# Split Flap

> A split-flap text board, like airport/train departure displays, that flips only the characters that changed when its value updates.

- Author: [kevingirelli](https://21st.dev/@kevingirelli)
- Library: @delego
- License: MIT
- Tags: Split Flap, Departure Board, Text Animation, Clock
- Live preview: https://21st.dev/@kevingirelli/components/split-flap

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/kevingirelli/split-flap?api_key=$API_KEY_21ST"
```

Requires a 21st API key (generate one at https://21st.dev/mcp) passed as `API_KEY_21ST`. Free accounts get a limited number of installs per day; unlimited on a paid plan — see https://21st.dev/pricing.

Full component directory: https://21st.dev/llms.txt · More like this: https://21st.dev/community/components/s/split-flap.md