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AWatch2-hw

jwise·aWatch2-hw

AWatch2-hw PCB layout, top view — open source Nordic nRF board by jwise

About the AWatch2-hw PCB

AWatch2-hw is an open source Nordic nRF PCB design by jwise, published on GitHub. It is a 4-layer board measuring 73.4 × 72.7 mm, with 157 components from 45 distinct parts.

Its main chip is the NRF52840, from the Nordic nRF family. Other key parts include the MAX14690A, W25Q128JVPIQTR, BMM150, APDS-9306-065 and BMI160. By type, the board carries 66 resistors, 54 capacitors, 13 ICs, 7 connectors, 6 inductors and 4 switches.

From the project

hardware for aWatch2

Main components on the AWatch2-hw

NRF52840MAX14690AW25Q128JVPIQTRBMM150APDS-9306-065BMI160BMP388SPK0641HT4H-1AYF531035 (LS013B7DH05)AT93C46DN-SH-TMCP1703A-3302_SOT223FT2232HLDRV2604

AWatch2-hw bill of materials (BOM)

157 components, 45 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
NRF52840
nRF52840
U1
1
MAX14690A
U301
1
W25Q128JVPIQTR
U401
1
BMM150
U501
1
APDS-9306-065
U502
1
BMI160
U503
1
BMP388
U504
1
SPK0641HT4H-1
U601
1
AYF531035 (LS013B7DH05)
U701
1
AT93C46DN-SH-T
U801
1
MCP1703A-3302_SOT223
U802
1
FT2232HL
U803
1
DRV2604
U901
1
FDV301N
Q701
1
ABM11W-32.0000MHZ-8-B1U-T3
X1
1
FH1200004
Y801
5
CONN_01X02
Conn_01x02
J101, J102, J103, J104, J301
1
Molex 1050170001
J801
1
CONN_01X06
Conn_01x06
J802
1
Logo
G1
Show 25 more
QtyPartRefs
4
B3S-1000
SW101, SW102, SW103, SW104
3
SPMWHT541ML5XATMS0
D701, D702, D703
1
3.8NH
3.8nH
L1
1
10µH
L2
1
15NH
15nH
L3
1
2.2µH
L301
2
bead
L801, L802
2
10pF NP0
C1, C2
2
1.0pF NP0
C3, C4
26
0.1µF X7R
C5, C7, C8, C12, C402, C502, C503, C505 +18
4
4.7µF X7R
C6, C804, C806, C808
1
820pF NP0
C9
1
100pF NP0
C11
12
1.0µF X7R
C14, C15, C301, C302, C303, C306, C401, C501 +4
2
?pF NP0
C201, C202
2
10µF X5R
C304, C305
2
22pF NP0
C805, C807
8
2.2K
2.2k
R1, R2, R3, R4, R510, R511, R802, R806
8
10K
10k
R201, R302, R307, R801, R803, R804, R816, R817
3
n/c
R202, R501, R502
40
0
R301, R303, R305, R306, R503, R504, R505, R506 +32
1
12.4K
12.4k
R304
4
160
R704, R705, R706, R808
1
12k 1%
R805
1
470
R807

AWatch2-hw design files

The KiCad project lives in the jwise/aWatch2-hw repository on GitHub; these links point at the commit this page was built from.

AWatch2-hw: common questions

What microcontroller does the AWatch2-hw use?

The AWatch2-hw is built around the NRF52840, from the Nordic nRF family.

How big is the AWatch2-hw PCB?

The AWatch2-hw measures 73.4 × 72.7 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the AWatch2-hw?

157 components, from 45 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 AWatch2-hw design files?

From the jwise/aWatch2-hw repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the AWatch2-hw design in my own project?

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

Can I test firmware for the AWatch2-hw 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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