how to make a hidden camra cheap also with night vision?

You are better off finding a camera made for this purpose. I use a color baby monitor that has night vision and a wireless receiver with a 2.5" screen, purchased for about $60. If you wanted to use a web cam, you would likely only get night vision, without day vision, by removing the internal UV filter and replacing it with some old school, exposed 35mm film.
so if i wanted to have both day vision and night vision, do i only have to remove the UV filter?
110100101108 years ago
webcam + bunch of ir leds ?