HardLabs

Combined

sanoojes·SplitKeeb·pcb/Combined/Combined.kicad_pcb

Combined PCB layout, top view — open source Nordic nRF board by sanoojes

About the Combined PCB

Combined is an open source Nordic nRF PCB design by sanoojes, published on GitHub under the MIT license. It is a 2-layer board measuring 416.3 × 149.4 mm, with 239 components from 40 distinct parts.

Its main chip is the NRF52840_HOLYIOT_18010, from the Nordic nRF family. Other key parts include the XC6206PXXXMR, BQ24075RGT and SN74LV1T125DBV. By type, the board carries 54 capacitors, 50 LEDs, 49 switches, 48 diodes, 16 resistors and 4 ICs.

It belongs with the keyboards designs in this gallery.

From the project

Custom Split Keyboard

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

Combined, from the project README
From the project README

Main components on the Combined

XC6206PXXXMRBQ24075RGTNRF52840_HOLYIOT_18010SN74LV1T125DBV

Combined bill of materials (BOM)

239 components, 40 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
XC6206PXXXMR
XC6206PxxxMR
U1
1
BQ24075RGT
U2
1
NRF52840_HOLYIOT_18010
nRF52840_holyiot_18010
U3
1
SN74LV1T125DBV
U4
1
2N7002
Q1
2
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J1, J4
1
JST_2MM_LIPO
JST_2mm_LiPo
J3
1
DEV_HEADERS
J5
2
USBLC6-2SC6
ESD_D1, ESD_D2
1
750MA
750mA
F1
1
nice!view
OLED1
2
0.1U
0.1u
PC1, PC2
1
SW_Push
Reset_Btn1
1
0.1UF
0.1uF
SC1
40
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +32
2
SW_Push
SW17, SW46
4
SW_Push
SW25, SW41, SW42, SW47
2
SW_Push
SW33, SW48
1
SW_PWR
SW49
3
0.1uF
ShifterC1, USBI_C1, USB_C1
Show 20 more
QtyPartRefs
2
5.1K
5.1k
USBR1, USBR2
1
LED_0603_Blue
B_LED1
1
LED_0603_Green
G_LED1
48
MX_SK6812MINI-E
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 +40
48
D
D1, D2, D3, D4, D5, D6, D7, D8 +40
48
0.1UF
0.1uF
C1, C2, C3, C4, C5, C6, C7, C8 +40
2
1u
C49, C50
3
4.7UF
4.7uF
C51, C52, C53
1
0.1U
0.1u
C54
4
10K
10k
R1, R2, R5, R9
1
100K
100k
R3
1
100R
R4
1
47K
47k
R6
1
1.5K
1.5k
R7
1
3.9K
3.9k
R8
1
806/820K
806/820k
R10
1
2M
R11
1
470
R12
2
5.1K
5.1k
R13, R14
2
1k
R15, R17

Combined design files

The KiCad project lives in the sanoojes/SplitKeeb repository on GitHub; these links point at the commit this page was built from.

Combined: common questions

What microcontroller does the Combined use?

The Combined is built around the NRF52840_HOLYIOT_18010, from the Nordic nRF family.

How big is the Combined PCB?

The Combined measures 416.3 × 149.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Combined?

239 components, from 40 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Combined design files?

From the sanoojes/SplitKeeb repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Combined design in my own project?

Yes, under the terms of its MIT license, which sanoojes chose for the repository.

Can I test firmware for the Combined without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Nordic nRF firmware against it before you order a PCB.

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