1000 Fireflies: The Kuramoto Model

This weekend during the Northern Spark 2012 festival in Minneapolis, a group of 1000 bicyclists will attach synchronizing bike lights and ride through the city at night.

The Kuramoto Model (1000 Fireflies) will distribute 1000 interactive blinking LED devices to bicyclists who will attend Northern Spark 2012. The devices are outfitted with microcontrollers and radio units that allow them to mutually and observably synchronize with others, as do certain species of firefly. These devices, in isolation, look similar to conventional LED cycling safety lights, but in groups exhibit an immediately noticeable phenomenon. To maximize the visual impact for all festival attendees, organizers will encourage participating cyclists to gather together in a large group to tour the various festival sites.

This project owes much to the research of Yoshiki Kuramoto, who in 1975 first articulated a mathematical model that describes why, how and when large systems of similar oscillators (things that cycle automatically and repeatedly) can mutually synchronize, without any single coordinating force or leader. With Kuramoto’s legacy (as well as the earlier work of Norbert Wiener and Art Winfree) as a starting point, this project aims to activate and transform the social networks and urban dynamics associated with cycling, by fusing this existing system with one biased towards synchronization. Grafting this artificial system of synchronized blinking lights onto a real-world urban transportation system does two things: first, it calls attention to the individual act of cycling as a component of a larger dynamic system with its own unique patterns and qualities, and second, it momentarily transforms that system through a subtle but pointed intervention in urban social space.

This is a really fun project, and it is amazing how quickly these lights synchronize in such large numbers.  The project is completely open source hardware, and the mastermind behind the project, David Rueter, has put the design files and code on Github.

Make sure to check out the build process on the project blog.  Lots of great pictures!


Adafruit publishes a wide range of writing and video content, including interviews and reporting on the maker market and the wider technology world. Our standards page is intended as a guide to best practices that Adafruit uses, as well as an outline of the ethical standards Adafruit aspires to. While Adafruit is not an independent journalistic institution, Adafruit strives to be a fair, informative, and positive voice within the community – check it out here: adafruit.com/editorialstandards

Join Adafruit on Mastodon

Adafruit is on Mastodon, join in! adafruit.com/mastodon

Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Join over 36,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython – The easiest way to program microcontrollers – CircuitPython.org


Maker Business — “Packaging” chips in the US

Wearables — Enclosures help fight body humidity in costumes

Electronics — Transformers: More than meets the eye!

Python for Microcontrollers — Python on Microcontrollers Newsletter: Silicon Labs introduces CircuitPython support, and more! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi

Adafruit IoT Monthly — Guardian Robot, Weather-wise Umbrella Stand, and more!

Microsoft MakeCode — MakeCode Thank You!

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — #NewProds 7/19/23 Feat. Adafruit Matrix Portal S3 CircuitPython Powered Internet Display!

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



1 Comment

  1. I can’t help but look at this and wonder, could I subert the communications that they’re using for synchronization to send messages in morse code?

Sorry, the comment form is closed at this time.