Institute Newton C. Braga

Circuit Bench

Transistor voltmeter (CB23631E)
With this circuit published in Radio Electronics magazine in September 1959, it is possible to use a...
Variable Active Bandpass Filter 741 (CB5197E)
This variable bandpass filter was found in an American 1980s documentation. The power supply must be...
Analog-to-Digital Converter with the 4066 (CB188E)
A four-bit analog-to-digital converter [A/ D or ADC] can be built using one 4066. An 8-bit...