Institute Newton C. Braga

Circuit Bench

Pre selector with varicap tuning (CB9172E)
This circuit for the medium wave range was suggested by a Popular Electronics from the 90s. The...
Battery Charger (CB16778E)
The adjustment of the maximum load voltage is made in the trimpot. The circuit is from 1994...
Emergency Light (CB506)
This simple circuit connects in external battery to a load when the AC Power line fails. S1 can be...