Institute Newton C. Braga

Circuit Bench

Capacitive Antenna (CB13646E)
This circuit was obtained in a manual for radio amateurs from 1975. It is a circuit that allows the...
Scanner squelch (CB9424E)
Found in Popular Electronics from the 90s, this circuit mutes a scanner's speaker in the absence of a...
555 Driver (CB10850E)
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...