We first met Ryan Walmsley when he was fifteen, back in May 2012. He’d been emailing and tweeting with us for months at that point (mostly variations on WHEN CAN I BUY ONE?), and he then proceeded to knock our socks off very shortly after we started shipping by producing, out of the blue, the Rastrack map , which Pi users can register their Pis on, showing the geographical spread of the project

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Ryanteck’s RTK-000-001 motor controller – robotics on a budget