2 layers322.5 × 113.5 mm Ehhhkb2-board, the printed circuit board in 3D

Ehhhkb2-board

Raspberry Pi Pico 2 W（RP2350 + CYW43）を載せた自作キーボード。 85 キー（8×11 マトリクス / 6 行）、USB HID と BLE HID の両対応で、 BLE は6ホストを記憶して切り替えられる。128x32 OLED で状態表示と設定操作ができる。

Open in PCBKit

Size: 322.5 × 113.5 mm
Copper layers: 2
Thickness: 1.2 mm
Parts: 211
Nets: 135
Pads: 901
Tracks, vias: 1,196, 247
Pours: 769
Routed: Yes
KiCad: KiCad 10.0 (file 20260206)
Created: 29 Aug 2026
Updated: 29 Aug 2026

Overview

Ehhhkb2-board is an open-source printed circuit board by Non-Sense, from the Non-Sense/EhHHKB2 repository on GitHub, published under the MIT licence. It is a 2-layer board of 322.5 × 113.5 mm with 211 parts on 135 nets, routed with 1,196 tracks and 247 vias.

It is built around the CH213K. Its parts include 85 diodes, 66 switches, 7 resistors, 3 capacitors and 3 ICs.

Main components

CH213K
SOT-23-32.2V~5.5V 240mV 240mΩ 3.6uA Integrated FET SOT-23-3 ORing Controllers ROHSWCH (Nanjing Qinheng Microelectronics)Power Distribution Switches

README

README.md

EhHHKB2

ブログ記事

ディレクトリ

ディレクトリ	内容
`board/`	KiCad 10 のプロジェクト一式（回路図・PCB・プロジェクト専用ライブラリ）
`case/`	ケースの 3D データ（STEP）とレンダー画像
`firmware/`	Pico SDK ベースのファームウェア（C）、ホスト単体テスト、ドキュメント生成スクリプト

Parts

211

Qty	Value	Footprint	References
85	D	Diode_SMD:D_SOD-123	D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +69
12	MountingHole	MountingHole:MountingHole_2.2mm_M2	H1, H2, H3, H4, H5, H6, H7, H8, H9, H10, H11, H12
4	100k	Resistor_SMD:R_0603_1608Metric	R4, R5, R6, R7
3	4u7	Capacitor_SMD:C_0603_1608Metric	C2, C3, C4
2	5k1	Resistor_SMD:R_0603_1608Metric	R2, R3
2	CH213K	Package_TO_SOT_SMD:SOT-23	U2, U3
2	L_ALT	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.25u	SW78, SW81
2	~	PCM_Mounting_Keyboard_Stabilizer:Stabilizer_Cherry_MX_2.00u	ST2, ST3
1	'	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW57
1	,	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW69
1	-	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW24
1	.	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW70
1	/	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW71
1	0	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW23
1	1	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW14
1	2	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW15
1	3	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW16
1	3V3	PCM_SparkFun-Connector:TestPoint-0.75mm	TP1
1	4	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW17
1	4k7	Resistor_SMD:R_0603_1608Metric	R1
1	5	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW18
1	6	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW19
1	7	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW20
1	8	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW21
1	9	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW22
1	;	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW56
1	=	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW25
1	A	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW47
1	B	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW66
1	C	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW64
1	D	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW49
1	D+	TestPoint:TestPoint_Pad_D1.5mm	TP6
1	D-	TestPoint:TestPoint_Pad_D1.5mm	TP5
1	DEL	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW44
1	DELETE	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.50u	SW43
1	E	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW33
1	END	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW29
1	Esc	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW13
1	F	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW50
1	F1	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW1
1	F10	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW10
1	F11	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW11
1	F12	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW12
1	F2	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW2
1	F3	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW3
1	F4	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW4
1	F5	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW5
1	F6	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW6
1	F7	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW7
1	F8	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW8
1	F9	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW9
1	G	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW51
1	GND	TestPoint:TestPoint_Pad_D1.5mm	TP8
1	GND	PCM_SparkFun-Connector:TestPoint-0.75mm	TP4
1	H	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW52
1	HOME	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW28
1	I	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW38
1	INS	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW45
1	J	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW53
1	K	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW54
1	L	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW55
1	L_CTRL1	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.75u	SW46
1	L_CTRL2	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.25u	SW76
1	L_FN	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.25u	SW77
1	L_SHIFT	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_2.25u	SW61
1	M	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW68
1	MCP73831-2-OT	Package_TO_SOT_SMD:SOT-23-5	U1
1	N	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW67
1	O	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW39
1	OLED display	Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical	J3
1	P	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW40
1	PGDN	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW75
1	PGUP	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW60
1	PrScr	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW59
1	Q	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW31
1	R	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW34
1	RETURN	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_2.25u	SW58
1	R_CTRL	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.25u	SW82
1	R_FN	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u	SW73
1	R_SHIFT	PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.75u	SW72

The 184 most common of 211 parts.

Questions

How big is the Ehhhkb2-board PCB?

It measures 322.5 × 113.5 mm and has 2 copper layers, 1.2 mm thick.

What parts does the Ehhhkb2-board use?

211 parts, built around the CH213K. 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 Ehhhkb2-board KiCad files?

From the Non-Sense/EhHHKB2 repository on GitHub, at the commit this page was made from: the board is board/ehhhkb2-board.kicad_pcb and its schematic board/ehhhkb2-board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Ehhhkb2-board 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).

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/non-sense-ehhhkb2" title="Ehhhkb2-board 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/non-sense-ehhhkb2.jpg" alt="Ehhhkb2-board" width="1200" height="900">

A picture that opens the board, for a README

[![Ehhhkb2-board](https://pcbkit.io/embed/boards/non-sense-ehhhkb2.jpg?size=s)](https://pcbkit.io/boards/non-sense-ehhhkb2)

Source

Repository: Non-Sense/EhHHKB2
Board file: board/ehhhkb2-board.kicad_pcb
Commit: 3cce3c2
Licence: MIT

Similar boards

4 layers44 × 44 mm
HSLinkPro
cherry-embedded/HSLink-hardware
A place to release hslink hardware
155 parts44Apache-2.0
2 layers30.5 × 48.3 mm
Rp2350a testing
74th/rp2040-dev-board
治具には、中心から縦、横それぞれ 0.05 インチ単位で 0.200.50 インチ（1.27mm 単位で 5.08mm から 12.70mm）離れたとこにピンヘッダの固定用の穴が空いています。
46 parts21MIT
2 layers80 × 50 mm
HUB CH334U PCB
openwch/ch334
Share the schematic and layout (KiCad) for DIY USB2.0 4-PORTS HUB with CH334U
36 parts14
2 layers
Pcb default
74th/74th-kicad-parts
74thが使うKiCad Parts
10 parts12CC0-1.0
2 layers149.2 × 82.5 mm
0xPM
llmerlos/0xPM
PICCTRL 0xPM - 6x3+4 Split Keyboard with onboard CH552
65 parts11CERN-OHL-P-2.0
4 layers100 × 60 mm
Ikeda R2 MD mother
ararobo/NHK_2024_R2_MD_mother
公開用フォルダ―です
215 parts5MIT
4 layers90 × 50 mm
Ikeda MainBoard
ararobo/ROBOCON_2025_A_PCB

164 parts3MIT
4 layers25 × 25 mm
Mini AI Camera Module
bartsil/Mini-AI-Camera-Module
Mini AI Camera Module based on ESP32-S3 for IoT and robotic projects
68 parts3Apache-2.0