I have a 220v water well, & about once a year I accidentally leave a spigot on all nite. I wish to design a monitor which can beep inside my house after 3 hours of continuous well motor use. 220v wire to the pump is easily accessible under my house, since the tank & regulator are dry, under my house. I turn my cell phone off at night, so I just want a beep which will wake me up. Components?
If the Arduino power supply is connected after the power switch of the motor, then you only need a buzzer.
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