The actual Night Vision hack instructions are in this video:
This video shows a teardown of a cheap smartphone camera. This camera is so called focus-free camera, it has no moving parts and it is permanently focused into distance (infinity). The camera has an infrared filter in between on lens and CMOS chip. There's a possibility to remove the filter and make the camera sensitive to infrared light. With an infrared LED illumination you could have a homemade night vision.
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