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“This is an Instructable I wanted to do for a while, on how to build a really great-looking Dome Button with built-in LEDs. It’s part of a 2-series where I will explain how we built our Hackerspace Status Button for P-Space, our local hackerspace in Patras, Greece. The basic premise is that we wanted a way for the first person coming into P-space to set the space status to Open, and the last one to leave to set it to Closed. We used to do this through a simple web page, but we wanted an easier way to do that, so we set up an Arduino with a Wi-Fi shield next to the door that connects to that web page and controls the status.”

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