Institute Newton C. Braga

Circuit Bench

Power Stage with TIP31 (CB995E)
The purpose of this circuit is to provide a few watts of power to a heavy speaker with good sound...
Simple RF wattmeter (CB3892E)
This circuit, found in US documentation, can measure the power of transmitters up to 10 W, given...
Automotive Tachometer (CB13706E)
This circuit was obtained in a 1975 documentation. It is intended for old vehicles that still use...