Institute Newton C. Braga

Circuit Bench

Humidity Alarm (CB18478E)
This conventional humidity or water alarm circuit was found in an English documentation from 1974....
Pierce Crystal Oscillator (CB3847E)
The frequency of this traditional crystal oscillator (XTAL) depends only on the used crystal,...
Differential Temperature Switch (CB16115E)
This circuit of industrial applications has an interesting characteristic: the relay is only...