HardLabs

BabyMonitor

kparham0216·BabyMonitorPCB

BabyMonitor PCB layout, top view — open source Nordic nRF board by kparham0216

About the BabyMonitor PCB

BabyMonitor is an open source Nordic nRF PCB design by kparham0216, published on GitHub. It is a 2-layer board measuring 88.4 × 65 mm, with 64 components from 38 distinct parts.

Its main chip is the nRF52840, from the Nordic nRF family. Other key parts include the MAX30102, Dip', MCUEn, JST and MAX30205. By type, the board carries 20 resistors, 19 capacitors, 10 ICs, 6 connectors, 5 diodes and 2 switches.

It belongs with the sensors designs in this gallery.

From the project

KiCad PCB design for the Baby Monitor's custom nRF52840-based sensor board (Board1).

KiCad PCB design for the Baby Monitor's custom nRF52840-based sensor board (Board1).

- KiCad 9.0 or later (project uses format version 9.0)

1. Install KiCad 9.0+ from kicad.org/download 2. Launch KiCad 3. Go to File → Open Project... 4. Navigate to the PCB/BabyMonitorPCB directory 5. Select Board1.kicadpro and click Open**

The KiCad project manager will show the schematic and PCB layout. From there:

Main components on the BabyMonitor

nRF52840MAX30102Dip'MCUEnJSTMAX302053.3V1.8VUSB SwitchPower Mgr

BabyMonitor bill of materials (BOM)

64 components, 38 distinct parts.

QtyPartRefs
1
nRF52840
U1
1
MAX30102
U2
1
Dip'
U3
1
MCUEn
U4
1
JST
U5
1
MAX30205
U6
1
3.3V
U7
1
1.8V
U9
1
USB Switch
U12
1
Power Mgr
U13
1
32MHz
Y1
1
Receptacle
J1
1
Test_30102_VDD
J2
1
Test_30102_VLED+
J3
1
Test_30205_VDD
J4
1
Test_MCU_VDD
J6
1
SWD
J7
1
Reset
SW1
1
Dip
SW2
1
LDOEn
D2
Show 18 more
QtyPartRefs
1
DIPOn
D3
1
3V3Rail
D4
1
ChrgLED
D6
1
VDDLED
D7
1
4.7n
L1
1
0.8p
C1
1
0.5p
C2
6
4.7u
C4, C8, C9, C11, C12, C20
4
1u
C5, C13, C14, C16
4
0.1u
C6, C7, C10, C19
1
0.1n
C15
2
8p
C21, C22
7
10k
R1, R6, R7, R11, R12, R13, R16
2
5.1k
R2, R3
1
100k
R4
4
47
R5, R17, R18, R19
4
4.7k
R8, R14, R15, R20
2
2k
R9, R10

BabyMonitor design files

The KiCad project lives in the kparham0216/BabyMonitorPCB repository on GitHub; these links point at the commit this page was built from.

BabyMonitor: common questions

What microcontroller does the BabyMonitor use?

The BabyMonitor is built around the nRF52840, from the Nordic nRF family.

How big is the BabyMonitor PCB?

The BabyMonitor measures 88.4 × 65 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the BabyMonitor?

64 components, from 38 distinct parts. The full bill of materials is listed on this page.

Where can I download the BabyMonitor design files?

From the kparham0216/BabyMonitorPCB repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the BabyMonitor design in my own project?

The repository has no license, so all rights stay with kparham0216. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the BabyMonitor 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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