IKEA Led Torch - Pinhole Projector

thingiverse

This converts the IKEA Knäred led torch into a pinhole projector making it a nice childrens night light. The idea is that an ideal point light source can project a sharp image without using optics for focusing. This is not 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 the alignment with the led affect the projection quality. It is not a perfect point light source, so the projection gets a bit blurry a farther distances. The Knäred torch is 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 it is easier to snap them into place. A collection of additional projection disks is available [here](https://www.thingiverse.com/thing:3142295)!