Self-made RGB color digital tube

Digital tubes (also known as digital display tubes) are a very common thing, but the most common thing we have always used is red. Actually, I think it's pretty ugly. So, for so many years, I've been looking for an RGB digital tube that will be more beau. But look all over the place, there are red, green, blue, white, there is no RGB color, the whole treasure does not exist this kind of thing, since there is none, then I will make my own one, so today I want to make a cheap and cool RGB digital tube.

Video address: https://www.bilibili.com/video/BV1Pq4y1Y7uj

(The professional version is released, please click on the project in the upper right corner)