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 ...

Question: You recently wrote about putting a timer on a water heater to save energy. My utility company told me that would be a waste of money because it actually would save little energy. Who's right ...

A water heater timer allows you to program when your water heater activates and deactivates during a 24-hour period, based on your home’s usage habits. “Many people don’t know that your water heater ...