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.
This circuit was found in documentation from the 90s. Its purpose is to dial a programmed number...
I found this circuit in a magazine Mundo Eletrônico, from the 70s published by my friend A....
This circuit generates a signal rich in harmonics that extends up to close to 1 GHz, serving for...