volumeter
Source: InternetPublisher:containsmachine Keywords: Amplifiers power supplies other power supply circuits audio Updated: 2021/04/15
In this circuit, the amplifier IC1-a provides LDR amplified signals (photoresistors) of different values from 40 to +40dB and the LDR is rectified by the voltage follower IC1-b and the rectifier bridge D1~D4 to drive the audio.
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