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33
Project 58
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.
If desired add the red LED (D1) across points A & B (“+” to A). This adds
another blinking light.
Project 57
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.
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.
!
WARNING: Moving parts. Do not touch the fan or
motor during operation. Do not lean over the motor.
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