Play light patterns with your fingertips.
An open-source reinterpretation of Nam June Paik's
Participation TV (1963).
All source files are on GitHub.
Build one now, or join the kit waitlist.
Print the case. Order the parts. Flash the firmware.
Requires 3D printing, basic soldering, PCB ordering, and component sourcing. Kits are coming if you'd rather skip the sourcing.
The build guide includes all 3D models, PCB schematics, artworks, and Gerber files. Need help? Ask on Discord. Video guide coming soon.
Open the build guidePreview presets, flash from the browser, or open the Live Editor when you want to make your own.
Connect Patternflow over USB, then click the button to flash the current firmware from the browser.
Browser flashing is available on desktop Chrome or Edge. On mobile, preview the built-in patterns below.
Pick a preset below to change the 3D preview.
Everything about Patternflow
Two posts on r/arduino brought Patternflow to 150K combined views and 3.5K upvotes.
Hundreds of comments asked when it would be available, where to find the files, and how to build their own.
PCBway reached out right after the first post. Their timing made the first PCB possible just when Patternflow needed one.
The community was not asking for a product. They were asking for the files. So Patternflow was opened: schematics, firmware, case, build guide, all of it in the repository. Hardware designs are shared under CC-BY-SA 4.0; firmware and web code are MIT.
The encouragement in the comments is the reason it stays open. Not a finished object but a starting point: build, modify, fork, share.
A reinterpretation of Nam June Paik's Participation TV (1963). Paik brought participation into art. Patternflow tries to carry that gesture further, from participation into creation.
More of the story, from failed prints and broken potentiometers to the first PCB and the 30-day build process, is documented in the journal.
Read the journalThe first one was made in Seoul, April 2026.
The next one could be anywhere.
If you build your own, share photos on Discord or open a GitHub issue. Your build will be added to the map.
Remember some years ago Teenage Engineering did a simple LED matrix music visualizer thing with IKEA and it was super lame. Your thing is much closer to what it should have been.
That is the coolest most useless thing on the planet.
Out of 100's of projects in a similar category, yours is the first that I must freaking have.
This is one of those ultra-niche things I just love.
More love to this post please!!!
So uh... so when are you selling this? Can't wait.
Another up is not enough. I'm gonna try to build one.
Incredibly cool. I'd love to have this in my home!
Remember some years ago Teenage Engineering did a simple LED matrix music visualizer thing with IKEA and it was super lame. Your thing is much closer to what it should have been.
That is the coolest most useless thing on the planet.
Out of 100's of projects in a similar category, yours is the first that I must freaking have.
This is one of those ultra-niche things I just love.
More love to this post please!!!
So uh... so when are you selling this? Can't wait.
Another up is not enough. I'm gonna try to build one.
Incredibly cool. I'd love to have this in my home!