learn to solder:
Robot Badge Kit
Cat no.
KM1098
5
Testing &
troubleshooting:
DOUBLE-CHECK
Before you apply power,
it is good practice to
double-check that you
have the components
in the right spot and
soldered correctly.
Make sure the IC,
electrolytic capacitor,
buzzer, and the two LEDs
are in the circuit board
the correct way. If not,
you need to de-solder the component and solder it in the
right way. See our instructions opposite about de-soldering.
Look closely at all of your solder joints and make sure they all
look like “volcanos” as we described on page 2. If not, apply
the soldering iron again and add a tiny bit of solder to make
the solder joint reliable. Make sure all of the component legs
are trimmed so they are not short-circuiting each other.
Finally, make sure you don’t have any bridged solder joints
where one solder joint has joined with another because
of too much solder. If this is the case, follow the de-solder
instructions opposite to remove the solder, and then solder
again.
POWERING IT UP
Insert a CR2032 battery (We
recommend, SB2522) and your
Robot’s LEDs should light up and
buzzer sound when you touch
the round touch plate on the
front of the Robot’s circuit board
with your finger.
TROUBLESHOOTING GUIDE
If your badge doesn’t work:
1. Make sure your battery is not flat. Try using a fresh battery.
2. Recheck all of your solder joints (review the soldering
guide on page 2)
3. Make sure you don’t have any short-circuits because of
component legs touching or solder pads on the circuit
board bridged together.
If the red LEDs are dim or the buzzer isn’t that loud, make
sure you are using a fresh battery. If the LED is still dim with
a fresh battery, double-check that you inserted the resistors
into the right spots. If you still can’t get the badge to work,
you can show the circuit diagram (shown below) to an
electronics enthusiast who can help fault-find it with you.
DE-SOLDERING
In the unfortunate event that you need to remove a
component, you need to de-solder it from the circuit board.
You will need asolder sucker (We recommend, TH1862) or
Desolder braid/Solder Wick (We recommend, NS3020) to do
this. If you are using a solder sucker, heat the solder joint to
melt the solder and use the pump to suck the solder away. If
you are using de-solder braid, you place that over the solder
joint, apply heat, and you will see the solder be soaked up
into the braid. Insert the component the correct way and
solder again.
1M
R3
100K
R1
1KΩ
R4
8
4
3
5
1
6
7
2
C1
+
220Ω
R2
C2
0.1μF
10μF
Q1
VCC+
/RES
CON
GND
+OUT
TRE
TRI
DIS
3V
