Institute Newton C. Braga

Circuit Bench

Transistor Voltmeter (CB1396E )
This voltmeter has an input resistance of 200 M ohms (47 M ohms resistors can be used in series to...
Car Alarm Simulator (CB18821E)
It is a simple blinker that simulates the action of an alarm when installed on the dashboard of a...
Opto relay using two couplers (CB7414E)
This circuit was found in General Electric documentation from the 1980s. The circuit uses couplers...