Institute Newton C. Braga

Circuit Bench

Amplitude Modulated RF Amplifier (CB15007E)
This circuit was found in a Poptronics of the 90's. The FET is double-gate, and the frequency...
Powerful Fire Siren (CB17503E)
This circuit was found in a 1986 publication. However, it can still be easily assembled, as the...
Locator transmitter (CB21444E)
This small locator transmitter was found in old Radio Shack documentation. The transistor could be a...