Institute Newton C. Braga

Circuit Bench

1 kHz Tuned Filter with the 741 (CB12286E)
In this circuit, from a 1977 publication, we have the traditional version of a filter tuned to 1...
Timeout Compator (CB5078E)
We find this circuit in an American 1980s documentation. Modern equivalent integrated circuits can be...
Light controller (CB7049E)
Found in an old Popular Electronics this circuit can also be adapted to be used as a shield. In...