Institute Newton C. Braga

Circuit Bench

Dual Power Supply with 9 V Battery (CB1344E )
The operational amplifier of this low current source may be any of the JFET type. The output...
Two-Digit Thermometer (CB24520E)
This circuit was found in the September 1977 issue of Radio Electronics magazine. The power supply...
Dimmer with triac (CB26092E)
We recommend adding a 470-ohm resistor in series with the potentiometer in this dimmer circuit...