HardLabs

Left

Stogalosu·BlueSplit42·PCB/left.kicad_pcb

Left PCB layout, top view — open source Nordic nRF board by Stogalosu

About the Left PCB

Left is an open source Nordic nRF PCB design by Stogalosu, published on GitHub. It is a 2-layer board measuring 138 × 111.6 mm, with 45 components from 5 distinct parts.

Its main chip is the XIAO-nRF52840-SMD, from the Nordic nRF family. By type, the board carries 21 switches, 21 diodes, 2 resistors and 1 IC.

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

From the project

A custom wireless split keyboard designed by me and my brother with the help of a guide

Bom table |Name |Unit Price|Shipping|Amount|Total Cost|Notes |Link | |-----------------------------|----------|--------|------|----------|-----------------------------------|-----------------------------------------------------| |Case |$0.00 |$0.00 |1 |$0.00 |3D Printed in-house |No link | |Keycaps |$0.00 |$0.00 |1 |$0.00 |3D Printed in-house |No link | |Gateron Milky Yellow Switches|$15.46 |$0.00 |1 |$15.46 |50pcs |https://www.aliexpress.com/item/1005006425450443.html| |Hotswap Sockets |$4.79 |$0.00 |1 |$4.79 |70pcs/Color: Type 1 |https://www.aliexpress.com/item/1005008954571807.html|…

Left, from the project README
From the project README

Main components on the Left

XIAO-nRF52840-SMD

Left bill of materials (BOM)

45 components, 5 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
XIAO-nRF52840-SMD
U1
21
SW_Push
SW1, SW3, SW5, SW6, SW9, SW11, SW12, SW13 +13
21
D
D1, D3, D5, D6, D9, D11, D12, D13 +13
1
806K
R1
1
2M
R3

Left design files

The KiCad project lives in the Stogalosu/BlueSplit42 repository on GitHub; these links point at the commit this page was built from.

Left: common questions

What microcontroller does the Left use?

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

How big is the Left PCB?

The Left measures 138 × 111.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Left?

45 components, from 5 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 Left design files?

From the Stogalosu/BlueSplit42 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 Left design in my own project?

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

Can I test firmware for the Left 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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