Data Sheet

Troubleshooting (Adult supervision recommended)
-8-
Elenco
®
is not responsible for parts damaged due to incorrect wiring.
Basic Troubleshooting
1. Most circuit problems are due to incorrect assembly, always
double-check that your circuit exactly matches the drawing for it.
2. Be sure that parts with positive/negative markings are
positioned as per the drawing.
3. Be sure that all connections are securely snapped.
4. Try replacing the batteries.
Advanced Troubleshooting
If you suspect you have damaged parts, you can follow this
procedure to systematically determine which ones need replacing:
1. Snapino
TM
module (U31 - partial test, see step 6 for full test),
9V battery holder, and USB cable: Install a 9V battery into the
battery holder, turn on its switch, and plug the holder into the
Snapino
TM
module; a green “ON” light and another light on the
Snapino
TM
module should be on. Remove the 9V battery holder
and connect the USB cable; the same lights on the Snapino
TM
module should be on. If the Snapino
TM
lights do not come on in
either case then Snapino
TM
is damaged, if they only come on for
one power source then the other power source is damaged.
2. Red LED(D1), green LED(D2), and red/yellow LED(D10):
Place the red LED across the “5V OUT” and “GND” snaps on
the Snapino
TM
module (U31), with LED “+” to 5V OUT; the red
LED should light. Repeat for the green LED. Repeat for the
red/yellow LED but test it in both directions. If some LEDs work
but others do not then the ones that did not work are damaged.
If no LEDs work then the Snapino
TM
module is damaged.
3.
White jumper wire and red snap-to-pin wire: Use this mini-
circuit to test the white jumper wire, the LED should light.
Replace the white jumper wire with
the red snap-to-pin wire (snap it
on the LED, then touch the
pin end to the GND snap on
the Snapino
TM
module
(U31)) to test it.
4.
Snap wires: Use this mini-
circuit to test each of the
snap wires, one at a time.
The LED should light.
5.
Press switch (S2), 10kW resistor (R4), and phototransistor
(Q4):
Build project #1 and push the press switch, if the red LED
(D1) doesn’t light then the press switch is bad. Replace the press
switch with the 10kW resistor; the LED should be much dimmer
now but still light. Replace the 10kW resistor with the
phototransistor (“+” on right) and vary the amount of light shining
on it; more light should make the LED brighter.
6. Snapino
TM
module (U31 - full test): Use project 15 to test it.
ELENCO
®
150 Carpenter Avenue ● Wheeling, IL 60090 U.S.A.
Phone: [phone] ● Fax: [phone]
e-mail: [e-mail] ● Website: www.elenco.com
You may order additional / replacement parts at:
www.snapcircuits.net
SCSNAPINO_Manual_112816.qxp 12/30/16 2:00 PM Page 9