- Second revision of circuit board.
- Arrows on L2 shifted over one column.
- Circuit board license changed to match the rest of the Atreus project.
The second revision of the circuit board exposes the reset pin, removing the need for hookup wire described below. It also removes the need to cut a notch in the circuit board to allow the USB connector more clearance.
The layout changed slightly by shifting the arrow keys on L2 over one column so they can be hit from the normal position without the pinky key.
- Initial board design in KiCAD + Racket.
- Assembly guide updated to include wood finishing.
- Cable hole in case spacer has rounded edges.
- New layout: multidvorak.
- Switch to Pololu A-Star Micro controller. (also USB mini->micro)
A circuit board was designed in KiCAD with the switch placement logic written in Racket. The first revision of the circuit board does not expose the reset pin, so hookup wire is needed to provide a backup reset mechanism once the board is fully assembled. The firmware contains a reset mechanism, but if bugs in the firmware prevent it from being activated, the back case can be removed and the hookup wires can be connected twice in a second to initiate a reset.
The new design replaced the Teensy 2 microcontroller with the smaller A-Star Micro which uses a USB Micro connector instead of USB Mini.
The new multidvorak layout allows the firmware to support hardware dvorak and software dvorak simultaneously. The edges of the cable hole are rounded off to reduce strain on the cable.
- Matias Quiet Click switches.
- Teensy 3: ARM-based microcontroller.
- Orestes: firmware written in Forth.
An experimental prototype using Matias Quiet Click switches and the ARM-based Teensy 3 controller. The Matias switch shape was supported by cutting the notches out of each switch hole individually with a knife.
Porting the firmware to the ARM platform was accompanied by porting an implementation of Forth and porting the firmware logic to that.
- New OpenSCAD case design by Constantine.
- New layouts: hardware dvorak, hardware colemak.
- Assembly guide.
The case was redesigned in OpenSCAD to be easier to produce from mail-order laser cutting services. This revision can be recognized by its use of eight screws instead of the original seven. The cuts in the top plate around the switches are also much closer to the switches themselves. A second independent build was documented.
The assembly process is documented properly.
- Custom Atreus firmware in C.
- Layout changes; new layer.
A custom Atreus-specific firmware codebase was started. Digits were moved to a numpad arrangement and the L2 layer (function and arrow keys) was added. The first third-party build was documented.
- Initial prototype!
- Case hand-drawn in Inkscape.
- Teensy 2 microcontroller, hand-wired matrix.
- Uses TMK firmware.
This was the first Atreus, created solely for personal use and meticulously hand-wired with a number of errors. Support for the Atreus was added to the TMK firmware codebase, but power-saving bugs in TMK meant that it occasionally dropped key presses on low-voltage laptops.