Institute Newton C. Braga

Circuit Bench

Ultrasonic repellent (CB8103E)
This circuit is from a PE Hobbyst Handbook from 1991. The integrated circuit is a common 555 and...
Emergency Light (CB1561E)
With the configuration shown in the figure, a common 12 V lamp lights up when light no longer...
Bargraph Peak Detector LM3915 (CB14385E)
This circuit was obtained in the National Semiconductor Linear Applications Handbook of 1994. The...