4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers15.9 × 23.5 mm
Circuit diagrams and firmware source code for Gboard DIY keyboards
- Size
- 15.9 × 23.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 12
- Nets
- 13
- Pads
- 51
- Tracks, vias
- 149, 16
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 25 Mar 2015
- Updated
- 1 Oct 2026
Overview
Usb 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 15.9 × 23.5 mm with 12 parts on 13 nets, routed with 149 tracks and 16 vias.
It is built around the AMS1117-3.3 and S7B-ZR-3.4(LF)(SN). Its parts include 5 resistors, 4 capacitors, 2 connectors and 1 IC. It belongs with the keyboards and input boards of this library.
Main components
2
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.3V@(1A) 12V 1A 3.3V 5mA 60dB@(120Hz) Fixed Over Current Protection Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSUMWVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
S7B-ZR-3.4(LF)(SN)
弯插,P=1.5mm-25℃~+85℃ 1 1.5mm 12mm 1A 1x7P 3.7mm 50V 6mm 7 7P Brass Glass-Fiber Reinforced PA66 Right Angle Tin UL94V-0 White ZH 弯插,P=1.5mm Wire To Board Connector ROHSJSTWire To Board Connector
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
12| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 22 | Resistor_SMD:R_0402_1005Metric | R3, R4 |
| 2 | 47p | Capacitor_SMD:C_0402_1005Metric | C3, C4 |
| 2 | 5.1K | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 1 | 1.5K | Resistor_SMD:R_0402_1005Metric | R5 |
| 1 | 10u | Capacitor_SMD:C_0402_1005Metric | C1 |
| 1 | 2.2u | Capacitor_SMD:C_0402_1005Metric | C2 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1 |
| 1 | JST_ZH_7P | Library:JST_S7B_ZR | J1 |
| 1 | USB | Connector_USB:USB_C_Receptacle_XKB_U262-16XN-4BVC11 | J2 |
Questions
How big is the Usb PCB?
It measures 15.9 × 23.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Usb use?
12 parts, built around the AMS1117-3.3 and S7B-ZR-3.4(LF)(SN). 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 Usb KiCad files?
From the google/mozc-devices repository on GitHub, at the commit this page was made from: the board is mozc-doublesided/board/usb/usb.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Usb 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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