HardLabs

Aura a04

Avinash1286·pendent·hardware/a04/aura-a04.kicad_pcb

Aura a04 PCB layout, top view — open source Nordic nRF board by Avinash1286
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About the Aura a04 PCB

Aura a04 is an open source Nordic nRF PCB design by Avinash1286, published on GitHub under the MIT license. It is a 4-layer board measuring 35.2 × 35.2 mm, with 72 components from 37 distinct parts.

Its main chip is the MDBT50Q-1MV2, from the Nordic nRF family. Other key parts include the BQ25186DLHR, W25N01GVZEIG, TLV75530PDBVR, MAX17048G+T10 and DRV2605LDGSR. By type, the board carries 27 resistors, 19 capacitors, 10 ICs, 4 connectors, 3 switches and 3 LEDs.

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

From the project

AURA: open wearable note-taking device development — PCB, printable case, firmware, Next.js/Convex notes, interactive 3D site and launch film.

Status: incomplete engineering design, not a fabrication release. This project starts from a new native KiCad project, schematic hierarchy and board; it does not import the routed A03 board as a template. All new CAD mutations are made through KiCad MCP. Existing exact-MPN library definitions may be consulted or reused after verification.

The full A04 objective includes the circular pendant, real manufacturing and printable-part checks, firmware, mobile/context workflow, website, film and physical launch qualification. These files are one workstream toward that objective.

Main components on the Aura a04

MDBT50Q-1MV2BQ25186DLHRW25N01GVZEIGTLV75530PDBVRMAX17048G+T10DRV2605LDGSRSN74LVC2G125DCURTLV6700DDCRMX25R3235FM1IL0

Aura a04 bill of materials (BOM)

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

QtyPartRefs
1
MDBT50Q-1MV2
Raytac
U1
1
BQ25186DLHR
Texas Instruments
U2
1
W25N01GVZEIG
U3
2
TLV75530PDBVR
U4, U7
1
MAX17048G+T10
U5
1
DRV2605LDGSR
U6
1
SN74LVC2G125DCUR
U8
1
TLV6700DDCR
U9
1
MX25R3235FM1IL0
Macronix
U10
2
DMG2302UK-7
Q1, Q2
1
AURA-A04-DOCK-CONTACTS
J1
1
AURA-A04-BATTERY-PADS
J2
1
AURA-A04-SWD-PADS
J3
1
AURA-A04-MOTOR-PADS
J4
2
SPH0641LU4H-1
MK1, MK2
1
JS202011JCQN
SW1
2
KMR211NGULCLFS
SW2, SW3
1
LTST-C190KFKT
Amber hard recording indicator
LED1
2
LTST-C190KFKT
Amber perimeter emitter
LED2, LED3
1
BAT54WS-7-F
D1
Show 17 more
QtyPartRefs
1
TPD1E10B06DYAR
Texas Instruments
D2
6
C0402C104K4RACTU
100nF
C1, C5, C11, C16, C18, C19
4
C0603C475K8PACTU
4.7uF
C2, C6, C8, C12
2
939113424610-T3N
100nF silicon
C3, C4
1
GRM188R61E475KE11D
4.7uF / 25V
Murata
C7
1
C0805C106K8PACTU
10uF
C9
1
C0603C225K8RACTU
2.2uF
C10
3
C0603C105K4RACTU
1uF
C13, C14, C15
1
C0402C103K5RACTU
10nF
C17
13
RC0402FR-0710KL
10k
R1, R2, R3, R4, R5, R11, R13, R18 +5
2
RC0402FR-074K7L
4.7k
R6, R7
5
RC0402FR-07100KL
100k
R8, R9, R10, R15, R26
1
RC0402FR-072K2L
2.2k
R14
2
RC0402FR-0733RL
33
R16, R17
1
RC0402FR-073K3L
3.3k
R22
1
RC0402FR-07100RL
100
R25
2
RC0402FR-071KL
1k
R27, R28

Aura a04 design files

The KiCad project lives in the Avinash1286/pendent repository on GitHub; these links point at the commit this page was built from.

Aura a04: common questions

What microcontroller does the Aura a04 use?

The Aura a04 is built around the MDBT50Q-1MV2, from the Nordic nRF family.

How big is the Aura a04 PCB?

The Aura a04 measures 35.2 × 35.2 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Aura a04?

72 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 Aura a04 design files?

From the Avinash1286/pendent 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 Aura a04 design in my own project?

Yes, under the terms of its MIT license, which Avinash1286 chose for the repository.

Can I test firmware for the Aura a04 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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