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Grow Onions from Discarded Onion Bottoms
Bio fuel briquettes, compress paper pulp and sawdust into fuel bricks.
Cheap and Simple Steam Engine
Double Capacity MintyBoost with 4-AA Battery Holder Modification
Standalone Arduino / ATMega chip on breadboard
Small NFT Hydroponics System
Gas Bottle Wood Burner
How to make a fractal antenna for HDTV / DTV plus more on the cheap