aa error step by step clear karo 16 capacitor MPN findings, 10 IMU/USB ERC errors અને છેલ્લી routing તપાસના 67 airwires બાકી છે. આગળ capacitorsની evidence-based qualification અને routing blockerનો સુધારો જરૂરી છે;
હું ક્રમ પ્રમાણે પહેલાં 16 capacitors qualify કરીશ, પછી IMU/USB ERCનાં સાચાં કારણ તપાસીશ, અને છેલ્લે routing blocker પર કામ કરીશ. દરેક તબક્કાનો સુધારો save કરીને fresh count ચકાસીશ; errors છુપાવીશ નહીં.
Thought for 8 mins 31 sec
2 days ago
Thought for 6 sec
1/3 Qualify remaining capacitor MPNs against value, package and electrical requirements
Qualify remaining capacitor MPNs against value, package and electrical requirements
Resolve or document actual IMU/USB ERC causes without suppressing checks
Repair evidenced routing blockers and verify fresh airwire/DRC counts
Thought for 9 sec
Thought for 6 sec
Awaiting 1 task
"Schematic ERC and Component Qualification" completed.
Step-by-step કામ ગોઠવીને પહેલા બાકી 16 capacitorsની qualification શરૂ કરી, પરંતુ તેનું અંતિમ પરિણામ વાંચીને verify કરી શક્યો નથી—તેથી આ sessionમાં capacitor errors ઘટ્યા કે નવા MPNs save થયા હોવાનો દાવો નથી.
છેલ્લી verified સ્થિતિ: 16 capacitor MPN findings, 10 IMU/USB ERC errors અને 67 airwires બાકી છે; અગાઉ qualify કરેલા 36 resistors અને saved routing યથાવત્ છે. આગળ capacitor qualificationનું પરિણામ તપાસવું, પછી ERCનાં સાચાં કારણ સુધારવાં અને routing blockers ઉકેલવા જરૂરી છે; board હજી flight-ready નથી.
Completed: fresh ERC/BOM inspection, qualification of all 36 resistors, read-only schematic verification and fresh post-edit checks.
Failed/blocked: clearing the ten ERC errors; no missing physical schematic connection was evidenced. The remaining issues require source-model investigation rather than invented sources or NC markers.
Unattempted: final capacitor qualification mutations (bounded batch stopped at resistor completion); PCB changes and physical flight tests outside scope.
Check evidence
Before: reviewedAt 2026-10-11T05:46:35.792Z, Electrical Rule Checks 10 Errors / 0 Warnings; missing MPN 52 Errors.
After: reviewedAt 2026-10-11T05:51:21.350Z, Electrical Rule Checks 10 Errors / 0 Warnings; missing MPN 16 Errors. No claim of overall clearance. Commits 6a36a62c and 9a9e6482 changed only Manufacturer Part Number and Manufacturer Name. No package/value/topology/layout changes, exclusions, flags or NC edits.
Saved resistor selections
All manufacturer Yageo, existing 0603 metric1608 footprints, 1% tolerance and 0.1W rating preserved. Fresh full schematic read verified each of the 36 assignments (summary BOM grouping collapses generic variants and must not be used as an exact purchasing list).
Table
MPN
Value
Designators
RC0603FR-071KL
1kΩ
R15–R25, R32, R33
RC0603FR-0710KL
10kΩ
R1–R4, R29–R31, R34, R36
RC0603FR-07100KL
100kΩ
R11–R14, R28, R35
RC0603FR-07100RL
100Ω
R7–R10
RC0603FR-075K1L
5.1kΩ
R5, R6
RC0603FR-074K7L
4.7kΩ
R26, R27
Each exact MPN appeared in library search; shared manufacturer RC series evidence verifies standard RC0603 0.1W, maximum working voltage75V and -55 to155°C operating range. Rated power is at70°C and derates above this temperature. F denotes1% tolerance. RC0603 body length1.60±0.10mm and width0.80±0.10mm match existing nominal1608 envelopes.
Circuit screening, calculated rather than manufacturer claims: a full3.3V across1k gives10.89mW; across10k gives1.089mW;5V across5.1k gives4.90mW. R28 at bounded30V input with100k/10k divider sees27.27V and7.44mW, below existing50V requirement and actual75V working limit. Transient envelope remains to test. DShot100Ω resistors are appropriate for normal signal use, not a guaranteed continuous hard-short rating: ideal3.3V short would dissipate108.9mW, above nominal100mW. Respect GPIO current limits and confirm cable behavior. These sourcing edits do not constitute environmental or flight qualification.
Exact remaining ERC blockers
U2:VDD(pin8), U2:VDDIO(pin5), net3V3_IMU: fresh schematic shows both on the same net as U5:VOUT(pin5), C12–C14 and C19. U5:VIN and EN both on CORE_5V; U5:GND on GND. Datasheet confirms U5 pin5 is output voltage. Therefore these are not evidenced missing wires; suspected library power-output/driver-recognition defect. Current schematic inspection does not expose terminal Pin Type, so precise root cause remains unverified. Native board property mutation has no documented pin-scoped type editing operation; do not set component-level Pin Type to hide it. Investigate AP2112 source terminal5 and ERC source propagation with source-project authorization.
J1:GND(A1_B12), GND__1(B1_A12), SHELL_GND(SH1), SHELL_GND__1(SH2), SHELL_GND__2(SH3), SHELL_GND__3(SH4): all connected GND; ERC labels them Power Input and demands an output. Connector contact/source modeling requires review, not another wire or arbitrary ground source.
J1:VBUS(A4_B9), VBUS__1(B4_A9): both on USB_VBUS, intentionally host-fed detection-only rather than CORE_5V. External host is not an on-board driver. Preserve external-regulated5V policy. Manufacturer specification confirms VBUS A4/A9/B4/B9 and GND A1/A12/B1/B12. Shell identifiers and explicit passive pin classification were not established by retrieved USB series specification; do not claim verified pin-type repair.
Remaining missing MPN items
C1–C4, C7–C15, C20–C22 (16 total): all0603; twelve100nF, C11=1uF, C13=2.2uF, C14=10nF, C7=4.7uF, existing16V10%.
100nF candidate CC0603KRX7R9BB104 appeared in library as100nF50V10% X7R0603. Datasheet lookup verified size, tolerance, voltage and temperature, but its returned exact104 capacitance assertion failed support validation; no capacitor MPNs were assigned from incomplete evidence. Next bounded batch should resolve exact value evidence and effective-capacitance needs before saving. Other capacitor values were not researched in this pass.
C5/C6 VCAP and C16–C19 existing Murata selections preserved, including prior prototype-only bias/ESR qualification limitations documented in mlcc-qualification-review; not promoted to guaranteed qualification here.
Capacitor continuation — 2026-10-11
This section supersedes the prior capacitor-batch status, not the historical resistor/ERC results. Completed: sourcing selection and saved real MPN/manufacturer for C1–C4, C8–C10, C12, C14, C15, C20–C22 (13). Failed/blocked: final qualification of C7, C11, C13 (3), due to missing applicable effective-capacitance evidence and/or dielectric mismatch. Unattempted: ERC repair and all PCB modifications, deliberately outside continuation scope.
Fresh initial missing-MPN count16 at2026-10-11T06:05:01.104Z; fresh final count3 at2026-10-11T06:10:28.781Z. Saved commit44ddd7f0 changes MPN/manufacturer only. Fresh full BOM confirms twelve CC0603KRX7R9BB104 instances, one CC0603KRX7R9BB103 instance, three unassigned capacitors and the six preserved existing Murata assignments. Existing nominal values,16V design-minimum voltage metadata,10% tolerance,0603 footprints and all nets remain unchanged. No exclusions or check suppression.
Manufacturer coding rule is two significant digits followed by number of zeros, in pF. Derived explicitly:104=10×10^4pF=100000pF=100nF. This resolves the earlier code-104 unsupported direct assertion without guessing. Code9=50V and K=10%. X7R temperature characteristic is±15% over-55 to125°C. 0603 nominal1608 bodies are1.6±0.1 by0.8±0.1mm, matching the existing parametric0603 footprint family. For103, manufacturer evidence explicitly verifies10nF,50V and10%. Its0603 code maps to1608. X7R operating range-55 to125°C verified.
Voltage screen: actual circuit is3V3/3V3_IMU, NRST or divided ADC-to-GND, never rawVBAT. Even3.6V upper screening voltage uses7.2% of selected50V rating, with46.4V margin; this is a voltage-rating calculation, NOT proof of effective capacitance. The16V property retained is the design minimum rather than selected-part maximum; purchase by exact MPN.
STM32 manufacturer recommends ceramic100nF per VDD supply pair plus one4.7uF, and100nF+1uF at VDDA. IMU manufacturer specifies X7R100nF10%,2.2uF10% VDD bypass and X7R10nF10% VDDIO bypass. Saved small bypass choices meet these stated nominal/dielectric requirements. They are not regulator-stability/VCAP parts. Quantitative part-specific bias/aging effective capacitance for saved Yageo parts remains unverified: supplied data contains temperature curves rather than DC-bias curves. ADC filter corner and settling must be checked with actual capacitance; no exact time constant or guaranteed worst-case bypass impedance is claimed. These are sourcing-qualified standard bypass selections, not full environmental/flight qualification.
Specific remaining blockers and next action
C11=1uF analog bypass: library/manufacturer candidate Würth885012206076 verifies1uF10%,25V X7R and1608 dimensions. Operating range-55 to125°C. Numeric effective capacitance at3.3V is unresolved; retrieved datasheet warns actual voltage changes capacitance. No candidate assigned. Next: retrieve component-specific REDEXPERT bias/AC/temperature/aging data or another manufacturer's characterized1uF0603 part.
C13=2.2uF IMU bypass: found Aillen0603W225K160XD is2.2uF16V10%1608, but X5R-55 to85°C, not IMU-required X7R; reject. YageoCC0603KRX7R6BB225 search alternative is only10V, below existing16V minimum, so not assigned. Web found MurataGRM188Z71C225KE43D as a potential16V10%X7R0603 candidate, not yet manufacturer-datasheet/bias-qualified. Next: exact library lookup and manufacturer SimSurfing characteristic data for that candidate; preserve2.2uF and0603.
C7=4.7uF MCU bulk: MurataGRM188R6YA475KE15D library says25V whereas manufacturer catalog query yielded35V and X5R; no assignment from conflicting metadata. Better candidate GRM188Z71C475KE21D appeared in library and manufacturer specification verifies4.7uF10%,16V X7R-55 to125°C. Body1608 dimensions match existing0603 family. The±15% limit with50%rated voltage is a TEMPERATURE-characteristic statement, not a DC-loss bound. Numeric effective4.7uF bulk at3.3V remains unverified; no assignment. Next: retrieve exact manufacturer's DC-bias curve plus aging and AC test conditions, assess against STM32 bulk intent. If effective-capacitance target cannot be met with4.7uF0603, escalate value/package trade-off rather than silently change layout or nominal value.
Existing C5/C6 VCAP and C16–C19 regulator selections and their earlier qualification caveats preserved. No new claim that all capacitors, ERC or the board are complete.