Elenco Snap Circuits Motion - Manual (Page 14)

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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:
(Note: Some of these tests connect an LED directly
across the batteries without another component to
limit the current. Normally this might damage the
LED, however Snap Circuits ® LEDs have internal
resistors added to protect them from incorrect
wiring, and will not be damaged.)
1. Color LED (D8), red/yellow bicolor LED
(D10), speaker (SP2), geared motor (GM),
and battery holder (B1):
● Place batteries in holder.
● Place the color LED directly across the
battery holder (LED + to battery +), it
should light and be changing colors.
● Place the red/yellow bicolor LED directly
across the battery holder, in both
orientations. It should light red when the
red side is to battery +, and yellow when
the yellow side is to battery +.
● “Tap” the speaker across the battery
holder contacts, you should hear static as
it touches.
● Place the geared motor directly across the
battery holder; its shaft should spin.
● If none of the above work, then replace
your batteries and repeat. If still bad, then
the battery holder is damaged. Test both
battery holders.
2. Red & black jumper
wires: Use this mini-
circuit to test each
jumper wire, the LED
should light.
3. Snap wires: Use this mini-circuit to test
each of the snap wires, one at a time. The
LED should light.
4. Slide switch (S1) and vibration switch
(S4): Use this mini-circuit; if the LED doesn’t
light then the slide switch is bad. Replace
the slide switch with the vibration switch;
tapping it should light the LED, or the
vibration switch is bad.
5. Light motor (M7): Build project 3. The light
motor should spin and lights in the fan blade
should make a colorful, changing pattern.
Be sure you orient the light motor as per the
drawing.
6. Air fountain (AF): Build project 6, and be
sure you have good batteries. Air blown out
of the top of the air fountain should make the
ball spin around and/or rise into the air.
7. Pivot stand resistors: The pivot stand has
resistors mounted inside; they can be tested
using the mini-circuit shown here. The
red/yellow LED (D10) should be bright and
the color LED (D8) should be very dim,
otherwise the pivot stand is damaged.
8. Adjustable resistor (RV2): Build project
133. Move the resistor control lever to both
sides. When set to each side, one LED
should be bright and the other dim;
otherwise RV2 is bad.
9. NPN transistor (Q2): Build the mini-circuit
shown here. The color LED (D8) should only
be on if the slide switch (S1) is on. If
otherwise, then Q2 is damaged.
10. Tilt switch (S7) : Build this mini-circuit and
tilt it in different directions. D10 should be on
at some tilt angles, D8 should be on at other
tilt angles, and sometimes both lights are off.
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