This National Semiconductor circuit appears elsewhere on this site. The circuit must be powered by symmetrical source and equivalent modern operational can be used.
This circuit was found in a French publication called Generation Electronique, It can be assembled...
Two of the four gates of a 4011 is used in this biestable touch circuit. Do not use a power source...
Using the well-known SAA1027, this circuit serves as interface for PC. No English documentation was found...