Seemed to be a strong Raspberry Pi meeting: OpenCV, Kodi, a seismograph in the making and a macro photography rig.
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Stephen had his Felix 3D printer printing out an elaborate vase:
Stephen had his Raspberry Pi running OpenCV with a Raspberry Pi camera doing edge detection and line width measurements at 30 frames per second.
Paul brought along the latest incarnation of his Raspberry Pi based macro photography rig:
Some basic parts to build a demonstration seismograph: