4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers98.1 × 62.4 mm
LLMDeck
vkunamneni1/LLMDeckHackpad v3 - Highway
- Size
- 98.1 × 62.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 27
- Nets
- 26
- Pads
- 109
- Tracks, vias
- 138, 11
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 27 Jun 2025
- Updated
- 30 Jun 2025
Overview
LLMDeck is an open-source printed circuit board by vkunamneni1, from the vkunamneni1/LLMDeck repository on GitHub. It is a 2-layer board of 98.1 × 62.4 mm with 27 parts on 26 nets, routed with 138 tracks and 11 vias.
It is built around the SK6812MINI-E. Its parts include 12 diodes, 9 switches, 1 IC and 1 connector. It belongs with the RP2040 boards of this library.
Main components
1README
README.mdLLMDeck
LLMDeck is an 8 key macropad with a rotary encoder for temperature control, an OLED display, and 3 RGB LEDs for status, all in a 3D-printed 2 part case.
It runs on a XIAO RP2040 with KMK firmware to prompt multiple LLMs, utilizing them for various everyday tasks.
Features
- XIAO RP2040 running on KMK firmware
- 3 keys to switch between 3 different LLMs (ChatGPT, Gemini, Llama)
- 3 keys to either summarize, lengthen, or humanize clipboard text
- 2 keys to open corresponding LLM chatbot in browser
- EC11 rotary encoder to adjust prompt temperature (0.0 - 1.0)
- 128×32 0.91" OLED Display (displays current LLM/function)
- 3 RGB LEDs displaying whether LLMDeck is powered on
- 3D-printed case designed in Onshape
- Silkscreen of many LLMS and Hack Club!
Overall CAD Model
Made in Onshape w/ models from Grabcad
PCB
Schematic
(also featured on back of PCB!)
PCB Design
With filled zone
Without filled zone
3D PCB Design
Front
Back
Case
Top
Bottom
(complete assembly at top of README)
Firmware
All firmware was developed in VSCode (w/ KMK). FIRMWARE IS UNTESTED AND WILL PROBABLY NOT WORK. API keys are not included yet (I will add them when I assemble LLMDeck).
- API calls to OpenAI, Google, Meta to utilize LLM functions
- WIFI connection needed
- Data stored in tmp directory
- UNTESTED
BOM
- 1x Seeed XIAO RP2040
- 9x Through-hole 1N4148 Diodes
- 8x MX-Style switches
- 1x EC11 Rotary encoders
- 1x 0.91 inch OLED display
- 8x Blank DSA keycaps
- 3x SK6812 MINI-E LEDs
- 4x M3x5mx4mm heatset inserts
- 4x M3x16mm screws
- 3D Printed Case (top and bottom)
Parts
27| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D3, D4, D5, D6, D7, D8, D9, D10, D11 |
| 8 | Keyswitch | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | S1, S2, S4, S5, S6, S7, S8, S9 |
| 4 | LOGO | LOGO | G, G***, G***, G*** |
| 3 | SK6812MINI | LED_SMD:LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | D1, D2, D12 |
| 1 | OLED_128x32 | OLED:SSD1306-0.91-OLED-4pin-128x32 | J1 |
| 1 | RotaryEncoder_Switch | OLED:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW10 |
| 1 | XIAO-RP2040-DIP | OPL:XIAO-RP2040-DIP | U1 |
Questions
How big is the LLMDeck PCB?
It measures 98.1 × 62.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the LLMDeck use?
27 parts, built around the SK6812MINI-E. 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 LLMDeck KiCad files?
From the vkunamneni1/LLMDeck repository on GitHub, at the commit this page was made from: the board is pcb/LLMDeck.kicad_pcb and its schematic pcb/LLMDeck.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the LLMDeck design in my own project?
Its repository states no licence, so its author keeps all rights: ask vkunamneni1 before reusing the design.
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