Institute Newton C. Braga

Circuit Bench

Decimal Ring Counter (CB6617E)
Obtained from a 1969 documentation, this circuit can operate at frequencies up to 500 Hz, counting up...
Field Strength Meter (CB4521E)
I got this circuit from a magazine in 1967. The magazine no longer exists, but the circuit that...
Tool Torque Control (CB5422E)
This circuit can be used with common drills connected to the 110 V network. With change of R1 and...