but [Mike] decided the best course of action would be to control line voltage with an Arduino. [Mike] started his build with a four socket wall housing he picked up at Home Depot for a few dollars.

a 3D printed connector that makes mating to the pads much more stable and reliable, a simple interface circuit for translating the logic levels, and an interrupt-driven sample Arduino sketch to ...

The Arduino UNO R4 Minima comes equipped with ... extended 24V tolerance, an SWD connector for easier debugging, and HID support. With all these exciting features, the UNO R4 Minima brings a ...