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Over the past few months I have made a few improvements to my Rostock Mini 3D printer, which has greatly improved the quality of its prints and ease of use. For example, one of the additions is a Bluetooth interface which doesn’t require any firmware support.
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A while ago, some people at work asked me to build them a couple of buttons to be used for a quiz. After some discussion, we agreed that a wireless system would be the most convenient. Building upon the Party Button design, this is the result.