Institute Newton C. Braga

Circuit Bench

XR2208 AM Modulator (CB24547E)
We found this circuit in the April 1978 issue of Radio Electronics magazine. The power supply must...
Telephone recorder (CB9236E)
This circuit memorizes through an LED indicator if your phone was used during your absence. The...
TTL Optocoupler (CB17021E)
This circuit is intended to trigger a TTL door or flip-flip from a signal coming from an SCR....