The sensor used in this circuit is uncommon today, however equivalent types can be tried. The comparator also supports modern equivalents. The circuit is from 80's documentation.
June 2017 - The new touch switches C & K KXT series can now be obtained from Mouser Electronics. These...
This is one of the many anti-deboucer circuits the reader can find on this site. The base is TTL...
The circuit presented, from the Analog Devices linear integrated circuits manual, has compensation for...