2 layers416.3 × 149.3 mm Combined, the printed circuit board in 3D

Combined

Custom Split Keyboard

Size: 416.3 × 149.3 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 490
Nets: 179
Pads: 2,136
Tracks, vias: 3,576, 593
Pours: 1,892
Routed: Yes
KiCad: KiCad 9.0 (file 20241229)
Created: 15 Dec 2025
Updated: 25 Dec 2025

Overview

Combined is an open-source printed circuit board by sanoojes, from the sanoojes/SplitKeeb repository on GitHub, published under the MIT licence. It is a 2-layer board of 416.3 × 149.3 mm with 490 parts on 179 nets, routed with 3,576 tracks and 593 vias.

It is built around the SN74LV1T125DBV, BQ24075RGT and USBLC6-2SC6. Its parts include 192 diodes, 118 capacitors, 98 switches, 36 resistors and 8 ICs. It belongs with the keyboards and input boards and the nRF52 and nRF5x boards of this library.

Main components

README

README.md

SplitKeeb

A split keyboard for my daily use.

CAD

will be updated soon.

PCB

Schematics Left left 1 left 2

Schematics Right right 1 right 1

Renders pcb_back pcb_front

JLC order pcb_order

Firmware

Firmware available at firmware/ firmware will be tweaked and created after i get the materials/get approved.

Bill of Materials

Checkout BOM.csv

Parts

490

Qty	Value	Footprint	References
102	0.1uF	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C1, C1, C10, C10, C11, C11, C12, C12, C13, C13, C14, C14, C15, C15, C16, C16 +86
96	D	SplitKeeb:D_SOD-123	D1, D1, D10, D10, D11, D11, D12, D12, D13, D13, D14, D14, D15, D15, D16, D16 +80
96	MX_SK6812MINI-E	PCM_marbastlib-mx:LED_MX_6028R-ROT	LED1, LED1, LED10, LED10, LED11, LED11, LED12, LED12, LED13, LED13, LED14, LED14, LED15, LED15, LED16, LED16 +80
80	SW_Push	PCM_marbastlib-xp-mx:SW_MX_HS_KS-2P02B01-01_1u	SW1, SW1, SW10, SW10, SW11, SW11, SW12, SW12, SW13, SW13, SW14, SW14, SW15, SW15, SW16, SW16 +64
8	10k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R1, R1, R2, R2, R5, R5, R9, R9
8	5.1k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R13, R13, R14, R14, USBR1, USBR1, USBR2, USBR2
8	LOGO	LOGO	G*, G, G, G, G, G, G, G*
8	SW_Push	PCM_marbastlib-xp-mx:SW_MX_HS_KS-2P02B01-01_1.5u	SW25, SW25, SW41, SW41, SW42, SW42, SW47, SW47
6	0.1u	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C54, C54, PC1, PC1, PC2, PC2
6	4.7uF	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C51, C51, C52, C52, C53, C53
4	1k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R15, R15, R17, R17
4	1u	Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder	C49, C49, C50, C50
4	SW_Push	PCM_marbastlib-xp-mx:SW_MX_HS_KS-2P02B01-01_1.25u	SW17, SW17, SW46, SW46
4	SW_Push	PCM_marbastlib-xp-mx:SW_MX_HS_KS-2P02B01-01_1.75u	SW33, SW33, SW48, SW48
4	SolderJumper	Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm_NumberLabels	JP1, JP1, JP2, JP2
4	USBLC6-2SC6	PCM_Package_TO_SOT_SMD_AKL:SOT-23-6	ESD_D1, ESD_D1, ESD_D2, ESD_D2
4	USB_C_Receptacle_USB2.0_16P	PCM_marbastlib-various:USB_C_Receptacle_HRO_TYPE-C-31-M-23	J1, J1, J4, J4
2	1.5k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R7, R7
2	100R	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R4, R4
2	100k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R3, R3
2	2M	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R11, R11
2	2N7002	PCM_Package_TO_SOT_SMD_AKL:SOT-23	Q1, Q1
2	3.9k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R8, R8
2	470	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R12, R12
2	47k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R6, R6
2	750mA	Fuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder	F1, F1
2	806/820k	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R10, R10
2	BQ24075RGT	Package_DFN_QFN:VQFN-16-1EP_3x3mm_P0.5mm_EP1.6x1.6mm	U2, U2
2	DEV_HEADERS	PCM_fab:PinHeader_01x05_P2.54mm_Vertical_THT_D1mm	J5, J5
2	JST_2mm_LiPo	PCM_SparkFun-Connector:JST_1x02_P2.0mm_Horizontal_SMD	J3, J3
2	LED_0603_Blue	PCM_LED_SMD_AKL:LED_0603_1608Metric	B_LED1, B_LED1
2	LED_0603_Green	PCM_LED_SMD_AKL:LED_0603_1608Metric	G_LED1, G_LED1
2	SN74LV1T125DBV	Package_TO_SOT_SMD:SOT-23-5	U4, U4
2	SW_PWR	PCM_marbastlib-various:SW_MSK12C02-HB	SW49, SW49
2	SW_Push	Button_Switch_SMD:Panasonic_EVQPUL_EVQPUC	Reset_Btn1, Reset_Btn1
2	XC6206PxxxMR	Package_TO_SOT_SMD:SOT-23-3	U1, U1
2	nRF52840_holyiot_18010	PCM_marbastlib-various:nRF52840_holyiot_18010	U3, U3
2	nice!view	nice_view:nice_view	OLED1, OLED1

The 488 most common of 490 parts.

Questions

How big is the Combined PCB?

It measures 416.3 × 149.3 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Combined use?

490 parts, built around the SN74LV1T125DBV, BQ24075RGT and USBLC6-2SC6. 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 Combined KiCad files?

From the sanoojes/SplitKeeb repository on GitHub, at the commit this page was made from: the board is pcb/Combined/Combined.kicad_pcb and its schematic pcb/Combined/Combined.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Combined 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 nRF52 and nRF5x

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/sanoojes-splitkeeb-combined" title="Combined 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/sanoojes-splitkeeb-combined.jpg" alt="Combined" width="1200" height="900">

A picture that opens the board, for a README

[![Combined](https://pcbkit.io/embed/boards/sanoojes-splitkeeb-combined.jpg?size=s)](https://pcbkit.io/boards/sanoojes-splitkeeb-combined)

Source

Repository: sanoojes/SplitKeeb
Board file: pcb/Combined/Combined.kicad_pcb
Commit: 3ddb215
Licence: MIT

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