35 W Amplifier (T359E)

This class AB2 amplifier was obtained in a 1937 RCA tube manual. The circuit includes the dual high voltage power supply.

Comarator Isolated Interface (CB4593E)
In the figure we have an interface using an optical coupler and the comparator LM339 or any...
Electronic ignition (CB23939E)
This circuit for cars with mechanical breakers (contact breakers) was found in the April 1969...
LED Polarity Indicator (CB17403E)
This circuit can be used to show the direction of current flow in semiconductors, such as LEDs....