Circular 3x3 LED matrix

thingiverse

This project could be realized using an array of tiny programmable lights. To produce a high-quality display, you'd want around 256x128 pixels. However, getting the required density in LED matrices while maintaining a relatively affordable price point and being small enough for portable devices has proven challenging. Some existing options, like this 256x64 or this 240x64 example, come close but have significant gaps between the pixels or lower resolutions respectively. For better color accuracy, it's worth considering using an RGB arrangement per pixel unit rather than individual red and blue LEDs, making your custom design similar to those used in gaming displays, high-end televisions, and certain smart home devices