w4ilun / pocket-keyboard

Pocket Keyboard

First attempt at building a keyboard from scratch

• PCB Design and Fabrication - EasyEDA + Seeed
• EasyEDA Project Link
• Firmware - TMK

Top Layer

Bottom Layer

PCB Layout

Components

Component	Label	Quantity
Atmega32u4		1
16MHZ Crystal	Y1	1
Micro USB Connector		1
22OΩ	R1, R2	2
10KΩ	R3	1
330Ω	R4	1
22pF	C1, C2	2
1uF	C3	1
LED	D0	1
1N4148	D1-D70	70
TL3303 Tactile Switch	SW	70
5-way Switch	S1	1

Schematic

Firmware

• Based on TMK's onekey example
• cd firmware/keyboard/pocket_kbd
• make -f Makefile
• press the reset button
• sudo dfu-programmer atmega32u4 erace --force --debug 5
• sudo dfu-programmer atmega32u4 flash firmware.hex --debug 5
• power cycle board, it should now appear as an USB keyboard