Found in a 1965 Electronic Design the purpose of this circuit is to control the gain of a stage by applying an external voltage. The circuit operates at high voltages.
This circuit only works with resistive loads, such as incandescent lamps. The integrated circuit used...
When a model train crosses a level crossing, interrupting the light on the sensor, this circuit...
This motor control using transistors was found in a recent English publication. The circuit is for...