This shield circuit with an optical coupler was found in an 90s EDN. The circuit can be used with voltages from 0 to 600 V with the indicated component values.
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...