Audio Controlled Mains Switch Circuit

Posted on Mar 22, 2013

This circuit will switch off the line supply to audio or video equipment if there has been no input signal for about 2 seconds. SI provides manual operation and S2 acts as a reset. This circuit allows for time to change a tape or compact disc.

Audio Controlled Mains Switch Circuit
Click here to download the full size of the above Circuit.

About 50 mV of audio signal is necessary.

Leave Comment

characters left:

New Circuits



Popular Circuits

Sobriety Tester with LM3914
50 Khz center frequency optical transmitter
Fm Radio Transmitter Circuit
20 Watt Power Amplifier
how to build cell phone controlled door
Muti-channel audio mixer circuit based on LM3900 IC. Four channels
24 Ghz
Fridge Door Alarm Schematic 2nd Version
Precision QRP Transmitter
One way to prevent reverse polarity of the DC power supply circuit