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.
Figure bellow shows how a digital frequency divider or counter can be created using the flip-flops containing...
This circuit was found in an ancient American documentation. With it is possible to double the...
This circuit was found in a Popular Electronics from the 90s. The circuit uses general purpose...