Sound Activated Toy

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A microphone drives circuits which run a small electric motor.

This circuit makes a flower bop to the beat of music. The flower stem contains a crooked wire which is spun by the motor. The circuit is a microphone driven peak-detecting one-shot and works very well. The microphone is in a sponge mount to insulate it from the vibration of the running motor. Similar circuits are used to drive rock'n coke cans:

Circuit Diagram aka Schematic reverse engineered from circuit board

This is a haloween toy which spins a skeleton or goul in response to a loud noise. The microphone triggers a monostable which makes the geared motor run for a few seconds. Note that when the one shot becomes active it disables the microphone so that the circuit can reset itself:

Circuit Diagram aka Schematic reverse engineered from circuit board

Safety, accuracy and completeness of information provided herein is not guaranteed,
so be inspired by it but do not use it as a basis for experimentation or other actions.

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