
You may need to determine if a window is open. You may need to make sure the window is open nine more times. If so then this is the set of 10 magnetic contact switches you need my friend. Attach these puppies anywhere and then connect them all to the Arduino. Before you know it, you'll be notified when the fridge is open, the garage door, or the peanut butter jar. The possibilities are endless! You are tiny. You stick to things. They have screw holes in case they don't stick to your stuff.

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