Floating Copper Error Fix

Thought for 1 min 10 sec

You’re right to push back. I may have relied on stale review output earlier, and I also misread the function of the VCC pins on U2 and U4.

What I can say from the current project data I can access is:

What the current checks still report

Table

Check	Current tool result	My take
Airwires	Still reported by the review service	This conflicts with what you’re seeing in the editor
Floating copper	Still reported by the review service	Same conflict
Missing power on U2:VCC	Reported	Likely a false ERC classification
Missing power on U4:VCC	Reported	Very likely a false ERC classification
NC connected on U4	Reported	Could be a symbol/part-model issue if the datasheet shows copper there
Single-pin nets on U1 SWD pins	Reported	Likely because your programming pads aren’t represented as connected component pins in schematic/ERC

What the datasheet-backed evidence says

For U2, the datasheet tool confirms:

VCC = internal LDO output pin
Connect with a 1 µF capacitor to GND

So my earlier statement that U2 VCC should be driven as a power input was wrong.

For U4, I couldn’t retrieve the datasheet through the project metadata, but your quoted text indicates the same pattern:

VCC = internal 5 V LDO output
Bypass with 1 µF to GND
Not a normal power-input pin

So the ERC on U4:VCC also sounds like a part pin-type mismatch, not a board defect.

Revised pre-order assessment

Given your clarification, I would not treat these three items as automatic fab blockers:

U2 VCC “missing power”
U4 VCC “missing power”
U4 NC connected, if that copper treatment matches the datasheet-recommended layout

And I would also not treat the SWD single-pin warnings as a functional issue by themselves if your debug access is intentionally through exposed pads like SWDIO, SWCLK, RESET, VDD, and GROUND.

So should you order it?

Maybe yes, but only after a quick sanity pass on the real hardware risks, not the misleading ERC labels.

Real things I would verify before ordering

Table

Area	Why
Footprints for U1, U2, U3, U4	Package mismatch is a real bring-up killer
Polarity/orientation of D21, D22, D23, D24, D25	TVS/diode orientation mistakes are common
Decoupling placement for U1, U2, U4	More important than schematic cleanliness at order time
High-current loop around U4, L2, input/output capacitors	This is a real power-layout risk
LED current paths around Q1, Q2, Q3, Q4, Q5	Check trace width, return path, thermal spreading
Programming pad accessibility for SWDIO, SWCLK, RESET	Mechanical usability issue, not ERC

Bottom line

I do not trust my earlier “don’t order it” conclusion.
Your explanation makes the U2 and U4 VCC warnings look like false positives.
The U4 NC warning may also be a library/symbol-rule mismatch if it follows the datasheet.
The SWD warnings sound intentional given your pogo/wire pads.

If you want, I can do a fresh board-signoff pass focused only on real manufacturing risks:

power layout around U4
decoupling placement for U1, U2, U4
polarity/orientation audit
debug/programming accessibility audit

That would be a much better pre-order review than relying on those ERC messages.

Review U4 layout

Check current DRC

Inspect U4 connections

Audit programming pads

Buck voltage regulator to take 12V down to 6.25V. Each pair of Amber LEDs to rec...

acolborn

Buck voltage regulator to take 12V down to 6.25V. Each pair of Amber LEDs to receive 6.25V and will be individually PWM'd to make a progressive turn signal.

3mo

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GND2

C10

Capacitance

68uF

GND7

12V

Capacitance

1nF

C11

Capacitance

1uF

Capacitance

100nF

6.25V

Capacitance

10nF

12V

Capacitance

10uF

C17

Capacitance

100nF

VDD

C16

Capacitance

4.7uF

Capacitance

10uF

GND1

GND8

12V

RESET

R11

Resistance

10kΩ

Resistance

1 Ω

End of Life

GND4

D25

R22

Resistance

10kΩ

R19

Resistance

22 Ω

SWDIO

VDD

R21

Resistance

19.1kΩ

GND5

Analog Dim

Resistance

1 Ω

Resistance

400mΩ

R10

Resistance

2.2kΩ

GND

R20

Resistance

100kΩ

Resistance

10kΩ

SWCLK

R12

Resistance

2.2kΩ

Reviews

Project Name

Delicious Scarlet Proton Packs

Description

Add Tag-Connect SWD Programming Interface for MSPM0C1104-Q1

Properties

System Architecture

Diagram

Pricing & Availability

Distributor	Qty 1
Arrow	$17.15–$18.97
Digi-Key	$3.27–$3.66
HQonline	$0.32
LCSC	$27.04–$27.53
Mouser	$48.33–$49.33
TME	$0.84–$0.87
Verical	$4.06–$82.01

Controls

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acolborn / Delicious Scarlet Proton Packs

Schematic