Institute Newton C. Braga

Circuit Bench

Two-tone oscillator (CB9071E)
This circuit was found in a 1965 Radio Shack documentation. The transistors are from that time....
20 kHz ring counter (CB6138E)
We found this circuit in an old General Electric documentation. In fact, PUTs are not common...
Triac Two Power Switch (CB12323E)
This circuit is from a 1967 publication, but it can be implemented with any Triac of the TIC...