Using Arduino to Wirelessly Control Appliances

The Arduino Uno, and variants, should only be used for directly powering peripheral modules and not devices.  Consider the maximum current consumption when determining what is a device and what is a module. A string of lights is more of a device as opposed to a panel indicator light, motor controller boards are modules, not the motors they drive, MOSFET boards, not the valves or solenoids that they control.

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