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Dave's Circuits
Circuits designed by David Johnson, P.E.

Master Category List - Dave's Circuits
 Last Updated on: Friday, August 29, 2008 02:34 PM

Switch Circuits

Audio Signal Detector Switch
This circuit will activate a transistor switch when it detects at least 50mv peak to peak of an audio signal.  It could be used to turn on a relay, routing the signal to were it is needed.

Click on Drawing Below to view PDF version of Schematic

Circuit Audio Activated Switch Circuit designed by David Johnson, P.E. (June 30, 2006)

Switch Circuits
Master Schematic Category List - David A. Johnson, P.E.
 

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