For the eclipse tomorrow, I made a few different pinhole projectors. A simple single aperture, or multiple apertures to make different eclipse patterns. And the smiley face should show eyes that start looking in one direction and end looking in another.
- Bit or Laser Size:
- 3mm ABS (or any other opaque material)
After the eclipse, I found that these worked very well. The trick is to have them far enough from the target surface you are casting a shadow on. I spent the first half hour of the eclipse wondering why they always showed sharply focused bright dots until I realized that I hadn't pulled them far enough away: