Institute Newton C. Braga

Circuit Bench

Slave flash (CB8112E)
This circuit uses a small photocell to trigger an auxiliary flash. The circuit is from a 1991 PE...
Capacitance Bridge (CB10666E)
This circuit is from a Popular Electronics from July 1990. The magazine no longer exists, but the...
Call indicator (CB9291E)
This telephone circuit was found on a 90's EDN. It keeps a flashing LED to indicate that there was a...