Institute Newton C. Braga

Circuit Bench

Balance Indicator (CB17570E)
This circuit, which uses a VU-meter with zero in the center of the scale, which is not easy to...
1 kHz Band Pass Filter with Two Operational LM3900 (CB14190E)
We found this circuit with a Q factor of 25 in the Linear Applications Handbook by National...
Electronic fuse (CB8352E)
Found in a 1968 Motorola manual, this DC circuit uses components from the era. The circuit fires in...