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 2 Hz relaxation oscillator was found in a 1970 EEE. The circuit uses transistors from the era...
With the use of precision resistors and capacitors, this circuit with programmable unijunction transistor...
With this circuit it is possible to accelerate the triggering of a relay. The capacitor can have...