Elenco LIGHT - Manual (Page 50)

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Project 92 Funny Speed Motor
Build the circuit as shown and turn on the switch
(S1). The color LED (D8) is blinking and the motor
(M1) spins at different speeds. Try this circuit with the
glow fan on the motor, and without the fan.
The motor is controlled by the color LED using the
transistor (Q2). If you remove the color LED from the
circuit then the motor will not spin.
Project 93
Funny Speed
Motor with
Light
Use the preceding circuit, but
add the red LED (D1) across
points A & B (“+” to A). This
adds another blinking light.
Project 91 Triple Blinker
Build the circuit as shown and turn on the switch (S1). Three LEDs (D1,
D6, and D8) will be blinking.
The red and white LEDs are controlled by the color LED using the
transistor (Q2). If you remove the color LED from the circuit then the
other LEDs will not blink.
!
WARNING: Moving parts. Do not
touch the fan or motor during
operation.
In this circuit the color LED is
powered by one set of batteries, and
the motor is powered by different set.
This was done because the motor
produces electrical pulses as it spins,
and these pulses can confuse the
color LED.