Institute Newton C. Braga

Circuit Bench

Modern Crystal Radio I (CB932E)
This modern XTAL radio replaces the galena crystal for a germanium diode as the 1N34 or...
Word Simulator (CB20006E)
This circuit generates a signal that simulates the waveform of the spoken word. Its purpose is to...
Extension Bell (CB15685E)
With this circuit it is possible to use a DC buzzer (not a transducer) as an extension of the...