Designing Keyboard 101 - Speaker Deck

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Designing Keyboards 101 @nasa9084

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$ whoami • @nasa9084 • LINE corp. • Go / Kubernetes

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No content

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What are you using?

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FILCO Majestouch Convertible 2 (Cherry MX Blue) 2016.04 - 2018.10

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Ergodox EZ (Cherry MX Blue) 2018.10 -

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Ergodash (Kailh BOX white) 2019.02 -

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Self-madeʁ

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Self-made Keyboards • Buy keyboard kit, build by your hands • Shop • https://yushakobo.jp • About 25,000 yen ~

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Mint60 By eucalyn_

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Corne Cherry By foostan

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Nomu30 By recompile keys

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Keyboard Related Addiction • Keyboard Buying Addiction • Keyboard Making Addiction • Key-switch Acquisition Syndrome • Key-cap Acquisition Syndrome • Cable Making Addiction • Keyboard Designing Addiction

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Designing Keyboards 101 @nasa9084

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Components • Key-switches (Cherry MX compatible) • Key-caps • PCB • Diode (1N4148/1N4148W) • Controller (ProMicro) • Cable, Reset switch, Jack, LEDs, and so on…

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Cherry MX (compatible) switches 40 yen / key ~

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ProMicro Arduino compatible micro controllers by sparkfun 2,492yen

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ProMicro compatible controllers Arduino compatible controller compatible controller… 300 yen~

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QMK Firmware • Open source keyboard ﬁrmware for ProMicro • https://github.com/qmk/qmk_ﬁrmware • Support 6 keyboards and community keyboards $ git clone github.com/qmk/qmk_firmware $ cd qmk_firmware $ make $KEYBOARD:$KEYMAP:avrdude # if your keyboard is Mint60 $ make mint60:default:avrdude

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Designing

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First step to the Endgame https://booth.pm/ja/items/1044084

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How to Design a Keyboard 1. Design key layout 2. Design schematic 3. Map schematic and footprint 4. Arrange parts layout 5. Wiring 6. Order your PCB

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Design Key Layout • Design with Keyboard Layout Editor • http://www.keyboard-layout-editor.com

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http://www.keyboard-leyout-editor.com

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Keyboard Layout Preset • Begin from famous keyboards • Add new keys you want • Remove keys you don’t use http://www.keyboard-layout-editor.com

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Design Schematic • Use KiCad • is a CAD for creating PCB • http://kicad-pcb.org •  • Current stable is 5.1.2

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Key Matrix • 14 pins are avail for key input • Layout keys in a matrix to use many keys • Detect a key by 2 pins

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Other Components • Connect all components to ProMicro • Connect left and right by TRRS cable • Reset switch to reset ProMicro • (Optional) LED

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TRRS Cable • 3.5mm - 4 contacts phone connector cable • Tip-Ring-Ring-Slave cable • Hard to ﬁnd to buy • Connect right hand and left hand

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Map Footprints Schematics → Parts

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Order PCB • Output Garber format file • Confirm with KiCad GarbView • Measure size • Rename files • Order from https://www.elecrow.com