This circuit is from a 1974 publication by Motorola. The unijunction may be 2N2646 and bipolar BC558 and BC548. The pulse duration depends on the capacitor.
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...