SCR photo control (CB8276E)

This circuit is from a 1968 Electronics World. It acts directly on a high voltage alternating current relay. The sensor can be a common LDR.

| Clique na imagem para ampliar |

Cascading the 4017 (CB211)
Here we show how two 4017s can be cascaded to count above 10. The circuits are driven by a square...
Photo relay (CB20885E)
The circuit in the figure represents a typical application of a phototransistor exciting a relay...
Watch Battery Rejuvenator (CB17070E)
This circuit, in fact, what it does is a reactivation of the batteries through a brief pulsating...