When notes stuck to the water heater failed [Ryan] decided to whip up “the world’s most expensive 240V relay” using a servo, a real time clock and of course an Arduino. All in an attempt to save a ...
Q. My electric water heater is 18 years old, but still works and makes enough hot water. I want to reduce my water heating costs. What can I do to make my water heating more efficient other than ...
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