This circuit has a sensitivity of 2uW. We found it in documentation from the 1980s. The integrated circuit is from that time. Equivalents can be tried.
This is one of many possible touch switch configurations using CMOS integrated circuits. The...
This circuit was found in documentation from the 1980s requiring a variable power supply from 0 to...
The integrated circuit used in this project is unusual and it includes internal transistors that...