This circuit was found in American documentation from the 90's. The circuit applies to any operational. The power supply can be between 5 and 15 V depending on the operational.
This circuit is from a 1975 magazine, but it is still current as all components are common. The...
This PNP transistor power stage was found in the May 1969 issue of Radio Electronics magazine. The circuit...
This circuit is suitable for incandescent lamps but can be adapted to work with LEDs. The circuit is...