Step 17
–
some more resistors and a diode
Ok, let’s solder the rest of the small two
-leaded
components.
•
Solder the 2.2k ohm resistor (red, red, red,
golden
) to the place marked “R1, 2k”
•
100 ohm resistor (brown, black, brown,
golden OR brown, black, black, black, brown) to
the spot marked “R6, 100”
•
two 4.7k ohm resistors (yellow, purple, red,
golden) need to be placed on the marking “R4,
4k7” and “R5, 4k7”
•
1N4148 diode needs to go where “D1, 1N4148”
is written on the board. Important:mind the
polarity of the diode by making sure that the
black ring on the diode matches the marking on
the PCB
Step 18
–
headphone connector
The headphone connector goes to the place marked
“X1,
STEREOJACK”
.
Although this connector was built for stereo sound
output, MAKERbuino can only output bleeps and bloops in
mono.
Because of that, both left and right earphone are bridged
together and connected to the same sound output
channel on the microcomputer.
Make use of our previous pro tip and place your pliers
beneath the connector so that it doesn’t fall off while
you’re soldering it.
Step 19
–
Li-Po charger board
For mounting the TP4056 Li-
Po charger board, you’ll need to make use of those
tiny excess cut-off
leads we’ve told you to save on step 3
.
Pick four of the longest leads from the pile of excess leads and insert them
through charger’s and PCB’s contacts and
bend them before
soldering.
You need to solder the contacts both on the top and the bottom side
of your MAKERbuino in order for the charger to work properly.
Electronics 101: This way of adding stack-on PCBs to the main PCB is
called the “child board design”. Boards stacked onto the main PCB
are called the “child boards”.
