This two-transistor circuit was found in a 1966 US documentation. The power transistors are of the time. The system is intended for cars with contact breaker.
This frequency divider with SUS was found in General Electric's 1967 documentation. Similar...
This traditional oscillator uses two complementary transistors to produce low frequency signals....
This charger for a maximum current of 15 A was obtained from an American 80's schematics. The triac must...