Institute Newton C. Braga

Circuit Bench

Negative ion detector (CB21001E)
This tube circuit was found in the magazine 73 for radio amateurs in an issue from the 1980s. Note...
MW direct amplification radio (CB18314E)
This simple radio circuit was obtained in a Japanese publication in 1967. The circuit uses...
Universal Logic Tester (CB24671E)
This logic tester circuit was published in the November 1980 issue of Radio Electronics magazine. The...