This circuit found in an American documentation from 1964, alters the duration of a pulse and can operate at frequencies up to 10 MHz. The transistors are from that time.
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...