If you suspect you have damaged parts, you can follow
this procedure to systematically determine which ones
need replacing:
1.
2.5V lamp (L1), motor (M1), speaker (SP2), and battery
holder (B1):
Place batteries in holder. Place the 2.5V lamp
directly across the battery holder, it should light. Do the same
with the motor (motor + to b), it should spin to the right
at high speed. “Tap” the speaker across the battery holder
contacts, you should hear static as it touches. If none work,
then replace your batteries and repeat, if still bad then the
battery holder is damaged.
2.
Jumper wires:
Use this mini-circuit
to test each jumper wire, the lamp
should light.
3.
Snap wires:
Use this mini-circuit
to test each of the snap wires, one
at a time. The lamp should light.
4.
Slide switch (S1) and Press switch (S2):
Build project #1, if
the lamp (L1) doesn’t light then the slide switch is bad. Replace
the slide switch with the press switch to test it.
5.
100
W
resistor (R1) and color LED (D8):
Build project #2
except initially use the speaker (SP2) in place of the resistor,
the color LED should light. Then replace the speaker with the
resistor; the LED should still light.
6.
Alarm IC (U2):
Build project #110, you should hear a siren.
Then make the variants in projects 111-113 to get the sounds
described there.
7.
Music IC (U1):
Build project #6 . Turn on the switch (S1). A
tune should play for a short time and then stop. Push the press
switch (S2) and music should play until you release S2. Spin
the motor (M1) top with your fingers and you should hear a
short tune.
8.
Space war IC (U3) and phototransistor (Q4):
Build project
#21 , both switches (S1 and S2) should change the sound.
Then replace the slide switch with the phototransistor, covering
and uncovering it as described in project 22 it should change
the sound.
ELENCO
®
150 Carpenter Avenue
Wheeling, IL 60090 U.S.A.
Phone: (847) 541-3800
Fax: (847) 520-0085
e-mail: [email protected]
Website: www.elenco.com
You may order additional / replacement parts
at:
www.snapcircuits.net
-8-
Advanced Troubleshooting
(Adult supervision recommended)
Elenco
®
is not responsible for parts damaged due to incorrect wiring.
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