HardLabs

Slim-Sleep-Tracker

NicholasKorth·Slim-Sleep-Tracker·hardware/Tracker_PCB.kicad_pcb

Slim-Sleep-Tracker PCB layout, top view — open source Nordic nRF board by NicholasKorth

About the Slim-Sleep-Tracker PCB

Slim-Sleep-Tracker is an open source Nordic nRF PCB design by NicholasKorth, published on GitHub under the CC-BY-NC-4.0 license. It is a 4-layer board measuring 31.8 × 15.3 mm, with 57 components from 37 distinct parts.

Its main chip is the NRF52840-QIAA-R, from the Nordic nRF family. Other key parts include the MAXM86161EFD+T, GT-USB-7010ASV, BQ25120AYFPR, C2976675 and LSM6DSV16XTR. By type, the board carries 30 capacitors, 11 resistors, 7 ICs, 3 inductors, 2 crystals and 2 switches.

It belongs with the power & battery, sensors and rf & radio designs in this gallery.

From the project

A low-profile wrist wearable that measures motion, optical heart rate and SpO2 and streams them over Bluetooth LE to a PC visualizer.

A low-profile wrist wearable that measures motion, optical heart rate and SpO2 and streams them over Bluetooth LE to a PC visualizer.

3D renders from the board file: top side on the left, bottom (skin) side on the right. The optical sensor U1 has no 3D model and shows as bare pads.

The tracker is a 31.75 x 15.25 mm board worn on the inner wrist. The motion sensor, the optical heart-rate and SpO2 sensor and the skin temperature sensor sit on the bottom side, against the skin. The top side carries the nRF52840 microcontroller and radio, the USB-C charging port, the charger, two side buttons…

Slim-Sleep-Tracker, from the project README
From the project README

Main components on the Slim-Sleep-Tracker

MAXM86161EFD+TGT-USB-7010ASVBQ25120AYFPRC2976675LSM6DSV16XTRMAX30208CLB+TNRF52840-QIAA-R

Slim-Sleep-Tracker bill of materials (BOM)

57 components, 37 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MAXM86161EFD+T
U1
1
GT-USB-7010ASV
U2
1
BQ25120AYFPR
U3
1
C2976675
TS2306A 240GF MSM 9_C2976675
U4
1
LSM6DSV16XTR
U5
1
MAX30208CLB+T
U6
1
NRF52840-QIAA-R
U7
1
XKWEL89CLI-112YLC-32.768K
X1
1
XL4EL89CKI-111YLC-32M
X3
1
AMCA31-2R450G-S1F-T3
ANT1
2
GT-TC172A-H035-L1
SW1, SW2
1
ESD122DMXR
D1
1
MLP2012S2R2MT0S1
L1
1
CMI160808J100KT
L2
1
VHF100505H15NKT
L3
3
1UF
1uF
C1, C26, C27
4
10UF
10uF
C2, C3, C28, C31
1
4.7UF
4.7uF
C4
2
C0603-4µ7-6.3V-X7R
4.7µF
C5, C9
4
C0402-12p
12pF
C6, C7, C20, C21
Show 17 more
QtyPartRefs
4
C0402-100n
100nF
C8, C14, C16, C19
2
C0603-1µ0
1.0µF
C10, C12
1
C0603-4µ7-10V-X7S
4.7µF
C11
1
C0402-47n
47nF
C13
1
C0402-N.C.
100nF
C15
1
C0402-820p
820pF
C18
1
C0402-100p
100pF
C22
3
C0402-N.C.
N.C.
C23, C25, C34
2
.1uF
C29, C30
1
1.33K
1.33k
R1
1
523
R2
1
10K
10k
R3
1
3.3K
3.3k
R4
2
5.1K
5.1k
R5, R6
2
100K
100k
R7, R8
2
4.7K
4.7k
R9, R10
1
0
R13

Slim-Sleep-Tracker design files

The KiCad project lives in the NicholasKorth/Slim-Sleep-Tracker repository on GitHub; these links point at the commit this page was built from.

Slim-Sleep-Tracker: common questions

What microcontroller does the Slim-Sleep-Tracker use?

The Slim-Sleep-Tracker is built around the NRF52840-QIAA-R, from the Nordic nRF family.

How big is the Slim-Sleep-Tracker PCB?

The Slim-Sleep-Tracker measures 31.8 × 15.3 mm, has 4 copper layers and is 0.8 mm thick.

How many components are on the Slim-Sleep-Tracker?

57 components, from 37 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 Slim-Sleep-Tracker design files?

From the NicholasKorth/Slim-Sleep-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 Slim-Sleep-Tracker design in my own project?

It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.

Can I test firmware for the Slim-Sleep-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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