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IR is electromagnetic radiation with wavelengths from about 750 nm to 1000 µm, which is beyond the nominal red edge of the visible spectrum.
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USB powered IR emitter for night vision webcam
I had a spare webcam which i turned it into a night vision camera. I have to use IR emitters to be able to see with it ( http://www.instructables.com/id/Night-Vision-Webcam/?ALLSTEPS ) and i don't wan …