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 circuit is intended to increase the width of a pulse. The circuit is TTL and can be used as a...
This circuit was found in a 1966 EEE. What it does is it converts the logic levels of 0 V and +4 V...
This circuit open and close the relay in intervals adjusted by the potentiometers. The capacitors...