Institute Newton C. Braga

Circuit Bench

20 W per channel Amplifier (CB18512E)
In the figure we have one of the channels and the source of a good stereo amplifier of 20 W per...
Low Pass Ative Filter 741 (CB853E)
This is a simple configuration for a low-pass filter using a 741 operational-amplifier. Other...
Crystal Test (CB12277E)
We found this circuit in a 1976 publication. The transistors can be BC547 or 2N2222. Crystals up...