4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers52.2 × 52.2 mm
Circuit diagrams and firmware source code for Gboard DIY keyboards
- Size
- 52.2 × 52.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 43
- Nets
- 25
- Pads
- 115
- Tracks, vias
- 344, 34
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 25 Mar 2015
- Updated
- 1 Oct 2026
Overview
Base 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 52.2 × 52.2 mm with 43 parts on 25 nets, routed with 344 tracks and 34 vias.
It is built around the ATMEGA32U4-AU. Its parts include 26 connectors, 5 capacitors, 3 resistors, 1 IC and 1 crystal. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
1README
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
43| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | Conn_01x01_Male | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J15, J16, J17, J18, J19, J20, J21, J22, J23, J24, J25, J26 |
| 12 | Conn_01x02_Male | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1, J2, J3, J4, J5, J6, J7, J8, J9, J10, J11, J12 |
| 3 | C | Capacitor_THT:C_Axial_L3.8mm_D2.6mm_P7.50mm_Horizontal | C3, C4, C5 |
| 3 | TestPoint | TestPoint:TestPoint_Pad_D2.0mm | TP1, TP2, TP3 |
| 2 | 22 | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R2, R3 |
| 1 | 0.1uF | Capacitor_THT:C_Axial_L3.8mm_D2.6mm_P7.50mm_Horizontal | C1 |
| 1 | 10K | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R1 |
| 1 | 16MHz | Crystal:Crystal_HC49-4H_Vertical | Y1 |
| 1 | 1uF | Capacitor_THT:C_Axial_L3.8mm_D2.6mm_P7.50mm_Horizontal | C2 |
| 1 | ATmega32U4-AU | Package_QFP:TQFP-44_10x10mm_P0.8mm | U1 |
| 1 | Conn_01x04_Male | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J13 |
| 1 | Conn_02x03_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J14 |
The 39 most common of 43 parts.
Questions
How big is the Base PCB?
It measures 52.2 × 52.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Base use?
43 parts, built around the ATMEGA32U4-AU. 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 Base KiCad files?
From the google/mozc-devices repository on GitHub, at the commit this page was made from: the board is mozc-yunomi/board/base/base.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Base 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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