Institute Newton C. Braga

Circuit Bench

Unijunction Time Base (CB19138E)
We found this time base of 0.1 to 90 seconds in a circuit manual from the 90s. The single-use...
Negative Power Source with Increased Voltage L79xx (CB15173E)
The L79xx is the SGS version of the 79xx. The circuit was obtained in the SGS manual of linear...
High power siren (CB9084E)
Found in na 1980’s English magazine, this circuit produces a strong modulated tone reproduced on a...