Found in a 1980s American documentation, this circuit appears with variations elsewhere in this section. The circuit activates a relay according to the supply voltage.
This circuit was found in the November 1992 issue of Radio Electronics magazine. It uses...
This 80's circuitry decodes stereo signals used in analog TV at the time. The circuit can be used...
This configuration often addressed on this site is from a 2000 documentation. The circuit can be...