ISP1907 Part Swap

Thought for 5 sec

I’ll inspect that exact via and its applied rules so I can give you the precise fields and selector that worked.

Thought for 19 sec

The via was reduced by applying the project ruleset “U1 escape vias” to the via’s full PCB node ID:

Text
[uid="ab203441-d5da-4e1a-bbff-4206d0ec2e14.throughHole.0-0"]

The four fields that worked were:

Text
Size X:      0.4 mm
Size Y:      0.4 mm
Hole Size X: 0.2 mm
Hole Size Y: 0.2 mm

Verified computed result:

Copper outer size: 0.4 × 0.4 mm
Drill/hole: 0.2 × 0.2 mm

Important details for the other agent:

Target the generated through-hole child node, including the .throughHole.0-0 suffix—not just the base object UUID.
Use sizeX and sizeY; the scalar size field did not produce the desired result here.
Use holeSizeX and holeSizeY; the scalar holeSize field was also ineffective in this workflow.
The via’s inline defaults may still display 0.6/0.3 mm, but the ruleset overrides them and the computed rules should show 0.4/0.2 mm.

Verify vias and BOM

Verify small vias

Check BOM MPNs

Clean obsolete rules

Run final DRC

Files

Schematic

Layout

Preview

Regulatory and Safety Notes — Light Pendant V2

Applicability

This design includes a BLE radio module and a rechargeable LiPo battery connection. Onboard charging has been removed, so battery charging safety depends on the selected external single-cell LiPo charger and/or protected battery pack.

FCC/CE Technical Construction File Draft

Table

Item	Current Status
Product	Light Pendant V2 ambient-light tracking wearable
Wireless module	U1 ISP1807-LR-RS, BLE / nRF52840-based
Frequency band	2.402-2.480 GHz BLE
Antenna	Integrated module antenna
RF layout condition	Must follow ISP1807 antenna keepout: no metal/traces/components on any application PCB layer in keepout
Module certification	TBD: verify FCC ID / CE RED evidence for exact ISP1807-LR-RS variant

Required Compliance Artifacts

Schematic: available in Flux after this design phase.
BOM: available from schematic after component finalization.
PCB layout/Gerbers: pending layout phase.
RF module datasheet and certification evidence: pending final ISP1807 certification lookup.
User manual warnings: draft below.
EMC/RF test reports: requires prototype/lab testing.

Safety Analysis

Table

Hazard	Source	Mitigation in Current Design	Open Risk
LiPo overcharge	External charging	TP5/TP6 expose only BAT/GND; charger must be off-board and appropriate for 1S LiPo	External charger selection and ASR00011 protection status must be controlled
Excess charge current	TinyCircuits ASR00011 70 mAh pouch	Document external charger target around 35 mA conservative 0.5C	Do not use an external charger above the battery's allowed current
Reverse charger polarity	TP5/TP6 pads	Label pads clearly in layout/silkscreen and verify before testing	Consider keyed fixture or protection if user-accessible
RF detuning	Battery/connector/charger pads/metal pendant near antenna	Keepout documented	Must enforce mechanically in 25 mm layout/enclosure
Pouch puncture/abrasion	Board edge/vias/enclosure	Layout requirement to avoid sharp copper/mechanical edges near pouch	Requires enclosure/mechanical review

Preliminary FMEA

Table

Subsystem	Failure Mode	Effect	Severity	Likelihood	Detection	RPN	Mitigation
External charging	Wrong charger or current	Cell heating / reduced life / safety risk	8	3	4	96	Specify 4.20 V 1S LiPo charger, conservative ~35 mA target for ASR00011
External charging	Reversed TP5/TP6 connection	Battery/board damage	8	3	3	72	Clear pad labels; use keyed pogo/fixture if possible
RF	Antenna keepout violated	Reduced BLE range / certification risk	6	5	5	150	Place module at edge and enforce no-metal keepout on all layers
Sensor	AS7343 powered from wrong rail	Permanent sensor damage	8	2	3	48	Dedicated 1V8 rail and level shifter are included
Connector	Battery connector mismatch	Wrong cable/assembly risk	6	2	3	36	J2 is exact SM02B-SRSS-TB(LF)(SN); verify polarity in layout/silkscreen

Draft User Manual Safety Warnings

Use only the specified protected 1-cell LiPo battery pouch and mating connector polarity.
Do not charge or wear the pendant if the battery pouch is swollen, punctured, hot, or damaged.
Charge only with an external 4.20 V single-cell LiPo charger suitable for the installed battery capacity and polarity.
Keep metal jewelry/enclosure features away from the BLE antenna region unless validated.

Open Items Before Manufacturing

Confirm ASR00011 protection status and production cable polarity.
Select and document the external charger/fixture for TP5=BAT+ and TP6=GND.
Verify ISP1807 module regulatory grants/integration instructions.
Review final enclosure and pendant metal hardware for RF detuning and battery safety.

Applicability
FCC/CE Technical Construction File Draft
Required Compliance Artifacts
Safety Analysis
Preliminary FMEA
Draft User Manual Safety Warnings
Open Items Before Manufacturing