What NASA Takes Zillions to Do…

…MIT students do for $150. (Thanks to Kathy Grable)

UPDATE from Harold Smith:

In the same vein: How to build your own device to protect you from billion dollar “less than lethal” energy weapons, specifically sonic ones. I hope someone can build a counterpart to tasers and the evil “heat guns”!

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9:35 am on September 19, 2009