PCB Design for Smart Ring

Worked for 36 mins 10 sec

flux

Fixed the PCB routing issues by converting this into a wider 80 mm × 16 mm EVT prototype board.

What is now fixed:

Widened the board and kept a 4-layer stackup.
Deleted all stale/bad routing.
Re-placed the full board for routability.
Reran autoroute successfully.
Removed leftover floating/dangling/overlap fragments.
Final PCB DRC now has:
- 0 airwires
- 0 overlapping copper
- 0 floating copper
- 0 dangling traces
- 0 missing footprints
- 0 invalid-layer errors

Intentional design changes made to close routing:

Removed the optional MP2662 charger INT connection.
Left the 32 MHz crystal shield/mechanical pads unconnected.
Marked unused U1 VBUS as intentional no-connect, though the ERC still reports it as missing power because USB is not used in this pogo-charged revision.

Still not fully assembly-ready:

45 generic parts still need MPNs for an assembled BOM.
U1 VBUS ERC remains as a justified false-positive/waiver for this no-USB prototype.

Bottom line: the PCB layout is now electrically routed and DRC-clean for routing/manufacturing geometry. Next step is BOM cleanup/MPN assignment before ordering assembled boards.

mustafamasody

how can I download this as a DXF file

Thought for 8 sec

flux

To download a DXF from Flux:

Open the project.
Go to the Files / Export area.
Choose an export option for the PCB/mechanical data.
Select DXF if available.
Download the generated file from the Files tab.

If you specifically need a board outline DXF for the mechanical enclosure/ring band:

Export the PCB outline/mechanical layer as DXF.
Use that DXF in CAD to design the enclosure, flex outline, dock, or ring carrier.

If you do not see DXF as an export option, use the manufacturing/mechanical export options available in Flux, or export Gerbers and convert the board outline/mechanical layer to DXF in your mechanical CAD workflow.

Export DXF

Export manufacturing files

Fix BOM MPNs

Run final review

Create assembly notes

U5 VO - TP_3V0 P1

U2 *IRQ - U1 P0.17

TP_CHG+ P1 - U4 IN

U1 XC1 - Y1 1

U1 SWDIO - TP_SWDIO P1

U1 DEC1 - C18 P1

U3 IN/TRIG - U1 P0.04_AIN2

U4 NTC - R4 P2

U1 ANT - C21 P1

U4 SYS - U5 VI

U1 DEC4 - U1 DEC6

U1 P0.00_XL1 - Y2 ~

U5 VO - TP_3V0 P1

U1 P0.18_nRESET - TP_RESET P1

U5 VO - TP_3V0 P1

U1 SWDCLK - TP_SWDCLK P1

U3 EN - U1 P0.20

U1 P0.01_XL2 - Y2 ~

U1 DEC4 - U1 DEC6

U1 P0.11 - U2 SCL

U1 DEC5 - C23 P1

U1 XC2 - Y1 3

U1 P0.15 - U2 SDA

U1 DEC3 - C20 P1

U4 BATT - TP_BAT+ P1

C9 P2 - C3 P2

Reviews

Generic Inductor
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Generic Resistor
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Project Name

MinaRing Prayer Companion

Description

Rigid-flex smart ring for Islamic prayer companion use, with compact BLE SoC, capacitive swipe electrodes, haptic feedback, rechargeable battery power, and body-worn BLE antenna constraints.

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor	Qty 1
Arrow	$5.05–$5.53
Digi-Key	$5.75
HQonline	$9.13
LCSC	$4.56
Mouser	$2.10
Verical	$10.97–$12.70

Controls

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mustafamasody / MinaRing Prayer Companion

Schematic