Binary Wristwatch Design

flux

6:28

Thought for 5 sec

1/3 Size the wristwatch PCB and set 2-layer stackup

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Read layout.

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Editing board size.

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Editing board size.

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2/3 Place components with display-focused constraints

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3/3 Run post-placement DRC and summarize issues before routing checkpoint

Thought for a moment

I set up the PCB layout for the Coin Cell Binary Watch: resized it to a compact 45 mm × 38 mm rounded-rectangle wristwatch board, changed it to a standard 2-layer stackup, and placed all components.
Placement is complete: LEDs are arranged as the visible binary watch face, buttons are along the side for 3D-printed case pushers, the SWD programming header is on an edge, and the MCU/crystal/decoupling parts are grouped correctly. The placement tool reported no overlap or out-of-bounds issues.
I was blocked before I could run the final post-placement board review. Remaining work: run the placement review, then—after your approval—route the PCB traces and re-check the routed board.
cythonicpy

cythonicpy

Continue

flux

0:35

Thought for 4 sec

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1/4 Run post-placement DRC/airwire/dangling-trace review

Thought for 2 sec

Completed 5 design checks — found 50 issues.

Read layout.

Thought for 4 sec

2/5 Relieve routing congestion around MCU/programming header/buttons

Thought for a moment

Post-placement review shows the board is physically placed, but routing congestion is high around the MCU/SWD header/button area. I’m going to make a focused placement adjustment before routing so the autorouter has enough escape room.

flux

4:37

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3/5 Clean any stale dangling traces before routing

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Completed 4 design checks — found 50 issues.

Read layout.

Thought for 1 sec

4/5 Route the PCB

Thought for a moment

I adjusted the placement to reduce the worst congestion around the MCU and programming header. I’m starting routing now; the board is still compact, so I’ll verify carefully afterward.

flux

18:25

Thought for 1 sec

Routing complete!

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5/5 Run post-route DRC/ERC review and summarize remaining issues

Thought for 2 sec

Completed 8 design checks — found 3 issues.

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Routing complete!

Thought for 6 sec

Completed 8 design checks — found 2 issues.

Thought for 4 sec

Read layout.

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Read layout.

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Read schematic.

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5/5 tasks completed.

Thought for a moment

Continued the PCB layout work: I adjusted placement to reduce congestion, routed the board, removed one overlapping trace, and ran a cleanup routing pass.
Current status: the board is mostly routed, but 2 airwire issues remain, both tied to an automatically generated copper fill/stitching connection that I couldn’t safely delete with the available layout controls. There are no remaining overlapping-copper errors in the checked set; next step is a manual/targeted cleanup of that fill or a small routing/ground-pour adjustment before manufacturing export.
Find airwire nets
Locate fill issue
Fix ground pour
Assess manufacturability
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Coin Cell Binary Watch

Coin Cell Binary Watch thumbnail
Simple CR2032-powered binary wristwatch with a low-power MCU, readable LED bit display, pushbutton wake/time setting, and PCB shape suitable for a 3D-printed case.

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor

Qty 1

Arrow

$5.80–$7.41

Digi-Key

$7.99–$11.45

HQonline

$2.08

LCSC

$16.69–$16.92

Mouser

$12.88

TME

$1.68

Verical

$4.93–$94.04

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