Institute Newton C. Braga

Circuit Bench

Transistor Replacement Box (CB21670E)
The idea of this circuit from a 1960 publication is simple: we can switch the transistor being...
Locked Code Switch (CB18038E)
This project makes use of a technology without many digital components and that can be easily...
SCR Light Alarm (CB12197E)
When the light falling on the sensor is cut off, the SCR fires, powering the lamp. Remember that...