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.
The LS4558 integrated circuit is a double 741. The filter response curve is given next to the...
This motor control using transistors was found in a recent English publication. The circuit is for...
This circuit from a 90s Popular Electronics, decodes the old analog TV signal. It works with a...