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Expansion board

lutztho·expansion-board

Expansion board layout, top view — open source Nordic nRF board by lutztho

About the Expansion board

Expansion board is an open source Nordic nRF PCB design by lutztho, published on GitHub. It is a 2-layer board measuring 17.8 × 21 mm, with 1 components from 1 distinct parts.

Its main chip is the XIAO BATTERY BOARD, from the Nordic nRF family.

It belongs with the rf & radio designs in this gallery.

From the project

Custom expansion board designed for the Seeed Studio XIAO nRF52840 paired with the Wio SX1262 LoRa module, tailored for Meshtastic deployments.

Expansion board, from the project README
From the project README

Expansion board bill of materials (BOM)

1 components, 1 distinct parts.

QtyPartRefs
1
XIAO BATTERY BOARD
J1

Expansion board design files

The KiCad project lives in the lutztho/expansion-board repository on GitHub; these links point at the commit this page was built from.

Expansion board: common questions

What microcontroller does the Expansion board use?

The Expansion board is built around the XIAO BATTERY BOARD, from the Nordic nRF family.

How big is the Expansion board?

The Expansion board measures 17.8 × 21 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Expansion board?

1 components, from 1 distinct parts. The full bill of materials is listed on this page.

Where can I download the Expansion board design files?

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

Can I use the Expansion board design in my own project?

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

Can I test firmware for the Expansion board 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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