Elenco Snaptricity® - Manual (Page 69)

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Motion Enhancer Project #59
Educational Corner:
Electric Paths
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There is a small current through the motor, this helps to
spin in one direction but resists spinning in the other
direction.
The slide switch adjusts the motor current, position B will
not enhance/resist the spinning as much as position C.
Description
Give the motor shaft a spin with your finger. Notice how
easily it spins, in both directions.
Now connect one end of the red jumper wire to the 3-snap
wire, and hold the other end to the center spring in the
battery holder (B3). Spin the motor shaft with your finger
again, while still touching the red jumper snap to the spring
in the battery holder. In one direction (clockwise) it will spin
more easily than before, but less easily than before in the
other direction (counter-clockwise).
Operation
Build the circuit. Leave the fan off the motor (M1). Set the
slide switch (S5) to position C. Leave the red jumper wire off
for now.
Assembly