Post project 43: Noise Detector

October 3, 2014 | 16:43
Post project 43: Noise Detector
Post project 43: Noise Detector
This simple circuit detects noise in a room and activates a beeper if the noise exceeds an adjustable threshold level.
 
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Among other things, this circuit can be used as a baby alarm, but it is also suitable for other applications such as monitoring the noise level during a party. The idea is that the circuit board and the microphone are placed in the room to be monitored, while the beeper is placed in another room.
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