Institute Newton C. Braga

Circuit Bench

Dual 741 Preamplifier (CB26278E)
We found this circuit in a Radio Experimenter Handbook from the 90s. The circuit uses 741 op amps...
Resistance ratio detector (CB7273E)
This circuit was suggested by an Electronic Design from the 90s. Its purpose is to detect...
Bilateral Converter EIA232 / 485 With Optical Isolation (CB17681E)
This circuit (2009) has driver control through the RTS signal or in automatic mode through the...