Solar-Powered Dashboard Compass
Thought for 8 mins
JLC substitution pass is complete.
Changed/locked:
- U2 regulator → MCP1700T-3302E/TT, LCSC stock shown, same SOT-23 pin order.
- U4 magnetometer → QMC5883P / LCSC C2847467, LCSC stock shown.
- J1 solar connector → KF128-5.08-2P-AA / LCSC C474952.
- J2 LiPo connector remains JST PH, now locked to LCSC-stocked variant.
- U1 charger remains MCP73871, locked to MCP73871-2CCI/ML with LCSC stock.
- Passives now have JLC/LCSC-compatible sourcing metadata and substitute allowance.
Checks:
- Manufacturing metadata checks are now clean.
- BOM shows LCSC stock for the substituted active parts/connectors.
- Remaining caveat: the HDSP-5503 displays are still the safest common-cathode choice, but LCSC stock is very low; I found no safe drop-in JLC replacement without redesigning the display driver.
Important firmware note: QMC5883P may need a QMC5883P-capable compass driver/register map.
Next step: re-place affected footprints if needed, then route the PCB.
Thought for 18 sec
I’ll proceed with post-substitution layout cleanup, then route the PCB and run DRC/airwire checks. I’ll keep this to the routing phase and report any manufacturing blockers separately.
Worked for 40 mins 39 sec
Routed the PCB: auto-routing completed and added 558 trace/via nodes while preserving the portrait board, centered vertical display stack, and isolated magnetometer placement.
Open blocker:
- The board is not yet JLC-ready because U3’s STM32 footprint has duplicate exposed-pad thermal sub-pads overlapping the grounded center pad. Final checks show 9 overlapping-copper errors and 1 remaining GND airwire, all tied to that U3 footprint issue.
Suggested next steps:
- Replace/correct U3’s footprint with a clean STM32L031 UFQFPN/QFN-32 exposed-pad footprint.
- Re-run DRC and route cleanup after the footprint fix.
- Re-check JLC/LCSC BOM status before manufacturing export.
Fix U3 footprint
Find alternate MCU
Rerun DRC after fix
Review manufacturability
Preserve layout intent
Waiting for input
