Institute Newton C. Braga

Circuit Bench

3 Transistors MW Receiver (CB20277E)
The FET can be a BF245, and the other transistors can be the BC548 and BC558 in this simple AM...
Telephone interface (CB8663E)
Following the American FCC rules, this 90s Radio Electronics circuit shows how to use a...
Darlington Photo Sensor (CB16106E)
The circuit shown in the figure is a more sensitive version of the previous one (CB16105E). Two...