Institute Newton C. Braga

Circuit Bench

Programmable sinusoidal oscillator (CB24624E)
This circuit was found in the March 1980 issue of Radio Electronics magazine. It is based on the...
Linear inductance meter (CB7948E)
Using a standard multimeter, this circuit from a 73 magazine for radio amateurs provides an output...
Positive Comparator (CB24963E)
The circuit with a common operational amplifier uses a zener as a reference. The circuit is from...