Institute Newton C. Braga

Circuit Bench

Small Stethoscope (CB12617E)
This circuit, from an old publication from the 1970s, can be made with silicon transistors like...
Ultrasonic remote control transmitter (CB8397E)
Found in a 90s Popular Electronics, this circuit excites a 40 kHz ultrasonic transducer. The...
1 kHz Oscillator with Filter (CB25581E)
This circuit with signal acceptance filter was found in the June 1993 Electronics Now magazine. Other...