Conventional Astable (CB24839E)

This common circuit is from September 1984 Radio Electronics. The transistors are general purpose, and the frequency is given by the capacitors.

| Clique na imagem para ampliar |

Latching Photo Sensor (CB25476E)
This simple sensitive circuit was suggested in a July 1992 Radio Electronics issue. The relay is a...
Cable finder (CB7135E)
Found in an old English publication and in other parts of this website in different versions, this...
Self-timer (CB4456E)
This circuit can keep a set of lamps on for up to 1 minute, time given by C2 and R2 that can be...