This indicator with the integrated circuits CA3162E and 3161E was published in the July 1990 issue of Radio Electronics magazine. The circuit can be used as a basis for 3-digit projects.
September 2017 - Broadcom's AEAT 8800 Q24 magnetic encoder can be obtained from Mouser...
This circuit uses a 555 (according to the diagram) to generate 50 ms tone bursts at a frequency of 1.5...
We found this mains-powered switch circuit in Electronics Now magazine from July 1994. It could be...