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Mecahnical Keyboard

AU199·Mecahnical_Keyboard·PCB/Single.kicad_pcb

Mecahnical Keyboard PCB layout, top view — open source Nordic nRF board by AU199

About the Mecahnical Keyboard PCB

Mecahnical Keyboard is an open source Nordic nRF PCB design by AU199, published on GitHub under the MIT license. It is a 2-layer board measuring 317.3 × 143.3 mm, with 131 components from 17 distinct parts.

Its main chip is the XIAO-nRF52840-SMD, from the Nordic nRF family. Other key parts include the MCP23017_SO. By type, the board carries 61 switches, 61 diodes, 3 capacitors, 3 resistors and 2 ICs.

It belongs with the keyboards designs in this gallery.

From the project

BOM (Used an program for this to convert to a table in a .md file) | Item | Description | Quantity | Total Price | shipping | Link | Running Total | Comments | | ------------------------------- | ----------------------------------------------------------- | -------- | -----------

BOM (Used an program for this to convert to a table in a .md file) | Item | Description | Quantity | Total Price | shipping | Link | Running Total | Comments | | ------------------------------- | ----------------------------------------------------------- | -------- | ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------- |…

Mecahnical Keyboard, from the project README
From the project README

Main components on the Mecahnical Keyboard

MCP23017_SOXIAO-nRF52840-SMD

Mecahnical Keyboard bill of materials (BOM)

131 components, 17 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MCP23017_SO
U2
1
XIAO-nRF52840-SMD
U3
1
R_Array_SIP6
Resistor chain1
46
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +38
2
SW_Push
SW22, SW59
1
SW_Push
SW33
1
SW_Push
SW34
2
SW_Push
SW44, SW62
7
SW_Push
SW48, SW49, SW50, SW51, SW53, SW54, SW55
1
SW_Push
SW52
1
SW_Push
SW56
61
D
D1, D2, D3, D4, D5, D6, D7, D8 +53
1
C1
C1
1
C2
C2
1
C_0402_1005Metric
C3
2
R_45deg
R3, R4
1
R_0402_1005Metric
R5

Mecahnical Keyboard design files

The KiCad project lives in the AU199/Mecahnical_Keyboard repository on GitHub; these links point at the commit this page was built from.

Mecahnical Keyboard: common questions

What microcontroller does the Mecahnical Keyboard use?

The Mecahnical Keyboard is built around the XIAO-nRF52840-SMD, from the Nordic nRF family.

How big is the Mecahnical Keyboard PCB?

The Mecahnical Keyboard measures 317.3 × 143.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mecahnical Keyboard?

131 components, from 17 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 Mecahnical Keyboard design files?

From the AU199/Mecahnical_Keyboard 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 Mecahnical Keyboard design in my own project?

Yes, under the terms of its MIT license, which AU199 chose for the repository.

Can I test firmware for the Mecahnical 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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