Institute Newton C. Braga

Circuit Bench

12 V Motor Control (CB10584E)
This circuit is from a 1978 magazine Radio & Electronics Constructor, but it can be assembled with...
Tube negative ion generator (CB21002E)
This circuit was found in an old American magazine for radio amateurs. The circuit is based on a...
Sound Operated Flash (CB10379E)
This circuit was found in a 1977s English magazine. The SCR can be the TIC106 and the transistor the...