We found this touch control on a Popular Electronics from 1970. The circuit makes use of an integrated of the time. It can be adapted to use modern equivalent components.
Found in a 90s Motorola documentation, this circuit makes it a PUT. This component is not very...
This circuit is from a 1964 Electronic Design, appearing in this section and website with...
This circuit is from a 1980s Signetics documentation but is valid for modern operating. Next to...