I was interested in doing glass etching and projecting LEDs onto them. So, I did this project as a gift for my husband.

The final product looks like this. But the LED was better seen from an angle for some reason -- I'm sure it's just physics.

I designed the holder for the glass -- this is the top view, showing the LED holes. I miscalculated the distance between the LEDs, though!

This is the bottom design, so it can hold the IR sensor, the LED microcontroller, and the wires.

This is how all things fit perfectly.

I'm still working on the actual assignment, but the above was just for fun. I'll learn physics and come back with my board!