This PA or Public Address amplifier with a few watts of power was found in the March 1986 Radio Electronics magazine. It uses two LM380 ICs in bridge mode for higher power.
This circuit, which appears at other points on this site, can be designed with both 4011 and 4001...
This traditional SCR flip-flop configuration is from an American publication from the 1970s. The...
This circuit is from a 1980s Signetics documentation. The circuit separates the modulation signal from a...