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Re:Homemade thermal camera by joezydeco on Sunday October 14, 2012 @11:11AM (#4651567)
Even better: the Thermal Flashlight. Makes a cruder picture, but way cheaper:

http://publiclaboratory.org/tool/thermal-photography

Re:Homemade thermal camera by stcredzero on Sunday October 14, 2012 @02:16PM (#4652064)
PLOTS (Public Laboratory for Open Technology and Science) is worth checking out. They're a group that's trying to put technology into the hands of citizens to make a difference.