With a motor and some piping, it's surprisingly easy to build this inexpensive, efficient wind generator - and enjoy free energy forever.

You can also harness the energy of the sun to power anything from a light bulb, to your entire house, using a few solar cells and a plastic case.

Learn how to use solar panels to supplement your home or workshop electricity needs here.

For more tips by Make go to www.makezine.com.

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