IKEA Led Torch - Pinhole Projector

thingiverse

This converts an IKEA Knäred LED torch into a pinhole projector making it a nice children's night light. The idea is that an ideal point light source can project a sharp image without using optics for focusing, which isn't very efficient because most of the light is blocked behind the pinhole resulting in a pretty dark image. It still works reasonably well in a dark room. The hole size and alignment with the LED affect the projection quality. It's not a perfect point light source, so the projection gets a bit blurry at farther distances. The Knäred torch is a nice little hackable light. I originally had this idea in 2016 when I first got one, now I finally got around creating it. Unfortunately, it seems it is no longer sold by IKEA. **Update 2018/10/07** Made the disks slightly thicker and less flexible so they are easier to snap into place. A collection of additional projection disks is available at https://www.thingiverse.com/thing:3142295!