This circuit is intended for detecting 3 levels power grid voltage, and it can be adapted to operate with the most diverse voltages. The circuit uses neon indicator lamps.
The 10 W power is obtained with a load of 2 ohms. The integrated circuit must be mounted on a good...
This TTL circuit was found in the February 1973 issue of Radio Electronics magazine. The power...
This circuit was originally designed for testing crystals used in color televisions, but it works...