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. I would like to know if it is energy efficient to turn off an electric hot water heater when one is away from a house for a period of time. If it is energy efficient to turn the hot water heater ...
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