4 ms·

Lots of info here: https://lightboard.info/ https://lightboard.info/ Also lots of places to buy them. Here's one: https://www.desktoplightboard.com/product/des

• rozab 5y ago
  The lightboard.info site has instructions for building an $8k professional setup, using tempered glass etc. It does explain the mechanism of the lightboard (frustrated total internal reflection), but otherwise doesn't seem very useful for DIYers. Instructables is the goto site for this sort of thing, I found these instructions for building a small one for under $100: https://www.instructables.com/DIY-Lightboard/ https://www.instructables.com/DIY-Lightboard/