Found in a 1968 EEE, this switch controls a high-power load from an audio signal. The current is determined by the type of SCR.
In the original 1992 application, this passive circuit was intended for use in the car. At that...
This 1995 circuit uses an audio amplifier that is no longer common today. However, other...
This circuit is from an 80's documentation. The integrated circuit is from the time and the...