This squelch circuit is placed at the input of the single receiver audio amplifier stage. Its purpose is to silence background noise. The circuit is from an 80's documentation.
Found in a 90s Popular Electronics, this circuit checks if a remote-control transmitter is...
This circuit for a decorative robot was found in the April 1988 Radio Electronics magazine. The...
This siren circuit was found in a Popular Electronics from March/April 1969. We can easily...