Institute Newton C. Braga

Circuit Bench

Gain Relay Excitation Circuit (741) (CB11882E)
Signals ranging from a few millivolts to a few volts can be used to excite a relay with this...
455kHz Oscillator (CB21137E)
This oscillator uses a small IF transformer taken from an old transistor radio. FET admits...
Comparator (CB5090E)
The HA2620 integrated circuit used in this comparator is from the 80's, but the setting can be...