1st version of my garage door monitor using one of my Spark (now) Cores. These wifi enabled arduinos can be programmed and monitored over the internet. I attached two magnets on the belt and two hall effect sensors detect if the door is open or closed. I have a relay on board to control the opener from my phone, but it isn't wired in yet and only triggers the blue LED at the moment. Once a couple more parts arrive, I will move the circuit over to a protoboard. For now, it notifies me every 15 minutes if the door is left open and logs any activity to Drive.
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