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. See other MBTA display projects that use the same API.

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2
Raspberry Pi Zero 2W

SparkFun · CC BY 2.0

Runs scripts to stream and process the data
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3
WS2812B LEDs

Display the selected data on the map using multiple colors. How addressable LEDs work →

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).

Addressable LEDs

Individually controllable WS2812B LEDs light each station in the right color for the data CharlieBoard is showing.

Web Control & Bedtime

Change data type, brightness, and color scheme from the web interface, and turn the display off during sleep hours.

Build it, buy it, or follow along.

Pick your own adventure.

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