Institute Newton C. Braga

Circuit Bench

Calculator to timer converter (CB9601E)
This circuit allows you to use a calculator as a timer by directly activating a sum key with...
Capacitive SCR Shutdown (CB19273E)
In the figure we have the way to reset (turn off) an SCR using a push button switch on a...
Two-Tone Humidity Sensor (CB25347E)
We found this circuit in the July 1990 issue of Radio Electronics magazine. The frequencies are...