Institute Newton C. Braga

Circuit Bench

Thermocouple Amplifier CA3140 (CB19298E)
We found this circuit in a publication on operational amplifiers from the 1980s. The circuit does...
DC Current Ammeter (CB19292E)
This ammeter measures currents in 5 ranges from 50 uA to 0.5 A using a 40 uA instrument, which can be...
VU with the 4017 (CB17038E)
This circuit indicates the volume of an audio signal in a different way. The circuit is from 1997...