Boston's Transit,
on your desk.

CharlieBoard is fully open source, streaming real-time data to your custom display.

A framed CharlieBoard on a desk, displaying the MBTA Red Line with illuminated LEDs at several stations.

How it works

1

MBTA V3 API

{
  "id": "1934",
  "type": "vehicle",
  "attributes": {
    "current_status": "INCOMING_AT",
    "latitude": 42.36994,
    "longitude": -71.11294,
    "bearing": 125,
    "updated_at": "2026-04-16T18:38:01"
  }
}

Provides real-time vehicle positions, occupancy, and predictions

→
2
Raspberry Pi Zero 2W

SparkFun · CC BY 2.0

Runs scripts to stream and process the data
→
3
WS2812B LEDs

Display the selected data on the map using multiple colors

Features

Built for transit enthusiasts, makers, and people who love maps.

A Real Map

Each PCB is generated using MassGIS data, showing exact station locations, unlike common transit diagrams.

Multiple Data Types

CharlieBoard is unique in its ability to display position, occupancy, and speed data (when available).

Web Control Interface

Data type, brightness, color scheme, and bedtime hour can easily be changed from the web interface.

Bedtime

This feature turns off the display during specified hours, ensuring the display doesn't disturb your sleep.

Build it, buy it, or follow along.

Pick your own adventure.

Open the repository → Visit the Shop → Read the Build Log →