Institute Newton C. Braga

Circuit Bench

Stereo Preamplifier (CB14935E)
The integrated circuit used in this stereo preamp is uncommon today, but the circuit can be...
Driver for Nixie Tube (CB6682E)
This circuit was found in a 1967 General Electric manual. It is intended for the control of high...
Carbon Microphone Preamplifier (CB14801E)
Carbon microphones are no longer used in most projects. However, finding one in the scrap metal, it...