This circuit turns off a load after an interval of 8 to 80 seconds adjusted on the potentiometer. The circuit is from a Radio Electronics June 1970. The time depends on C1 and can be changed.
This circuit was found in many record players with crystal phono pickups. The output power is 800...
This mixer or audio mixer uses common FETs that can be the BF245 or MPF102 and an operational...
This circuit was found in July 1986 Radio Electronics magazine. The maximum current is 1.5 A. The...