2 layers380 × 148.5 mm Keyboard, the printed circuit board in 3D

Keyboard

The first open source all-screen keyboard

Size: 380 × 148.5 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 500
Nets: 138
Pads: 1,344
Tracks, vias: 2,639, 1,104
Pours: 4
Routed: Yes
KiCad: KiCad 8.0 (file 20240108)
Created: 11 Jul 2025
Updated: 4 Dec 2025

Overview

Keyboard is an open-source printed circuit board by InkboxSoftware, from the InkboxSoftware/all-screen-keyboard repository on GitHub, published under the MIT licence. It is a 2-layer board of 380 × 148.5 mm with 500 parts on 138 nets, routed with 2,639 tracks and 1,104 vias.

It is built around the A1309LLHLX-9-T, MCP3008-I/P and 74HC138. Its parts include 256 capacitors, 128 ICs, 113 resistors, 1 diode and 1 connector. It belongs with the keyboards and input boards of this library.

Main components

README

README.md

The open source all-screen keyboard

The first open source all-screen keyboard. This repository contains all the digital files used to produce the all-screen keyboard created by Inkbox Software.

Material List

Raspberry Pi 4 and up. (Program requires use of OpenGL 3 only supported by this generation of Pis onward)
14.1" wide screen touch display
Pi Pico
Battery (optional)
Case and key files found in 3Dmodels folder
Magnets
Acrylic cores
Various wires and cables to put everything together

To enable SPI on Raspberry Pi running Ubuntu

Due to the 3840x1100 wide display resolution, Raspbian cannot be used. Ubutuntu then requires a little more settup to access all the Pi's features. In /boot/firmware/config.txt place the following text

text

enable_uart=1
dtoverlays=uart0-pi5

Restart, and serial is now accessible via /dev/ttyAMA0 Note this is different from Raspbian's serial file /dev/serial0

To invert touch screeen output

Add the following rule as touchscreen.rules in /etc/udev/rules.d

text

ACTION=="add|change", KERNEL=="event*", ATTRS{name}=="ILITEK ILITEK-TP", ENV{LIBINPUT_CALIBRATION_MATRIX}="-1 0 1 0 -1 1 0 0 1"

Installing required libraries

To install wiringpi go to the github repo (https://github.com/WiringPi/WiringPi) and under Releases download the latest release wiringpi_X.XX_arm64.deb Install with

text

sudo apt install wiringpi_x.xx_arm64.deb

The rest of the required libraries can be installed with

text

sudo apt install build-essential libgles2-mesa-dev libsdl2-dev libsdl2-image-dev libsdl2-ttf-dev libsdl2-ttf-dev libavcodec-dev libavformat-dev libavutil-dev libswscale-dev libavfilter-dev

Starting the main keyboard program

Navigate to the directory To build the program for the first time run

text

make build

Then run with

text

make run

text

sudo ./keyboard

The initial profile to load should be written in the startup file.

Designing Plugins

A plugin template has been created and stored in keyboard/src/plugins-dev/ Edit the plugin.cpp program to function as desired then compile your plugin via

text

make plugin name=myCustomPlugin src=plugin

Keyboard Profile online designer

The latest version of this designer is hosted at https://notin.tokyo/ASK The code for this website is stored in keyboard/profileDesigner

Parts

500

Qty	Value	Footprint	References
143	0.1uF	Capacitor_SMD:C_0603_1608Metric	C1, C10, C11, C12, C100, C101, C102, C103, C104, C105, C106, C107, C123, C124, C125, C126 +127
112	4.7k	Resistor_SMD:R_0603_1608Metric	R10, R11, R100, R101, R102, R103, R104, R105, R106, R107, R108, R109, R110, R111, R112, R113 +96
112	4.7n	Capacitor_SMD:C_0603_1608Metric	C108, C109, C110, C111, C112, C113, C114, C115, C116, C117, C118, C119, C120, C121, C122, C138 +96
112	A1309LLHLX-9-T	footprints:SOT-23W_LH_ALM	U100, U101, U102, U103, U104, U105, U106, U107, U108, U109, U110, U111, U112, U113, U114, U115 +96
14	MCP3008	footprints:SOIC16-N_MC_MCH	U1, U2, U3, U4, U5, U6, U7, U10, U11, U12, U13, U14, U15, U16
2	74HC138	footprints:D0016A_L	U8, U9
1	100n	Capacitor_SMD:C_0603_1608Metric	C17
1	Conn_01x10	Connector_PinHeader_2.54mm:PinHeader_1x10_P2.54mm_Vertical	J1
1	FerriteBead_Small	Inductor_SMD:L_0603_1608Metric	FB1
1	LED	LED_SMD:LED_0603_1608Metric	D1
1	R	Resistor_SMD:R_0603_1608Metric	R1

Questions

How big is the Keyboard PCB?

It measures 380 × 148.5 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Keyboard use?

500 parts, built around the A1309LLHLX-9-T, MCP3008-I/P and 74HC138. 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 Keyboard KiCad files?

From the InkboxSoftware/all-screen-keyboard repository on GitHub, at the commit this page was made from: the board is PCB/keyboard-KiCad/keyboard.kicad_pcb and its schematic PCB/keyboard-KiCad/keyboard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Keyboard 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).

Category and platform

Keyboards and input

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/inkboxsoftware-all-screen-keyboard" title="Keyboard 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/inkboxsoftware-all-screen-keyboard.jpg" alt="Keyboard" width="1200" height="900">

A picture that opens the board, for a README

[![Keyboard](https://pcbkit.io/embed/boards/inkboxsoftware-all-screen-keyboard.jpg?size=s)](https://pcbkit.io/boards/inkboxsoftware-all-screen-keyboard)

Source

Repository: InkboxSoftware/all-screen-keyboard
Board file: PCB/keyboard-KiCad/keyboard.kicad_pcb
Commit: 1140897
Licence: MIT

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