An open system for building split flap displays.

what is a split flap display?

mechanical, modular, open — and possible to build yourself

Split flap displays are the iconic mechanical boards once found in train stations and airports worldwide — physical flaps that spin and snap into place to show letters, numbers, and symbols. That satisfying clack. The slight blur of motion. They disappeared from public spaces in the 1990s. Now they're back as maker projects, home installations, and office displays.

flip forward is an open, modular system for building your own: 3D-printable parts, step-by-step assembly guides, custom PCBs, and WiFi firmware — everything from a single module to a full wall installation. Designed in Germany and developed in the open with a maker community on Discord. Made in Europe, built for the world. All guides and models are free.