If you had an array of high power addressable LEDs, how would you project them onto a wall? Perhaps you’d use a Fresnel lens, or maybe an individual lens on the top of each. [Joo] faced this problem ...

I can't remember what I was doing a week ago but that was about when I became aware of the existence of these. I'm sure there are some other brands/models out there, is there anyone out there that can ...