stereographic projection - checker or chess board
thingiverse
This slides over a Mini Mag-lite 2 AAA LED flashlight to project an 8x8 checkerboard pattern. This is demonstrating stereographic projection. This can project huge squares of light across a room and is fun to play with, especially when the room is dark. The Mini Mag-lite I used is model number P32012. It is the LED version (100 Lumens) powered by two AAA batteries. You unscrew the lens and remove it so you just have the LED providing a point light. I designed the cone (funnel) part to friction fit over the flashlight snugly in OpenSCAD of which I included here. If interested in stereographic projection read more about it here: https://www.thingiverse.com/thing:4875829 Enjoy!
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