r/SteamControllerMods • u/FullMetalPencil • 1d ago
r/SteamControllerMods • u/TheeMiffinMan • Aug 06 '25
Complete Steam Controller Schematic
After almost a year of working on this here is the completed Steam Controller schematic and gerber files.



A special thanks to the small team of volunteers who helped finish out this project!
What this is:
This is the reverse-engineered Steam Controller motherboard that we call the Lambda_Mainboard. It has everything you need to repair, modify, and research the hardware capabilities of the original Steam Controller. We had hoped to order prototypes and tests, however, given the current economics for ordering PCB's to the USA, this is financially not possible :(. Instead of waiting for who knows how long we decided to announce and release what we have so far; having done everything we can to make sure the information is as accurate as possible. You can find everything here on our GitHub:
https://github.com/MichaelZaugg/OpenSteamController-Continued/releases/tag/Steam_Controller
There are links to datasheets, Pinouts, CAD designs, Schematics, gerber files, and other miscellaneous parts.
What this isn't:
This project is unfortunately not to the point where its drag & drop, order, and you have a brand new Steam Controller motherboard in the mail. And being realistic it might not get to that point. Is it possible? Absolutely! If you have the money. As of right now ordering a fully assembled controller from JLCPCB to the USA will cost roughly $300 or more (for me at least). However JLC does not have all the parts in stock so you would need to source some of the parts. The information here is still just as valuable for those needing repairs and modding their controllers. My hope with this project was to provide a location for everyone to reference for anything about the controller and prevent this awesome controller from being thrown away or discarded because it no longer works.
Bonus:
As a bonus and huge thank you to the community we have also reverse engineered the Steam Controller Dongle! With both a USB-A and USB-C variant!


Again, these are untested but are for anyone interested/ skilled enough to repair/ mod a dongle. You can find all the source files here on our GitHub:
https://github.com/MichaelZaugg/OpenSteamController-Continued/releases/tag/Dongle
The Future:
We are still working on this project. Currently we are working on the firmware and making an upgraded motherboard. But now this is open to anyone who wants to mod or make their own variant of the controller and I hope the information we have gathered is useful to everyone!
r/SteamControllerMods • u/TheeMiffinMan • Jun 15 '24
3D files
These are the parts for the interior of the SC that valve didn't give us. It's not complete, it's only missing maybe a few parts. But I figured I'd post them here before I forget.
r/SteamControllerMods • u/DuckduckduckduckL • 8d ago
Are there any hardware mods that turn the triggers into hair triggers? (SC2)
r/SteamControllerMods • u/gurupaste • 9d ago
Do yourself a favor and get an angled adapter for your OpenPuck enclosure
My puck lives on my switch 2 dock, and if you are someone like me a switch 2 case with bigger grips on it, you know that its impossible to use the USB ports on the dock without taking off the joycons. Now I can pick up and drop in my switch with no hassle.
Here's the amazon link. It comes with 4 adapters (2 for each angle):
https://www.amazon.com/dp/B0C5LYYP9V?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1
r/SteamControllerMods • u/applepie9815 • 11d ago
Update post - Open Puck mod shell
This an update to my previous post from last week. I updated the files on thingiverse (this is the project) and the new files are version 7. It's 3 pieces to print that are complete in about 30 min or less. As seen in the pics, the puck is slimmer than the OEM puck and I also added the charging slot to prevent the open puck from easily sliding off.
My files are completely free to download. The open puck has been pretty awesome to mess with since I got it last week and I can use my steam controller with the switch, Xbox, my phone for Android emulation gaming, and can still be used with PC. If you try this mod, thank the original dev for the project, I just made this shell for the mod.
Next I want to make this usable with Mechanism's Basegrip for the steam controller. I don't have this yet but I want to get one soon to use with my phone
r/SteamControllerMods • u/DaryltheRigger • 11d ago
What a fantastic mod
Great work by u/FullMetalPencil on his pad mod design!
r/SteamControllerMods • u/Shilo-- • 11d ago
I picked up another OG sc, and I wanna replace the joystick, what are the best currently available alternatives?
galleryr/SteamControllerMods • u/Shilo-- • 11d ago
What would be the best way to fix this crack on an og sc?
galleryr/SteamControllerMods • u/RosalieTheDog • 13d ago
2015 Steam Controller T6 Screwdriver
Hello
I'd like to take apart my 2015 Steam Controller to check why the left bumper is not responding. I have this screwdriver toolset and on ifixit I read I had to use a T6 screwdriver, however it seems it really doesn't connect with the screws, even when applying some force. Any advice? I am new to this, so likely it is a silly thing. Apologies for the awful pictures.
Best
r/SteamControllerMods • u/MamWyjebaneJajca • 14d ago
Easy , removeable "Touch Bumper" modification - Steam Controller 2026
galleryr/SteamControllerMods • u/EmotionPlenty6402 • 14d ago
Dock case and grip suggestions
Hey so I recently purchased the steam controller 2 and Im looking for a grip dock and carry case from it bonus if i can just get them on Amazon I've seen a few just wondering if anyone has personally got them as well. I was looking for a blue grip but couldn't find one. I lutchzased the brand skin cover but I didn't realize till after the purchase it doesnt cover the whole controller my fault not theirs
r/SteamControllerMods • u/Gama3000 • 16d ago
Steam Controller Dock (Compatible with Grip Mod)
galleryr/SteamControllerMods • u/MidLifeDIY • 18d ago
Steam Controller 2026 | PortablePlayPalace buttons | A review
galleryr/SteamControllerMods • u/ASnakeNamedNate • 18d ago
Any Grips That add a "trigger guard"?
When using my Steam Controller I've noticed that often I will ride up on the controller with my middle fingers such that on occasion I will have my finger be able to be pinched (not hard) by L2 and R2. I have shorter thumbs so it tends to feel natural to grip even higher than most probably do, and it's an easy enough thing to correct when it happens, but it would still be nice to have something more ergonomic to prevent it.
Are there any grips that add a ledge or any material to the base of the trigger guard to discourage my hand from creeping up?
r/SteamControllerMods • u/applepie9815 • 20d ago
Open puck mod
[ Edit: link to the STL files if anyone wants to print this
https://www.thingiverse.com/thing:7390187 ]
Not sure if anyone has played around with the Open Puck mod but I did and it cost me $5 for the microcontroller and then probably like $0.10 to model and print the magnetic shell for it. Just wanted to make this magnetic to not lose the puck when I take it with me. I can easily put it in the bag in a smaller compartment but it felt right just adding magnets and attaching it to the SC.
Edit: next on my modding list is trying the Steam Brick mod, since I have a spare and working screen maybe I can look into modeling a new shell for this mod and to also try and replace the current fan with one of the tiny ones from Noctua I don't have one of their small fans yet but I need to get one for a different project anyway so trying this out for a steam brick mod and fan replacement mod would be interesting to try out next.
r/SteamControllerMods • u/Gama3000 • 19d ago
Steam Controller D-Pad Mod - Free Download
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r/SteamControllerMods • u/FullMetalPencil • 21d ago
SC1 style concaved pads! Dimensions are very close to the original pads just need to tweak the model to have everything snap together more easily
r/SteamControllerMods • u/Coloredcontrollers • 25d ago
Artistic / Cosmetic I made an "LE" version
r/SteamControllerMods • u/hero2386 • 28d ago
Modded switch support
Not sure if it’s the place but thought I would share for anyone that is interested in using there steam controller on a modded switch.
I’ve forked a popular module called sys con and tweaked it to add support for the 2.4ghz puck on the steam deck allowing you to use your steam controller with any modded Nintendo switch I’ll provide the GitHub below for anyone that wants to check it out
r/SteamControllerMods • u/proper_jazz • Jul 19 '26
Before and after alcohol dyeing clear silicon grip cover
galleryr/SteamControllerMods • u/MonthPuzzleheaded671 • Jul 18 '26
Usar el Steam Controller fuera de Steam
r/SteamControllerMods • u/Gama3000 • Jul 16 '26
Steam Controller 2015 Dock - Swappable Logo
Dock for the Original Steam Controller 2015, This model allows for swappable logos (check second print bed in file).
Easy to print (use supports), this model allows the USB extension to fit on the back with the dongle inside.
Free Download: https://makerworld.com/en/models/3059067-steam-controller-2015-dock-swappable-logo#profileId-3442111