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DIY Portable USB Solar Charger ($20 - 4 Ports)
Bicycle Cell Phone Charger (Wind Turbine with build in Battery)
How to Make a Wonder Box Cooker/Cooler
Build an LED Display That Responds To Music
Simple LED Lit Fish Bowl
DIY Tracing Light Box for Under $20.
DIY Home Arcade Machine
Build your own speaker from scratch!
108W LED Grow Light Panel