4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers19 × 76 mm
Circuit diagrams and firmware source code for Gboard DIY keyboards
- Size
- 19 × 76 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 15
- Nets
- 17
- Pads
- 82
- Tracks, vias
- 152, 5
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 25 Mar 2015
- Updated
- 1 Oct 2026
Overview
Sub is an open-source printed circuit board by google, from the google/mozc-devices repository on GitHub, published under the Apache-2.0 licence. It is a 2-layer board of 19 × 76 mm with 15 parts on 17 nets, routed with 152 tracks and 5 vias.
It is built around the CD4148WSP, SK6812MINI-E and CPG151101S11-1. Its parts include 8 diodes, 4 switches, 2 connectors and 1 resistor. It belongs with the keyboards and input boards of this library.
Main components
3
CD4148WSP
08051 Independent 1.25V@100mA 150mA 1A 200mW 4ns 5uA@75V 75V 0805 Switching Diodes ROHSLIZSwitching Diodes
SK6812MINI-E
SMD-40℃~+85℃ 0.6mA 1.78mm 120mcd~240mcd 120° 160mcd~320mcd 1kHz 2.8mm 2000V 3.2mm 3.7V~5.5V 460nm~470nm 515nm~525nm 620nm~625nm 800Kbit/s 815mcd~1275mcd Semi-transparent lens SMD RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)CPG151101S11-1
SMD- Mechanical Keyboard Shaft ROHSKailhMechanical Keyboard Shaft
README
README.mdCircuit diagrams and firmware source code for Gboard DIY keyboards, previously known as Google Japanese Input / Gboard April Fools.
This is not an officially supported Google product.
Products
Please refer to the README in each directory for more details.
Parts
15| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | D | Diode_SMD:D_0805_2012Metric | D5, D6, D7, D8 |
| 4 | SK6812MINIe | Library:SK6812MINIe (Reverse) | D1, D2, D3, D4 |
| 4 | SW_Push | Library:Keyswitch | SW1, SW2, SW3, SW4 |
| 1 | 510 | Resistor_SMD:R_0402_1005Metric | R2 |
| 1 | Conn_Proxy1 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J5 |
| 1 | Conn_Proxy2 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J6 |
Questions
How big is the Sub PCB?
It measures 19 × 76 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sub use?
15 parts, built around the CD4148WSP, SK6812MINI-E and CPG151101S11-1. 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 Sub KiCad files?
From the google/mozc-devices repository on GitHub, at the commit this page was made from: the board is mozc-doublesided/board/sub/sub.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sub design in my own project?
Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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