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Photography by Tom Igoe

WIRELESS MOTION SENSING MADE EASY

image XBee radios track every hit in roller derby action!

By Tom Igoe

I was never much of a sports fan until my friend Mattie introduced me to the Gotham Girls Roller Derby (gothamgirlsrollerderby.com). Once you’ve seen a good blocker send the opposing team’s jammer sailing into the sidelines with a solid hip check, you’re hooked. Add all the bad puns in the players’ nicknames, and you’ve got a sport I just can’t resist.

Soon, I had to find a way to hack it. If the skaters wore motion sensors, ...

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