Institute Newton C. Braga

Circuit Bench

15W Hybrid Amplifier (CB17493E)
This amplifier, common in 1986, uses a hybrid integrated circuit that can offer some difficulty to obtain...
Low Voltage Test (CB22158E)
This is a simple voltage tester for voltages from about 2V to about 15V with the indicated...
Signaling alarm (CB20532E)
This circuit was found in a publication from the 50's. The circuit uses germanium transistors of...