HardLabs

BLEkeyboard

hujohn1·keyboardstuff·BLEkeyboard/BLEKeyboardKicad/BLEkeyboard.kicad_pcb

BLEkeyboard PCB layout, top view — open source Nordic nRF board by hujohn1

About the BLEkeyboard PCB

BLEkeyboard is an open source Nordic nRF PCB design by hujohn1, published on GitHub. It is a 2-layer board measuring 90 × 130 mm, with 40 components from 7 distinct parts.

Its main chip is the XIAO-nRF52840-Plus-SMD, from the Nordic nRF family. Other key parts include the ER_OLEDM0.91_1x-I2C. By type, the board carries 19 switches, 18 diodes, 2 ICs and 1 connector.

It belongs with the keyboards designs in this gallery.

From the project

record of my mechanical keyboard builds

v1: Jul 28, 2026 Changed resistors from 5k to 5.1k Added status LED Changed multiple global labels to net labels Rewired WS2812s Changed resistor and capacitor namings

BLEkeyboard, from the project README
From the project README

Main components on the BLEkeyboard

ER_OLEDM0.91_1x-I2CXIAO-nRF52840-Plus-SMD

BLEkeyboard bill of materials (BOM)

40 components, 7 distinct parts.

QtyPartRefs
1
ER_OLEDM0.91_1x-I2C
U1
1
XIAO-nRF52840-Plus-SMD
U2
1
Conn_01x02_Socket
J1
1
SW_SPDT
SW1
16
SW_Push
SW3, SW4, SW5, SW6, SW7, SW8, SW9, SW10 +8
2
SW_Push
SW19, SW20
18
D
D1, D2, D3, D4, D5, D6, D7, D8 +10

BLEkeyboard design files

The KiCad project lives in the hujohn1/keyboardstuff repository on GitHub; these links point at the commit this page was built from.

BLEkeyboard: common questions

What microcontroller does the BLEkeyboard use?

The BLEkeyboard is built around the XIAO-nRF52840-Plus-SMD, from the Nordic nRF family.

How big is the BLEkeyboard PCB?

The BLEkeyboard measures 90 × 130 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the BLEkeyboard?

40 components, from 7 distinct parts. The full bill of materials is listed on this page.

Where can I download the BLEkeyboard design files?

From the hujohn1/keyboardstuff repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the BLEkeyboard design in my own project?

The repository has no license, so all rights stay with hujohn1. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the BLEkeyboard 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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