This automatic shutdown circuit was found in a William Sheets from the 1990s. The circuit automatically shuts down a car's electrical system.
We found this circuit in the October 1978 issue of Radio Electronics magazine. The magazine...
This siren configuration using the 555 has already been explored in other circuits on this site. In...
VR can be from 50 to 220k it is recommended to connect a 100-ohm resistor in series. The lamp may...