2 layers57 × 75 mm
2 layers128 × 91.8 mm
Right
agentk/phrettboard1Basic split wireless ergo keyboard
- Size
- 128 × 91.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 78
- Nets
- 42
- Pads
- 252
- Tracks, vias
- 294, 0
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 27 Aug 2024
- Updated
- 27 Aug 2024
Overview
Right is an open-source printed circuit board by agentk, from the agentk/phrettboard repository on GitHub. It is a 2-layer board of 128 × 91.8 mm with 78 parts on 42 nets, routed with 294 tracks and 0 vias.
Its parts include 19 diodes and 19 switches. It belongs with the keyboards and input boards and the nRF52 and nRF5x boards of this library.
README
README.mdPhrettboard v1
A simple split staggered colluminar layout ergonomic keyboard.
Design priorities:
- Wireless - Bluetooth with excellent battery life
- Compact - Small and light enough to travel while chunky enough to stay put on the desk
- Tenting - Slight tenting with ability to adjust tenting in post
- Travel - Able to throw in a backpack daily for work
Project files and folders
The repo is essentially ergogen and zmk smashed together with little regard for preserving the GitHub actions support for the ZMK config.
BOM
| Item | Quantity |
|---|---|
| M3x10 BHCS | 4 |
| M3x20 BHCS | 4 |
| LiPo Battery 2000mAh 3.7V 113450 | 2 |
| PCB | 1 pair |
| Kailh Choc hotswap sockets | 38 |
| Kailh Choc switches of your choice | 38 |
| Keycaps of your choice to match (1U) | 38 |
| Diodes IN4148 SOD-123 | 38 |
| JST-PH 2P Side entry socket | 2 |
| Silicone dome feet 8.8mm x 2.5mm | 10 |
| NRF82840 or Nice Nano v2 dev board | 2 |
| Pin sockets - machine pin - 12pin | 4 |
| Pin headers - machine pin - 12pin | 4 |
| Nice!view LCD display | 2 |
| Pin sockets - machine pin - 5pin | 2 |
| Pin headers - machine pin - 5pin | 2 |
| EVQPUC02K 4.73.51.65 SMD Reset button | 2 |
| MSS3 SMD Sliding power switch | 2 |
Ergogen
The keyboard layout is built in Ergogen, then routed in Kicad.
To modify the layout:
cd ergogen
makeThis will generate files into the ergogen/output/ folder for both outlines and PCBs. It will overwrite any existing routed PCBs and will require you to reroute again.
3D Printing
The 3D printed parts were generated in Fusion 360 based off the PCB step file exported from Kicad. The priority was a form fitting case with some minor tenting which conveniently worked out well to allow space underneath for a large battery alongside the controller. The two inner feet can also be removed to reveal extra heatset inserts that support using M3 screws to increase the hight for extra tenting.
The glamour shots all featue cases FDM printed in ABS and resing printed keycaps. If you decide to print your own keycaps check out KLP Lame for good sculpted keycaps (designed for resin) and Nijuni Keycaps for flatter keycaps (designed for FDM).
If printing the case in ABS I recommend using scaling X & Y by 100.5% to compensate for material shrinkage.
The travel case is designed to be printed in TPU. It prints well in quite flexible TPU and has a lot of give in it. If printing in a different material you will most likely need to scale the model bigger or smaller.
ZMK firmware
To setup the build environment with Docker installed, run:
cd zmk-config
./zmk.sh build-dockerThe typical workflow to modify the keymap is to use the keymap editor, select the Clipboard source with keyboard type of custom, paste in the contents of zmk-config/boards/shields/phrett/phrett.json into the layout field and zmk-config/boards/shields/phrett/phrett.keymap into the keymap field. Modify the keyboard layout as desired, click 'Copy updated keymap' and paste it back into the local keymap.
From there the firmware can be rebuilt using:
cd zmk-config
makeThen connect each keyboard half one at a time, put them into bootloader mode by double tapping reset, then copying to approperate firmware from zmk-config/artifacts/phrett_{left,right}.uf2 to the now mounted controller volume.
License
Phrettboard v1 by Karl Bowden is licensed under CC BY-SA 4.0
Parts
78| Qty | Value | Footprint | References |
|---|---|---|---|
| 19 | ComboDiode | D1, D2, D3, D4, D5, D6, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19 +3 | |
| 19 | PG1350 | S1, S2, S3, S4, S5, S6, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19 +3 | |
| 5 | HOLE_M2_TH | , , , , | |
| 1 | E73:SPDT_C128955 | T1 | |
| 1 | JST_PH_S2B-PH-K_02x2.00mm_Angled | JST1 | |
| 1 | Panasonic_EVQPUL_EVQPUC | Panasonic_EVQPUL_EVQPUC | B1 |
| 1 | niceView | lib:niceView_headers | niceView1 |
| 1 | nice_nano | nice_nano | MCU1 |
The 48 most common of 78 parts.
Questions
How big is the Right PCB?
It measures 128 × 91.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Right use?
78 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Right KiCad files?
From the agentk/phrettboard repository on GitHub, at the commit this page was made from: the board is ergogen/output/pcbs/right.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Right design in my own project?
Its repository states no licence, so its author keeps all rights: ask agentk before reusing the design.
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