This circuit is used to protect an amplifier from excessive power output that would cause problems for the speakers. The circuit is from the January 1985 issue of Radio Electronics magazine.
This circuit uses an audio output transformer found in old transistor radios. Power output is...
Found in a 1967 Electronics World, this circuit uses unusual components today. The transformer has a high...
This circuit consists of a charge pump with positive input and negative output. We find it in a...