PCB Design for Silent Gaude Bracelet

Thought

flux

Here’s where we stand:

Work completed (Steps 1–7):

Project description and “System Architecture” property updated; mermaid diagram shared
Major ICs and modules added:
- ESP32-S3 (U1), LTE/GNSS U2, MEMS mic U6, MAX3010x U7, haptic driver U8, Li-ion charger U9, dual 3.3 V LDOs U10/U11, USB-C port J6, programming header H1, eSIM footprint U3, nano-SIM connector J7, battery connector J8
Supporting passives placed: decoupling caps C1–C21; ESD diodes U12/U13; CC resistors R6/R7
All nets through the schematic (power tree, I2S, I²C, UART, haptic, power connections) routed

Remaining tasks (Step 8 – PCB Layout Configuration):

Determine board length (Y extents + 5 mm margin) and set PCB outline to 10 mm width
Configure a 4-layer stackup with dedicated 3.3 V and GND internal planes
Set up ground-fill on signal layers and define RF keep-out for the LTE module
Place all components per wearable constraints (HR sensor on skin side, mic at outer edge, tall-part zoning, RF keep-out)

[No tasks were marked as not doable.]

Success Criteria Review:

✅ Schematic complete with all required components, correct decoupling, ESD, and connections
❌ PCB layout not yet configured (outline, stackup, placement, routing)

Next step: Let’s configure the PCB outline and stackup (flux-agentic-workflow: Prepare PCB Layout). We’ll size the board to 10 mm × (calculated length), set up the 4-layer stackup, and assign internal planes before component placement.

Flux stopped

Reviews

Generic Inductor
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Generic Resistor
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natarius

Project Name

Description

Silent Gaude: 10 mm 4‑Layer ESP32-S3 LTE/GNSS Wearable Bracelet

Layout Rules

Dimension Unit

Enabled

Yes

Grid Spacing

10mm

Layer

Top

Rotation Unit

deg

Properties

System Architecture

Diagram

Pricing & Availability

Distributor	Qty 1
Arrow	$26.75–$26.85
Digi-Key	$32.66–$95.06
LCSC	$86.03–$86.11
Mouser	$29.15–$29.16
TME	$0.00
Verical	$0.61–$6.65

Controls

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