Institute Newton C. Braga

Circuit Bench

Isolated DC to DC (CB20666E)
Found in a magazine 73 for radio amateurs of the 90s, this circuit converts a continuous voltage and...
Temperature Control (CB1363E )
The sensor of this circuit is an NTC with a resistance between 200 and 1000 ohms. The resistor R1 must...
Dual Temperature Control (CB15791E)
This circuit controls two relays from a single temperature sensor. The first fires when the...