4 layers19 × 76 mm Mozc doublesided, the printed circuit board in 3D

Mozc doublesided

Circuit diagrams and firmware source code for Gboard DIY keyboards

Size: 19 × 76 mm
Copper layers: 4
Thickness: 1.6 mm
Parts: 26
Nets: 30
Pads: 139
Tracks, vias: 508, 36
Pours: 2
Routed: Yes
KiCad: KiCad 8.0 (file 20240108)
Created: 25 Mar 2015
Updated: 1 Oct 2026

Overview

Mozc doublesided 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 4-layer board of 19 × 76 mm with 26 parts on 30 nets, routed with 508 tracks and 36 vias.

It is built around the STM32F042F4P6, CD4148WSP and SK6812MINI-E, with the CPG151101S11-1, HC-ZH1.5-8AW and S7B-ZR-3.4(LF)(SN) among its other parts. Its parts include 8 diodes, 6 connectors, 4 resistors, 4 switches and 1 capacitor. It belongs with the keyboards and input boards and the STM32 boards of this library.

Main components

README

README.md

Circuit 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.

drumset

Google 日本語入力ドラムセットバージョン
 Google Japanese Input Drum set version

変換の煩わしさを感じさせない思いどおりの日本語入力を提供します。

Announce
Release date: Apr 1, 2010
Source: Not open source

morse

Google 日本語入力モールスバージョン
 Google Japanese Input Morse version

モールス符号で思いどおりの日本語入力

flap

Google 日本語入力パタパタバージョン
 Google Japanese Input Patapata version

もう、なにも覚える必要はありません。押して離すだけの日本語入力。

magichand

Google 日本語入力マジックハンドバージョン
 Google Japanese Input Magic hand version

マジックハンドでらくらく入力

Promotional video
Announce
Release date: Apr 1, 2014
Source: Not open source

piropiro

Google 日本語入力ピロピロバージョン
 Google Japanese Input Piropiro version

もうキーはいらない

Promotional video
Announce
Release date: Apr 1, 2015
Source: /mozc-piropiro

furikku

Google 日本語入力物理フリックバージョン
 Google Japanese Input Physical Flick version

さわれるフリック

Promotional video
Announce
Release date: Apr 1, 2016
Source: /mozc-furikku

puchipuchi

日本語入力プチプチバージョン
 Google Japanese Input Puchi Puchi version

空気のように、軽やかな入力。

Promotional video
Announce
Release date: Apr 1, 2017
Source: /third_party/mozc-puchi

nazoru

Gboard 物理手書きバージョン
 Gboard Physical Handwriting version

新しいタイプの手書き入力。

Promotional video
Announce
Technical details
Release date: Apr 1, 2018
Source: /mozc-nazoru

mageru

Gboard スプーン曲げバージョン
 Gboard Spoon Bending version

タネも仕掛けもない、柔軟な入力。

Promotional video
Announce
Release date: Apr 1, 2019
Source:
- /mozc-mageru for firmware, schematics, and PCB layout.
- /third_party/mozc-mageru for 3D model.

yunomi

Gboard 湯呑みバージョン
 Gboard yunomi version

もう、おすしかない。

Promotional video
Announce
Release date: Oct 1, 2021
Source: /mozc-yunomi

bar

Gboard 棒バージョン
 Gboard bar version

キーの次はボーです。

Promotional video
Announce
Release date: Oct 1, 2022
Source: /mozc-bar

caps

Gboard 帽バージョン
 Gboard CAPS version

入力は、帽険だ。

Promotional video
Announce
Release date: Oct 1, 2023
Source: /mozc-caps

double sided

Gboard 両面バージョン
 Gboard double sided version

表面かと思ったら裏面でした。

Promotional video
Announce
Release date: Oct 1, 2024
Source: /mozc-doublesided

dial

Gboard ダイヤルバージョン
 Gboard Dial Version

まるくおさめました。

Promotional video
Announce
Release date: Oct 1, 2025
Source: /mozc-dial

conveyorbelt

Gboard くるくるバージョン
 Gboard Conveyor Belt version

流れるような文字入力を

Promotional video
Announce
Release date: Oct 1, 2026
Source: /mozc-conveyorbelt

Parts

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
2	1K	Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R3, R4
2	510	Resistor_SMD:R_0402_1005Metric	R1, R2
2	CUT	Library:CUT	CUT1, CUT2
1	0.1u	Capacitor_SMD:C_0402_1005Metric	C1
1	Conn_Downstream	Library:JST_S8B_ZR	J3
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
1	Conn_SWD	Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical	J1
1	Conn_Upstream	Library:JST_S8B_ZR	J2
1	JST_ZH_7P	Library:JST_S7B_ZR	J4
1	STM32F042F4Px	Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm	U1

Questions

How big is the Mozc doublesided PCB?

It measures 19 × 76 mm and has 4 copper layers, 1.6 mm thick.

What parts does the Mozc doublesided use?

26 parts, built around the STM32F042F4P6, 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 Mozc doublesided KiCad files?

From the google/mozc-devices repository on GitHub, at the commit this page was made from: the board is mozc-doublesided/board/main/main.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Mozc doublesided 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).

Category and platform

Keyboards and input STM32

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/google-mozc-devices-main-2" title="Mozc doublesided in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/google-mozc-devices-main-2.jpg" alt="Mozc doublesided" width="1200" height="900">

A picture that opens the board, for a README

[![Mozc doublesided](https://pcbkit.io/embed/boards/google-mozc-devices-main-2.jpg?size=s)](https://pcbkit.io/boards/google-mozc-devices-main-2)

Source

Repository: google/mozc-devices
Board file: mozc-doublesided/board/main/main.kicad_pcb
Commit: e6a2336
Licence: Apache-2.0

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