Institute Newton C. Braga

Circuit Bench

Light Alarm (CB10330E)
This circuit was obtained in a 1985s English magazine. The circuit can still be assembled with...
Variable Power Supply with the 741 (CB12288E)
This configuration of variable voltage regulator from 0 to 12 V with maximum current of 50 mA was...
Crystal Calibrator (CB24238E)
This circuit for generating precise reference signals was found in the April 1973 issue of Radio...