This circuit was found in documentation from the 1970s. It eliminates contact bouncing, providing a single pulse. PUT is not a common component today.
It can be obtained from Mouser Electronics, sensors (receivers) transmitters and benders for...
Suggested by General Electric in a 1965 documentation, this circuit can use the TIC106 as an SCR....
The circuit shown is from the 1994 Linear Applications Handbook from National Semiconductor. The...