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A few years ago, I had a pair of rather ancient old Israeli IR night-vision goggles. They're early-early first-generation,
and as such, need an infrared light source. I'm told they were
originally used in conjunction with IR searchlights mounted to tanks,
and IR-lensed flashlights. In order to use them myself, I simply whipped up a Radio Shack project box that held two IR LEDs,
a switch, and a pair of AA batteries. Taped to the goggles, they were
self-illuminating, and you could work hands-free in total darkness.
Range was short- about 20 feet for anything nonreflective, you could
get a return off of reflectors and license plates from about
150 feet though- and they're small tubes. It was like looking through
two toilet-paper tubes with the ends covered in green cheesecloth. :)
Anyway, they worked fine, but used an obscure and not-all-that-easy-to-find mercury battery.
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Keep your fingers away from the spinny blades o' death and you should
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