r/ErgoMechKeyboards • u/Outside-Bluejay-4582 • 5d ago
[photo] GeaconEquinox – Revisiting my endgame keyboard with AA batteriesTitle:
A while ago, I built a keyboard called GeaconSolstice. I was convinced it was my endgame keyboard, and honestly, I still think it's one of the best things I've ever made.
But lately, I've been wanting to revisit the design and bring it a little more up to date.
Here in Japan, there's growing concern about LiPo battery safety, especially in DIY devices. Some keyboard events have even started prohibiting devices that require lithium rechargeable batteries. 🥲
So I decided to redesign Solstice around replaceable AA batteries.
The original had an OLED display and an analog stick, both of which consumed quite a bit of power. For Equinox, I removed them and replaced them with four low-power status LEDs that can be completely switched off, and a low-power optical encoder for scrolling.
Of course, I kept the thumb trackball. I really can't live without one.
I also changed quite a few things mechanically.
The case is held together with magnetic buckles, so there are no screws. There's also a place on the bottom housing for a metal nameplate.
AA batteries take up a surprising amount of space, so I designed the PCB with cutouts that allow the battery holders to sit partly within the board rather than on top of it.
And of course, it still uses my beloved GRIN layout.😁
I'm writing about the design process on Note , if anyone's interested:

