You’ve probably seen a few little gadgets and apps where you can wave it around and it spells something out on a long exposure, or draws a little picture. Pretty cool, but they’ve all been somewhat small — mainly good for painting stripes or single lines of text. The Mechatronics Guy’s “Light Scythe” is a two-meter bar covered in LEDs, and can be used to make man-sized graphics by moving it around in a long exposure.
It’s powered by Arduino/Seeduino hardware: you put together the graphics on a laptop, the signal gets sent to the separately-driven LED stick, and it displays it at whatever rate is necessary to make the image appear correctly during, say, a 10-foot walk and 8-second exposure.
[via Hack a Day]