HardLabs

MSBE V3

Monty103·MSBE_v3·hardware/kicad/ver_1.0/MSBE_V3.kicad_pcb

MSBE V3 PCB layout, top view — open source Nordic nRF board by Monty103

About the MSBE V3 PCB

MSBE V3 is an open source Nordic nRF PCB design by Monty103, published on GitHub. It is a 4-layer board measuring 49.3 × 60.1 mm, with 88 components from 44 distinct parts.

Its main chip is the NRF5340-QKAA-R, from the Nordic nRF family. Other key parts include the BMA400, MPR121QR2, NPM1100-CAAA-R7 and MAX98357AEWL_T. By type, the board carries 40 capacitors, 22 resistors, 7 connectors, 5 ICs, 5 inductors and 3 speakers.

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

From the project

An ultra-compact, low-power wearable audio device featuring bone-conduction technology, digital PDM voice capture, and multi-gesture touch controls.

Main components on the MSBE V3

BMA400MPR121QR2NRF5340-QKAA-RNPM1100-CAAA-R7MAX98357AEWL_T

MSBE V3 bill of materials (BOM)

88 components, 44 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
BMA400
U1
1
MPR121QR2
U2
1
NRF5340-QKAA-R
U3
1
NPM1100-CAAA-R7
U4
1
MAX98357AEWL_T
U6
1
32MHZ
32MHz
Y1
1
32.768KHZ
32.768kHz
Y2
1
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J1
1
Touch Pads
J2
1
UART
J3
1
Prog
J4
1
High-V
J6
1
Low-V
J8
1
Low-V-TH
J9
1
Antenna_Shield
AE1
1
Battery_Cell
BT1
1
SPH18R1LM4H-1-8
LS1
2
Boneconduction
LS4, LS5
2
LED
D1, D2
1
N.M.
L1
Show 24 more
QtyPartRefs
1
2.2NH
2.2nH
L2
2
10UH
10uH
L3, L4
1
2.2UH
2.2uH
L5
12
100NF
100nF
C1, C10, C11, C18, C30, C31, C33, C34 +4
3
0.1UF
0.1uF
C2, C9, C23
3
N.M.
C3, C4, C5
1
0.7PF
0.7pF
C6
2
12PF
12pF
C7, C8
5
1UF
1uF
C12, C13, C15, C17, C20
3
4.7UF
4.7uF
C14, C16, C21
1
2.2NF
2.2nF
C19
4
10UF
10uF
C25, C26, C27, C28
1
47UF
47uF
C32
5
30PF
30pF
C42, C45, C49, C50, C51
1
75K
75k
R1
3
5K1R
R2, R3, R5
1
2R2
R4
1
10K
R6
1
N.C.
R8
2
4K7
4k7
R9, R10
2
1K5R
R11, R12
5
1K5
R14, R15, R18, R22, R23
5
1K8
R16, R17, R19, R24, R25
1
680K
680k
R34

MSBE V3 design files

The KiCad project lives in the Monty103/MSBE_v3 repository on GitHub; these links point at the commit this page was built from.

MSBE V3: common questions

What microcontroller does the MSBE V3 use?

The MSBE V3 is built around the NRF5340-QKAA-R, from the Nordic nRF family.

How big is the MSBE V3 PCB?

The MSBE V3 measures 49.3 × 60.1 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the MSBE V3?

88 components, from 44 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 MSBE V3 design files?

From the Monty103/MSBE_v3 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 MSBE V3 design in my own project?

The repository has no license, so all rights stay with Monty103. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the MSBE V3 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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