This circuit has 4 operating modes and was found in the 1995 Encyclopedia of Electronic Circuits Volume 5. The circuit works with light or heat sensors.
This flip-flop circuit is from a September 1985 issue of Radio Electronics magazine. It generates...
Found in a Popular Electronics from the 90's, this circuit detects the approach of objects by the...
This circuit was found in the July 1992 issue of Radio Electronics magazine. The circuit has a...