28 V Lock (CB7236E)

This circuit was found in a 1965 General Electric publication. The circuit can be adapted to operate with other voltage lamps.

| Clique na imagem para ampliar |

Shutdown After 60 Seconds using an UJT (CB12335E)
In this circuit of a 1968 publication the unijunction may be 2N2646 and the transistor BC548. The...
Zener triggering (CB21472E)
The purpose of this circuit is to improve a trigger circuit using a zener diode. The circuit was...
Crystal Radio with filter against Jamming Station (CB934E)
This interesting circuit of the American publication Electronics Handbook Volume XIII 1993 shows a...