Mosaik

Overview

Mosaik is a 320 × 320 mm wall panel of 1,024 RGB pixels. Four 8 × 32 WS2812B LED panels sit between a 3D-printed base and a grid that gives every LED its own square cell, behind a white diffuser, so the light reads as crisp square pixels rather than glowing dots.

An ESP32-S3 runs the panel and serves a web UI on your WiFi. From your phone you pick an animation, set the brightness and speed, paint pixel art or upload a sprite. There's no app and no account, and nothing leaves your network.

Animations

Seventeen generative animations run at about 30 frames per second: Plasma, Game of Life, Starfield, Fire, sorting algorithms, maze carving and solving, Langton's Ant, Matrix Rain, Boids with a predator hunting the flock, self-playing Asteroids and Snake, Fireworks, Lava Lamp, Synthwave, a spinning wireframe cube, a Mandelbrot zoom and Bouncing Balls.

Build your own

Everything is open source under the MIT license: the firmware, the printable parts, a bill of materials and step-by-step build instructions. The frame prints in PLA on a standard printer, goes together with M3 screws, and runs from a Mean Well LRS-200-5 supply. Firmware updates install over WiFi, and if an update fails to start, the panel rolls back to the previous version on its own.