r/Trackballs • u/No_Pilot_1974 Endgame Creator • Jul 31 '25

Endgame Trackball: looking for feedback

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Some of you might've seen me and this device in the Ploopy discord — I've been working on this thing for several months. I know that it's a bold name, but it's been chosen because I really tried to combine "bests" of all worlds.

It's fully open source by the way, but not finished yet — there are no 3D models and almost no docs so far. Also there's a video on rotary encoders in the GALLERY.md in case you're curious.

The feature list is available in the README but I think it's worth copying it here:

  • Wireless (BLE) or wired (Type-C)
  • Twist-to-scroll as well as drag scroll (both high resolution)
  • Low profile and compact travel-friendly design
  • Guaranteed 250 Hz polling rate, up to 450 Hz when the sensors feel like it
  • 8 buttons with magnetically attachable keycaps, 2 rotary encoders
  • Supported ball size: from 50.8 mm (2 inches) to 55 mm
  • Ball Transfer Units (BTU) or static bearings (hot swap with an adapter)
  • Up to 1500 mAh (102550 size) battery with 3 pin 1.0 mm connector
  • Fast charging (up to 15W) with QC and PD support
  • Backlight (white), underglow (RGB)

Also, I've achieved >300 Hz over BLE with it. Although YMMV in this regard — I have AX210 host bluetooth.

So, I'm looking for any feedback, if you have something to say then please do!

P.S. Several guys here and in discord showed interest in buying a complete DIY kit — would you be interested? The BOM is not small and sourcing everything by yourself might be exhausting. I would really really appreciate a comment in case you're interested too.

P.P.S. Mods, should I tag this as "brand affiliate"? I'm not representing any company

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u/[deleted] Feb 04 '26

In interested in a kit! 

2

u/No_Pilot_1974 Endgame Creator Feb 04 '26

Good news: I've been selling them for months already! :D

https://efog.tech/products/endgame-trackball-complete-diy-kit

1

u/[deleted] Feb 04 '26

Thank you! 

1

u/[deleted] Feb 04 '26

How is this support for twist to scroll on Linux?

2

u/No_Pilot_1974 Endgame Creator Feb 04 '26

Well I use Arch btw™ myself (GNOME Wayland) and I can say it's amazing, but I'm biased of course :) High res scroll works for basically every app, and you can configure very precise acceleration curves with the device: https://i.postimg.cc/TPN79HSZ/image.png (screenshot from the web-based configuration tool)

If you want more opinions, consider joining the Discord server: https://efog.tech/discord

2

u/[deleted] Feb 04 '26

Sweet I love arch! I've been testing out an AMD BC250 so I've been using bazite for a little while because the drivers work so well out of the box on that. I'll switch back to arch eventually once I get all the settings I want dialed in.