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Harry Potter fans should recognize John McKerrell’s Weasley Clock right away. He replaced the brains of the clock with an Arduino fitted with an ethernet shield, and pointed it at his feed, allowing it to show his current location in real time. Check out his site for a nice write-up about the project. Excellent work!



  1. Neil says:

    Perfect for the would-be robber. Who needs to monitor status updates when they can have a clock let them know!

    1. Matt Mets says:

      Yes, also for the unfaithful!

  2. Zak says:

    You beat me to it… I was thinking of doing something similar for my Mom this Christmas…

  3. Jake H says:

    So cool! I’ve wanted to build something like this ever since reading the Harry Potter book which mentions the Weasley family having a clock very much like this. Can’t see my family toting around GPS transponders, though…

  4. Dave Chatting says:

    Microsoft Research built a nice version with their Whereabouts Clock: