This diagram from a 1967 documentation shows how to switch high voltage neon lamps with 5V TTL outputs. The circuit can be adapted to function as a shield.
August 2016 - It can be purchased from Mouser Electronics new chips from Dialog Semiconductor, the...
Found in an American leaflet from the 90s, this circuit uses an AM radio out of station to monitor...
This very low consumption circuit can be powered by a solar cell. The time indication is given by a...