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.
This circuit was obtained in a 1982 magazine. In it we have the way to connect two integrated...
Found in a 1970's Radio Electronics, this circuit uses a triac to switch loads on the AC network. This...
This circuit is from a 1968 Electronic Design. The circuit uses transistors of the time that can...