This circuit was found in an article in Radio Electronics magazine. The issue is from July 1992 and the circuit uses components that are common today.
This circuit was obtained in a General Electric documentation from the 80's, and can be used as a...
This circuit appears in various parts of this site and this section, with diverse origins. This is from...
November 2016 - The TL3780 ultra-miniature E-switch touch switches can now be obtained from Mouser...