zero
v1
<
p
class
=
„
fragment
“
>
AUDIO
::
Respeaker
2
-
mic
array
with
additional
button
p
><
p
class
=
„
fragment
“
>
Grove
-
Gesture
is
PAJ7620U2
(
I2C
)
p
><
p
class
=
„
fragment
“
>
ssh
p
>
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