This interesting circuit of an Electronic Design stores the highest voltage of two applied to its inputs. The circuit is from 1964 and can be adapted to use modern components.
This circuit triggers an alarm in the event of a power failure. The circuit is from an 80's...
We found this circuit in the April 1978 issue of Radio Electronics magazine. The 2-digit circuit uses...
This CMNOS crystal-based circuit generates a 2 Hz signal. It was found in the October 1994 issue of...