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Re: Furnace Monitor --losing total accumulated minutes for y

PostPosted: Sat Sep 15, 2018 8:00 am
by Sirquil
Schematic used in testing project file: ""Furnace_Monitor.ino."

4N25 OptoIsolator Schematic.JPG


May require addition circuitry for connecting to furnace. such as rectification of AC and and a voltage divider.
This is not your typical DIY project; consult a HVAC professional before connecting to furnace!

William