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Borne keyboard

gibbz00·borne-keyboard·electronics/left/electronics.kicad_pcb

Borne keyboard PCB layout, top view — open source Nordic nRF board by gibbz00
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About the Borne keyboard PCB

Borne keyboard is an open source Nordic nRF PCB design by gibbz00, published on GitHub under the MPL-2.0 license. It is a 2-layer board measuring 109.6 × 73.9 mm, with 74 components from 34 distinct parts.

Its main chip is the nRF52840, from the Nordic nRF family. Other key parts include the UDFN6-6_1.2x1.0mm_P0.4mm and BQ24075RGT. By type, the board carries 26 capacitors, 22 switches, 12 resistors, 5 inductors, 3 ICs and 2 crystals.

It belongs with the keyboards, iot & wireless and power & battery designs in this gallery.

From the project

Wireless split 36-key keyboard.

V2 interest check is now live: https://www.reddit.com/r/mechmarket/comments/10xzn65/icbornev2aslimwirelessandsplitkeyboard/

Source files for the Borne Keyboard; a wireless, split, 36-key, orthogonal keyboard with a comparatively large battery capacity that should last over two months. Also of low profile at a max height of about 17 mm (0.67 in). Ready-made ZMK and Adafruit nrf52 bootloader binaries are placed in the firmware/builds directory.

Borne keyboard, from the project README
From the project README

Main components on the Borne keyboard

nRF52840UDFN6-6_1.2x1.0mm_P0.4mmBQ24075RGT

Borne keyboard bill of materials (BOM)

74 components, 34 distinct parts.

QtyPartRefs
1
nRF52840
U1
1
UDFN6-6_1.2x1.0mm_P0.4mm
U2
1
BQ24075RGT
U3
1
32.768 kHz
Y1
1
32MHz
Y2
1
USB_C_Receptacle_USB2.0
J1
1
Molex_781710002
J2
21
CPG135001S30
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +13
1
EVQPUC02K
SW22
2
LED_Dual_KKA
D1, D2
1
15nH
L1
2
10uH
L2, L3
1
2.2nH
L4
1
4.7nH
L5
3
1uF
C1, C7, C24
1
47nF
C2
6
4.7uF
C3, C5, C6, C11, C25, C26
1
1nF
C4
5
100nF
C8, C9, C10, C14, C23
1
100pF
C12
Show 14 more
QtyPartRefs
4
15pF
C13, C15, C21, C22
1
10nF
C16
1
1.5pF
C17
1
N.C
C18
1
1.2pF
C19
1
1.0pF
C20
2
2M
R1, R2
1
10M
R3
1
0R
R4
1
1.5k
R5
1
1M
R6
2
5.1k
R7, R8
3
10k
R9, R10, R11
1
3.9k
R12

Borne keyboard design files

The KiCad project lives in the gibbz00/borne-keyboard repository on GitHub; these links point at the commit this page was built from.

Borne keyboard: common questions

What microcontroller does the Borne keyboard use?

The Borne keyboard is built around the nRF52840, from the Nordic nRF family.

How big is the Borne keyboard PCB?

The Borne keyboard measures 109.6 × 73.9 mm, has 2 copper layers and is 1.2 mm thick.

How many components are on the Borne keyboard?

74 components, from 34 distinct parts. The full bill of materials is listed on this page.

Where can I download the Borne keyboard design files?

From the gibbz00/borne-keyboard repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Borne keyboard design in my own project?

Yes, under the terms of its MPL-2.0 license, which gibbz00 chose for the repository.

Can I test firmware for the Borne keyboard 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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