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MAKE subscriber Rob Torcellini of Eastford, CT, sent in his extrusion system for turning HDPE pellets into thin, textured strips his plants liked.

I built a plastic extrusion system to make synthetic growing media for my aquaponics system. It uses the Teensy AVR microprocessor from PJRC, an old windshield wiper motor and a few Legos!

John Baichtal

My interests include writing, electronics, RPGs, scifi, hackers & hackerspaces, 3D printing, building sets & toys. @johnbaichtal

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