Institute Newton C. Braga

Circuit Bench

Noise suppressor for triacs (CB6740E)
A 100 nF capacitor and 100 uH inductor form this circuit suggested by General Electric in a 1964...
Optical control notch filter (CB6717E)
This 1967 Raytheon circuit uses an optical coupler of the era and has a range of 800 to 200 Hz....
Logical Level Indicator (CB16958E)
We found this circuit in a 1990 documentation. It works with the power of the digital circuit...