This circuit was found in a 1965’s General Electric documentation. It is intended for low voltage brush motors. The SCR must be according to the engine controlled.
The oscillator shown generates a signal in the 4.5 MHz band and can be used for audio modulation of TV...
With this circuit it is possible to adapt the input of a common analog multimeter, making it...
This metronome circuit was found in an American 1980s documentation. The circuit uses the 4001...