We found this circuit in the 1983 Radio Electronics Special projects magazine. The components are common, and the circuit drives a relay. The power supply must be isolated.
With this name, we find a photorelay in a publication from 1966. The transistor is made of...
This 6-transistor Japanese radio from the 1960s used germanium transistors and had an output power...
The waveform generated by this circuit produces a sound similar to that of a bird. The circuit is based...