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Project #453
OBJECTIVE: Build a circuit that records the sound of the motor
spinning.
Placing the motor (M1) (with the fan attached) next to the microphone
(X1) enables you to record the sound as it spins. Turn off and then turn
on the switch (S1). After the two beeps, turn off the switch (S1) again.
Remove the jumper wire and press the press switch (S2) to hear the
recording.
Motor Sound
Recording
Project #454
OBJECTIVE: To build a circuit that generates sound as a motor
is spinning.
When the motor (M1) is spinning, the circuit will light an LED and you
will hear the sound of the motor from the speaker (SP).
Turn off the switch (S1). There is no power; the LEDs and motor are
off. Now turn on the switch (S1). Only the green LED (D2) lights,
indicating power to the circuit. Press the switch (S2). The motor
spins, the red LED (D1) lights, and you hear the motor sound from the
speaker (SP).
Motor Sound Indicator
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