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Solar Panel Setup around $100
Vacuum Forming Rig
How to "make" plastic
Plastic Smithing: How To Make your own HDPE Plastic Anything (DIY plastic lumber)
Awsome $50 diy projector (well for me)
Faux ivory ring carved from bone
Mini Arduino environment monitor ** UPDATE - Added RTC ***
Making a 1 Watt Solar Array.
Frankenstein Laser Engraver
Pocket laser engraver.
How to make a survival candle cheaply and easily
How to make a small wind generator (In celebration of earth day!)
BUDGET Custom Console, Digital Gauges, GPS Via Android Tablet
Inexpensive Seed Starter