Build a Giant 2,500-LED Wall on a Budget

Aren’t blinking lights just the best? Perhaps the most appealing form of them is the LED matrix. Not only can they blink on and off in patterns, but they can also form pictures and display complex animations. Sure, a traditional LCD display can do the same, and at far higher resolution levels, but LCDs don’t have the same appeal. Those big, bright pixels formed by an LED matrix have a completely different aesthetic.

However, the complexity and cost associated with building a grid of large-scale LEDs tend to keep the sizes of panels on the small side. If you want something that is the size of an entire wall, you’re going to have to fork over some serious cash and spend a considerable amount of time thinking about how to drive and power such a massive LED matrix. But there may be a better way to make big LED matrices: Chris Maher has come up with a solution to making a wall-sized matrix that is inexpensive and simple to build and drive.

Maher’s design centers around a 50×50 grid made up of 2,500 individually addressable LEDs, all powered from a single 12V supply and controlled by a single unit. Instead of relying on costly prebuilt panels, the project uses 18 rolls of 12V SK6812 LED strips at a density of 30 LEDs per meter. This density strikes a careful balance between keeping power requirements manageable and still delivering a visually impressive resolution.

Each 5-meter strip is cut into three 50-LED segments, producing 54 segments in total, with a few extras for redundancy. From there, every connection point is painstakingly prepared: connectors are removed, pads are tinned, and hundreds of short wire segments are cut, stripped, and soldered.

The physical structure is built using a simple wooden frame with board and batten panels as a mounting surface. Careful measurement ensures consistent spacing between LEDs, while a serpentine layout — where each strip alternates direction — creates a continuous data path across the entire grid. This approach minimizes wiring complexity on the front while maintaining a logical flow for data signals.

To keep things tidy, holes are drilled at the top and bottom of each strip, fitted with rubber grommets. These allow wires to pass cleanly to the back side of the panel, where most of the electrical work is hidden. Power distribution and data routing are handled with lever-style connectors, enabling multiple injection points to maintain brightness and signal integrity across the massive array.

Driving all 2,500 LEDs efficiently is a Gledopto 4D-EXMU controller running WLED, a popular firmware for addressable lighting. By splitting the panel into four data runs, Maher avoids performance bottlenecks while keeping everything synchronized. Once configured as a 50×50 vertical serpentine matrix, the display can render animations, patterns, and text with incredible fluidity.

The end result is a striking wall-sized LED display that looks anything but DIY. I don’t know about you, but if I had one, the first thing I’d do is code an implementation of Tetris to play on it.