We found this circuit in a Japanese publication in 1967. The circuit consists of a 15 W audio amplifier with germanium transistors including a voltage indicator power supply.
This circuit, found in 2002 documentation, triggers LEDs when a phone call is received. The LEDs...
It is an ideal assembly to be implemented as work by students of digital electronics courses, as...
This control circuit for direct current motors uses a 741 and an operational one of unusual power...