Voltage timer monitors line-connected ac loads
by Michael Petersen, Maxim Integrated Products, Sunnyvale, CA; Edited by Charles H Small and Fran Granville, EDN, Aug 16 2007
Focus:
A simple circuit consisting of an optoisolator, a counter, and passives measures the time that an ac load is energized. Example uses would be to track usage and power consumption of well pumps, water heaters, furnaces, air conditioners, or other ac-powered loads.
What you’ll learn:
- How to track run-time of ac powered loads
Notes:
An EDN Design Idea
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