CNC-Friendly XIAO Recorder Design

Create a CNC-friendly raw-laminate prototype variant of the XIAO Lapel Audio Recorder. Use a 70x50 mm single-sided or CNC-mill-friendly PCB style with wide traces, generous clearances, large through-hole pads, and holes for replaceable components. Keep the XIAO ESP32S3 Sense socketed on female headers, two external INMP441 I2S microphones, button, status LED, LiPo battery connector, and SD-card recording support. Prioritize hand soldering, easy replacement, and CNC trace isolation over compactness.

flux

0:27

Thought for 23 sec

Thought for a moment

I’ll convert the current layout into a CNC-friendly prototype variant: first I’ll inspect the schematic/layout, then set the board to 70×50 mm with a simple stackup and generous rules, then re-place components for hand soldering and CNC isolation, and finally run checks.

flux

6:30

Thought for 5 sec

Created 5 tasks.

1/5 Inspect current schematic, nets, layout, and existing rule state

Thought for 2 sec

Completed design checks — found 15 issues.

Read schematic.

Read layout.

Thought for 5 sec

2/5 Set 70x50 mm CNC-friendly board size and single-/2-layer prototype stackup

Thought for 3 sec

Editing board size.

Thought for 4 sec

3/5 Apply wide-trace, generous-clearance, hand-solder/CNC layout rules

Thought for 5 sec

Editing layout rules.

Thought for 5 sec

4/5 Re-place XIAO socket, microphones, SD support, button, LED, and LiPo connector for easy access and replacement

Thought for 3 sec

Thought for 11 sec

Thought for 2 sec

Thought for 9 sec

Thought for 1 sec

Thought for 8 sec

Thought for 1 sec

Thought for 10 sec

Thought for 1 min 12 sec

Thought for 7 sec

Thought for 26 sec

Thought for 11 sec

Thought for 4 sec

5/5 Run layout/electrical review and record any remaining issues

Thought for 2 sec

Completed design checks — found 38 issues.

Read layout.

Thought for 10 sec

5/5 tasks completed.

Thought for a moment

Created the CNC-friendly prototype variant.

Renamed it to XIAO Lapel Audio Recorder CNC Prototype and updated the description.
Resized the PCB to 70 × 50 mm, 2-layer/raw-laminate-friendly.
Applied wide-trace CNC rules: 0.8 mm default traces, 0.5 mm minimum, 0.8–1.0 mm keepouts, expanded pad openings, and hand-solder thermal relief.
Removed the old compact routing so it can be re-routed cleanly for CNC isolation.
Re-placed parts for hand soldering: XIAO socket/header area at the top, microphones spread left/right, LiPo connector on the bottom edge, button and LED on the front/bottom edge.

Review result: placement is usable with no overlap/out-of-board placement issues, but the board is intentionally unrouted now, so airwire errors remain. Manufacturer part number warnings also remain for generic passives and headers, which is expected for a prototype unless you want a finalized BOM.

Next step is routing with the new CNC-friendly wide traces. Want me to route it now?

Route top copper

Check CNC clearances

Add test pads

Show placement

Resistance

330 ohms

U2 D8_A8_SCK_GPIO7_TOUCH7 - J2 Pin_2

SW1 4 - LED1 K

R1 P2 - LED1 A

BAT_PLUS_XIAO_PAD

U2 3V3 - J2 Pin_5

U3 L/R - C1 P1

LED1

U2 TOUCH4_GPIO4_A3_D3 - J1 Pin_4

U2 D7_RX_GPIO44 - J2 Pin_1

U2 5V - J2 Pin_7

Manufacturer Part Number

113991115

GND

Resistance

100000 ohms

R1 P2 - LED1 A

GND

U2 GPIO43_TX_D6 - J1 Pin_7

U2 D9_A9_MISO_GPIO8_TOUCH8 - J2 Pin_3

GND

Capacitance

10 uF

U2 D10_A10_MOSI_GPIO9_TOUCH9 - J2 Pin_4

GND

Reviews

Generic Inductor
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16.1k
Generic Capacitor
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1.5M
Generic Resistor
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20.5M
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43.0M
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1.2M
CTL1206FYW1T
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1.1M
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jharwinbarrozo
700.5k

Project Name

XIAO Lapel Audio Recorder CNC Prototype

Description

70x50 mm CNC-friendly raw-laminate XIAO ESP32S3 lapel audio recorder prototype with socketed XIAO, dual external INMP441 microphones, LiPo connector, button/status LED, and SD-card recording support. Layout prioritizes hand soldering, replaceable parts, wide traces, and generous isolation clearances over compactness.

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor	Qty 1
Arrow	$13.50–$13.61
Digi-Key	$14.43
HQonline	$0.13
LCSC	$87.74
Mouser	$14.42
TME	$0.22
Verical	$13.40–$86.80

Controls

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x0f5c3 / XIAO Lapel Audio Recorder CNC Prototype

Schematic