Institute Newton C. Braga

Circuit Bench

18 W Oscillator with 4001 (CB24353E)
This alarm oscillator was found in the December 1974 issue of Radio Electronics magazine. The...
5 to 10 MHz VFO (CB20381E)
This variable frequency oscillator (VFO or OFV) was obtained in an old Motorola documentation. The integrated...
Touch Switch (CB6449E)
This resistive sensor was found in a 1969 US documentation. The circuit uses transistors of the...