Field strength meter (CB7358E)

This tuned circuit was found in a 1966 Electronic Circuit Handbook. The transistor can be any modern general-purpose equivalent.

| Clique na imagem para ampliar |

Different Crystal Radio (CB933E)
This different configuration for a crystal galena radio or modernized since a diode is used, has a...
Flashing Timer Switch (CB16959E)
This circuit is from 1990 documentation. When we press D1 the lamp remains on for a time interval that...
SCR Test your Nerves (CB12205E)
This version of the test lights a lamp when the ring touches the tortuous wire. The SCR can be the...