Elenco Projects 1-101 - Manual (Page 7)

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Advanced Troubleshooting
(Adult supervision recommended)
Elenco ® is not responsible for parts damaged due to incorrect
wiring.
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 (SP), 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 battery +), 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
Ω
resistor (R1) and LED (D1): Build project #7 except
initially use the speaker (SP) in place of the resistor, the LED
should light. Then replace the speaker with the resistor; the LED
should still light.
6. Alarm IC (U2): Build project #17, you should hear a siren. Then
place a 3-snap wire between grid locations A1 and C1, the
sound is different. Then move the 3-snap from A1-C1 to A3-C3
to hear a 3rd sound.
7. Music IC (U1): Build project #74 but use the press switch (S2)
in place of the photoresistor (RP). Turn it on and the LED (D1)
flickers for a while and stops, it resumes if you press and hold
down the press switch. Then touch a 3-snap wire across base
grid points A1 and C1 and the flickering resumes for a while.
8. Space war IC (U3) and photoresistor (RP): Build project #19,
both switches (S1 and S2) should change the sound. Then
replace the slide switch with the photoresistor, waving your hand
over it should change the sound.
9. Whistle chip (WC): Build project #61 and if there is light on the
photoresistor (RP) then you will hear sound from the whistle
chip.
Note: If you have the more advanced models SC-300, SC-500, or
SC-750, there are additional tests in your other project manual(s).
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