Using the integrated circuit DCP01051D this circuit was found in the magazine Electronics Now of August 1998. The maximum current is 50 mA.
This circuit is from a March 1978 Radio Electronics magazine article that showed how to build it....
This circuit was obtained from an article in Radio Electronics magazine in October 1966. It...
In the figure we have a bistable circuit that activates LEDs from touch rings and turns off data...