Here’s a humongous barrel-type compost rig that can turn up to 500 lbs of a load using pedal-power. All the parts were made from bike drive trains and parts found around the shop. This might be overkill for a household, but might make sense for a small community garden. Definitely you’d get some exercise while you’re promoting aerobic decomposition.

Pedal Powered Compost Turner [Thanks, Phil Shapiro!]

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Gareth Branwyn is a freelance writer and the former Editorial Director of Maker Media. He is the author or editor of over a dozen books on technology, DIY, and geek culture. He is currently a contributor to Boing Boing, Wink Books, and Wink Fun. And he has a new best-of writing collection and “lazy man’s memoir,” called Borg Like Me.

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