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.
This digital mixer uses CMOS integrated circuits. The circuit was published by us in a magazine...
This 6 V battery charger was found on a 1987 Hands On Electronics. Rc determines the charging...
This circuit regulates the output voltage of a 78xx according to the light incident on the sensor....