Institute Newton C. Braga

Circuit Bench

1 kHz Bi-Quad Band Pass Filter LM3900 (CB14191E)
This filter with a Q factor of 50 was found in the Linear Applications Handbook by National...
1 MHz TTL Oscillator (CB19529E)
This crystal-controlled circuit was found in European documentation from the 1980s. The circuit can...
Adjustable Power Supply Source with Timer (CB16503E)
This source circuit, published in 1988, incorporates a timer with integrated circuit 555. In this...