Institute Newton C. Braga

Circuit Bench

Metal detector (CB7959E)
Found in a 90’s 303 Circuits, this circuit uses components that are still common and has a common...
Old Low Power Stereo Amplifier (CB12858E)
This circuit makes use of germanium transistors, providing a fraction of a watt power. It was...
Power control (CB23586E)
This circuit was found in Radio Electronics magazine from January 1959. The power transistor must...