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 |

Divider by 17 (CB12132E)
This circuit was obtained in a 1982 magazine. In it we have the way to connect two integrated...
Bilateral Converter EIA232 / 485 With Optical Isolation (CB17681E)
This circuit (2009) has driver control through the RTS signal or in automatic mode through the...
Shield for triac MOC3010 (CB25349E)
This shield circuit was obtained from Radio Electronics magazine, July 1990. The triac is load and...