Hi All,
Many years ago I used a 741 chip (and some others that I can't remember) to create a circuit. Circuit had an antenna (5 inch or so) and when some one was getting close to it (6 ft or closer) it was dimming up a 6-volt light (based on how close is the person). I am awfully rusty with electronic these days. Does anybody know how to make one of these again or if there is any ready made out there?
Thanks in advance,
Homer