Institute Newton C. Braga

Circuit Bench

Relay Switch (CB25864E)
This CMOS 4001 oscillator alternately turns the relay on and off at times set by R2. The circuit is...
20 W amplifier TDA2003 (CB19166E)
This is a factory setting that appears on many commercial devices and at various points on this...
High Q Crystal Filter (CB19698E)
For the 1 MHz frequency, the pass band of this filter is only 120 Hz wide. The filter is suitable for...