HardLabs

Pmd tracker

ollielarkins·pmd-tracker·hardware/kicad/pmd-tracker.kicad_pcb

Pmd tracker PCB layout, top view — open source Nordic nRF board by ollielarkins

About the Pmd tracker PCB

Pmd tracker is an open source Nordic nRF PCB design by ollielarkins, published on GitHub. It is a 4-layer board measuring 45 × 30 mm, with 30 components from 19 distinct parts.

Its main chip is the MDBT50Q-1MV2, from the Nordic nRF family. Other key parts include the MAX-M10S-00B, ADXL372BCCZ-RL7, LSM6DSOTR, MCP73831T-2ACI/OT and AP2112K-3.3TRG1. By type, the board carries 12 capacitors, 7 resistors, 6 ICs, 3 connectors and 2 diodes.

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

From the project

Wearable rugby performance tracker: nRF52840 + Zephyr firmware, React Native companion app

A wearable performance tracker for rugby. It sits in a jersey pouch between the shoulder blades, records a player's match, and syncs the results to a companion app for review after the game.

KiCad 3D render of the 45 x 30 mm 4-layer board (not yet fabricated).

1. Sensing. A u-blox MAX-M10S GNSS module gives position at 10 Hz. An ADXL372 high-g accelerometer (±200 g) catches impacts that a normal IMU would clip. An LSM6DSO 6-axis IMU is part of the design but is not used by the metrics yet. 2. On-device metrics. The nRF52840 runs Zephyr RTOS. Every fix and accel sample goes through…

Pmd tracker, from the project README
From the project README

Main components on the Pmd tracker

MDBT50Q-1MV2MAX-M10S-00BADXL372BCCZ-RL7LSM6DSOTRMCP73831T-2ACI/OTAP2112K-3.3TRG1

Pmd tracker bill of materials (BOM)

30 components, 19 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MDBT50Q-1MV2
U1
1
MAX-M10S-00B
MAX-M10S
U2
1
ADXL372BCCZ-RL7
ADXL372
U3
1
LSM6DSOTR
LSM6DSO
U4
1
MCP73831T-2ACI/OT
MCP73831-2-OT
U5
1
AP2112K-3.3TRG1
AP2112K-3.3
U6
1
TYPE-C-31-M-12
USB-C
J1
1
U.FL-R-SMT-1(10)
U.FL
J2
1
S2B-PH-SM4-TB(LF)(SN)
JST PH 2-pin (battery)
J3
1
Green
D1
1
Red
D2
2
4.7U
4.7u
C1, C2
1
1u
C3
2
10U
10u
C4, C6
7
100N
100n
C5, C7, C8, C9, C10, C11, C12
2
5.1K
5.1k
R1, R2
1
4.7K
4.7k
R3
2
1k
R4, R5
2
1M
R6, R7

Pmd tracker design files

The KiCad project lives in the ollielarkins/pmd-tracker repository on GitHub; these links point at the commit this page was built from.

Pmd tracker: common questions

What microcontroller does the Pmd tracker use?

The Pmd tracker is built around the MDBT50Q-1MV2, from the Nordic nRF family.

How big is the Pmd tracker PCB?

The Pmd tracker measures 45 × 30 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Pmd tracker?

30 components, from 19 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 Pmd tracker design files?

From the ollielarkins/pmd-tracker 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 Pmd tracker design in my own project?

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

Can I test firmware for the Pmd tracker 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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