This comparator circuit was found in the May 1988 Radio Electronics magazine; The power supply does not need to be symmetrical.
This passive circuit was found in the March 1995 issue of Elexctonics Now magazine. The circuit is for...
This circuit was found in an ancient American documentation. Used integrated circuits are uncommon...
Using the 555 and 4020, this timer was found in the July 1994 Radio Electronics magazine. The...