Institute Newton C. Braga

Circuit Bench

Metal detector receiver (CB22457E)
Found at Popular Electronics this receiver is used with a transmitter for quadrature-coil signals....
Touch Switch (CB17275E)
Versions of this circuit have appeared several times on this site and even in this section. This...
Transistorized Amplifier (CB16786E)
This circuit provides a few watts of output and can be used in the car as an auxiliary amplifier....