Institute Newton C. Braga

Circuit Bench

120-second timer 555 (CB25500E)
In the figure we have a simple timer with the 555 feeding a relay directly. The circuit is from...
Absolute Value Amplifier (CB19771E)
This circuit, in addition to providing an output that corresponds to the absolute value of the...
DC Motor Control (CB12292E)
This circuit is from 1977 documentation, but can be assembled with BC548 for Q1, Q2 and Q4, BC558...