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NRF52840 Modular Wireless SoM

anhenaobe·nrf52840-modular-wireless-som·hardware/current/qfaa/keyboard_QFAA.kicad_pcb

NRF52840 Modular Wireless SoM PCB layout, top view — open source Nordic nRF board by anhenaobe

About the NRF52840 Modular Wireless SoM PCB

NRF52840 Modular Wireless SoM is an open source Nordic nRF PCB design by anhenaobe, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 30 × 34.6 mm, with 52 components from 35 distinct parts.

Its main chip is the NRF52840-QFAA-F-R7, from the Nordic nRF family. Other key parts include the MCP73871T-2CCI/ML and TPS63031DSKR. By type, the board carries 24 capacitors, 11 resistors, 5 inductors, 3 ICs, 3 diodes and 2 crystals.

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

From the project

Reusable four-layer nRF52840 wireless SoM with BLE, USB-C, LiPo charging, buck-boost power management, RF antenna integration, and manufacturing-ready outputs.

A reusable four-layer wireless System-on-Module based on the Nordic nRF52840-QFAA, designed for integration into future carrier boards. The electrical design and PCB layout exist as a mature prototype candidate, but the board has not yet been fabricated or physically validated.

- nRF52840-QFAA Bluetooth Low Energy-capable MCU (U1). - USB-C connector used for power input only; USB data is not implemented. - MCP73871 single-cell LiPo charger and power-path controller (U2). - TPS63031 fixed 3.3 V buck-boost regulator (U4). - Johanson 2450AT18A100E ceramic 2.4 GHz antenna (AE1). - Nordic-style…

NRF52840 Modular Wireless SoM, from the project README
From the project README

Main components on the NRF52840 Modular Wireless SoM

NRF52840-QFAA-F-R7MCP73871T-2CCI/MLTPS63031DSKR

NRF52840 Modular Wireless SoM bill of materials (BOM)

52 components, 35 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
NRF52840-QFAA-F-R7
U1
1
MCP73871T-2CCI/ML
MCP73871
U2
1
TPS63031DSKR
TPS63031DSK
U4
1
X322532MOB4SI
Crystal_GND24
Y1
1
Q13FC13500004
Crystal
Y2
1
USB-TYPE-C-009
USB_C_Receptacle_PowerOnly_6P
J6
1
2450AT18A100E
Antenna
AE1
1
MSK12C02
SW2
1
RC0603FR-0710KL
10k
TH1
3
KT-0603R
LED
D1, D2, D3
1
SDCL1005C4N7STDF
4.7nH
L1
1
LQG15HS2N2S02D
2.2nH
L2
1
LQW15DN100M00D
10uH
L3
1
LQG15HS15NJ02D
15nH
L4
1
SDFL1005Q1R5KTF
1.5uH
L5
1
0402CG1R0C500NT
1.0pF
C1
1
0402CG1R2C500NT
1.2pF
C2
1
0402WGF0000TCE
Z2
C4
1
CL21A106KAYNNNE
10uF
C6
3
CL10A106KP8NNNC
10uF
C7, C27, C32
Show 15 more
QtyPartRefs
1
CC0603KRX7R9BB104
0.1uF
C8
3
CL10A475KO8NNNC
4.7uF
C9, C10, C26
4
0402CG120J500NT
12pF
C11, C12, C28, C29
1
CC0603KRX7R9BB104
100nF
C13
1
CL10A105KB8NNNC
1uF
C14
1
CL05A105KA5NQNC
1uF
C15
4
CL05B104KO5NNNC
100nF
C17, C18, C22, C23
1
0402CG101J500NT
100pF
C19
1
CL05B103KB5NNNC
10nF
C30
3
0603WAF1001T5E
1k
R1, R2, R4
2
RC0603FR-0710KL
10k
R3, R6
1
0603WAF2001T5E
2k
R5
1
0603WAF1003T5E
100k
R7
2
0603WAF5101T5E
5.1k
R9, R10
2
0603WAF2004T5E
2M
R11, R12

NRF52840 Modular Wireless SoM design files

The KiCad project lives in the anhenaobe/nrf52840-modular-wireless-som repository on GitHub; these links point at the commit this page was built from.

NRF52840 Modular Wireless SoM: common questions

What microcontroller does the NRF52840 Modular Wireless SoM use?

The NRF52840 Modular Wireless SoM is built around the NRF52840-QFAA-F-R7, from the Nordic nRF family.

How big is the NRF52840 Modular Wireless SoM PCB?

The NRF52840 Modular Wireless SoM measures 30 × 34.6 mm, has 4 copper layers and is 1.0192 mm thick.

How many components are on the NRF52840 Modular Wireless SoM?

52 components, from 35 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 NRF52840 Modular Wireless SoM design files?

From the anhenaobe/nrf52840-modular-wireless-som 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 NRF52840 Modular Wireless SoM design in my own project?

Yes, under the terms of its GPL-3.0 license, which anhenaobe chose for the repository.

Can I test firmware for the NRF52840 Modular Wireless SoM 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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