Using a 4-layer diode, an unusual component today, this circuit was found in an American documentation from 1964. The circuit can be tested using a diac.
This frequency divider circuit that generates a ladder-shaped signal was found in the June 1968...
This circuit is from American documentation. The components used are still common. The power...
When S1 is in 1, the circuit operates with of half the total power applied to the load. When in...