Institute Newton C. Braga

Circuit Bench

Touch Control Using Triac (CB13296E)
One touch on S1 and the circuit turns on. With a tap on S2 it turns off. This is the purpose of...
VHF Signaling Transmitter (CB21308E)
Found in a magazine 73 for radio amateurs from the 90's, this transmitter sends location signals in...
Three transistor MW radio (CB18319E)
This simple 3-transistor radio with earphone was found in a 1967 documentation. The circuit uses...