It's a 3D Printer which consists of a Raspi and a Driverboard handling the high current switching. The Raspi operates without a host computer and is directly interpreting the g-code in my self-written software.
Basic fume extractor for a laserengraver. Sucks the air and fumes with a vacuum cleaner through some plastic pipe into a vacuum cleaner bag filled with activated charcoal. Pretty noisy but works fine ;)
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