Institute Newton C. Braga

Circuit Bench

Peak Signal Indicator (CB25966E)
This LED indicator circuit uses an LM339 comparator. The circuit was found in the January 1995...
Overvoltage Protection for Logic Circuits (CB5885E)
This circuit is from an 80's documentation. Equivalent transistors can be used. The circuit is...
Selective frequency receiver (CB8863E)
We found this circuit in a 1967’s Electronics World. The circuit can be made with modern...