Institute Newton C. Braga

Circuit Bench

Photo Timed Voice Relay (CB16823E)
This interesting circuit, which can be used as an alarm, was found in a 1997 documentation. It...
High Current Timing Circuit (CB24442E)
This circuit with a voltage comparator is delayed by the capacitor. The circuit drives a power...
Battery Saver (CB7134E)
Found in Popular Electronics from the 90s, this circuit consists of a timer that turns off the...