AUDIO_CONTROLLED_SWITCH

Published:2009/6/24 3:22:00 Author:Jessie | From:SeekIC

The audio-controlled switch combines a pair of 741 op amps, two 2N222 general-purpose tran-sistors, a HEXFET, and a few support components to produce a circuit that can be used to turn on a tape recorder, a transmitter, or just about anything using sound.



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