

GummyKey Left
a split keyboard that i made
- Size
- 142.9 × 109.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 69
- Nets
- 51
- Pads
- 305
- Tracks, vias
- 418, 43
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 27 Jan 2023
- Updated
- 27 Jan 2023
Overview
GummyKey Left is an open-source printed circuit board by gumorr, from the gumorr/GummyKey repository on GitHub, published under the MIT licence. It is a 2-layer board of 142.9 × 109.5 mm with 69 parts on 51 nets, routed with 418 tracks and 43 vias.
Its parts include 30 switches, 29 diodes, 2 resistors, 1 IC and 1 connector. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) boards of this library.
README
README.mdGummyKey
a split keyboard that i made

How to build
im too lazy to write a comprehensive build guide, so just know a lot of the steps in building a solfe keyboard will apply to this
BOM
| Component | Location | QTY |
|---|---|---|
| Pro Micro | U1 | 2 |
| TRRS Jack | J1 | 2 |
| 2 Pin Tactile Button | SW1 | 2 |
| 4.7K Resistor, 0805 | R1,R2 | 4 |
| 1N4148W Diode, SOD123 | D1-29 | 58 |
| Kailh Cherry Hot-Swap Socket | K1-29 | 58 |
Parts
69| Qty | Value | Footprint | References |
|---|---|---|---|
| 29 | D | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +13 |
| 25 | SW_Push | Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u | K1, K2, K10, K11, K12, K14, K15, K16, K17, K18, K20, K21, K22, K23, K24, K26 +9 |
| 4 | HOLE | GummyKey:M2_Hole | TH3, TH3, TH3, TH3 |
| 3 | SW_Push | Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.25u | K13, K19, K25 |
| 2 | 4.7k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2 |
| 1 | LOGO | GummyKey:Cat_Logo | G*** |
| 1 | MJ-4PP-9 | GummyKey:MJ-4PP-9 | J1 |
| 1 | ProMicro | GummyKey:ProMicro | U1 |
| 1 | SW_Push | GummyKey:Reset_Switch | SW1 |
| 1 | SW_Push | Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_2.25u | K28 |
The 68 most common of 69 parts.
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Questions
How big is the GummyKey Left PCB?
It measures 142.9 × 109.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the GummyKey Left use?
69 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 GummyKey Left KiCad files?
From the gumorr/GummyKey repository on GitHub, at the commit this page was made from: the board is pcbs/left/GummyKey_Left.kicad_pcb and its schematic pcbs/left/GummyKey_Left.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the GummyKey Left design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).