Institute Newton C. Braga

Circuit Bench

Alternating Tone Siren 555 (CB25340E)
We found this alarm circuit in a Radio Electronics magazine from July 1990. The power transistor must be...
Two FETs FM Transmitter (CB14879E)
The circuit shown is from a 1993 documentation. It uses two FETs in an oscillating configuration that...
Synchronized Adjustable Sinusoidal Oscillator (CB18248E)
This circuit, which can be used on percussion instruments, has the oscillation point adjustment made in...