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Make a Wi-Fi Extender
Green Solar Powered Water Barrel Version 2
pepsi Can Crab
a great gun base. I added some things on to hold more ammo, and Improve the feel of the gun.
Knex Mini Semi Auto Rubber Band Gun (MSARBG)
you could add washers around the holes where the straps are tied for extra stability
How to Make "Apple Pie" (zucchini) Pie Filling
Free Energy from Thin Air!
Paracord and Pulley Hanging Table
High Quality (and Safe) Nickel Plating
BICITRACTOR B300 (POC21 Version, wait for the next Version in february if you want to build one)
Autonomous Arduino Car
Knex CD holder/rack
Arduino Watch Sport