This circuit was obtained in a 1978 publication. The supply can be symmetrical from other voltages. Frequency can be changed by changing the capacitors.
The frequency of this pulser depends on the capacitor and the characteristics of the relay. The...
We found this circuit in the May 1990 issue of Radio Electronics magazine. The circuit is powered by...
This circuit of old American documentation (1965) can be applied to any transistor. | Clique na...