Katie’s been using a Pi at home for some years for a number of projects, but her most ambitious yet is her Minion Pi, which she was preparing for a school science exhibition when we met her. Minion Pi is a customised Kossel Mini 3D printer driven by a Raspberry Pi 2 – Katie’s built a custom power supply and a custom user interface on an iPad using her phone as a hotspot, so the whole thing is completely self-contained. Why? She’s building an army of Minions, her first step towards world domination.
Katie’s made a very detailed build diary available (she warns me that the server it’s on is easily overloaded, so it’s possible you may have to come back later to look at it).
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