Marian Kleineberg

Check out [this article](https://marian42.de/article/ledmatrix-tutorial/), I bought a few different materials and there is a picture that compares them.

This does look concerning! If it does work sometimes and doesn't work sometimes it's really difficult to diagnose. Did it happen again since you posted this report? Does it happen...

This formula for entropy is a bit counter intuitive, but it can be derived like this:  That being said, you don't have to use entropy, if you get better...