sound detector tone decoder

Posted on Aug 23, 2012

This circuit is designed to trigger on a 1 khz tone. to change this frequency - refer to the table below, then change the resistor and capacitor values accordingly.

sound detector tone decoder
Click here to download the full size of the above Circuit.

all resistors are 5 or 10 percent tolerance, 1/4-watt all capacitors are 10 percent tolerance, rated 35 volts or higher

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