FC na badha 80 components 39 × 39mm board par double-sided place karya chhe; placement check ma body/copper overlaps ane out-of-bounds findings nathi. Results Prototype Placement Results ma save chhe.
Haju baki:
Last verified state ma 153 airwires chhe; full routing sharu nathi thayu.
12 header/keepout findings ane stackup inconsistency nu reconciliation complete thayanu verify kari shakyo nathi.
Proceed to prototype placement from the schematic electrical standpoint; not manufacturing or flight release. Recovered saved review is electrical-completion-review, whose leading VCAP disposition supersedes its historical blocked paragraphs. No concrete schematic disconnect, incorrect supply path or new electrical blocker was established in the examined scope, so no speculative rewiring, dummy drivers, ERC suppression or PCB geometry edits were made.
Completed evidence reconciliation
Current BOM: 80 instances, 14 library part types; 22 generic capacitor instances and 36 generic resistor instances. Targeted detailed schematic read verifies C5/C6 Murata GRM21BR71C225KA12L, 2.2uF, 16V, 10%, 0805, substitutes No; isolated VCAP1 = U1:VCAP_1 + C5:P1, VCAP2 = U1:VCAP_2 + C6:P1, with both P2 pins GND. C16/C18 readback and C17/C19 detailed readback confirm GRM21BR71C475KE51L, 4.7uF, 16V, 10%, 0805.
mlcc-qualification-review records a manually inspected manufacturer-authored characteristic PDF and durable PDF/curve assets. This closes documentary prototype selection, not guaranteed combined-condition production qualification. This batch did not re-download or independently measure those curves. Remaining 16 capacitor instances have no concrete MPN qualification claim.
firmware-build-results records delivered custom Betaflight source/BIN/ELF/MAP, pinned source revisions, checksums, successful ARM builds, 8MHz bypass and PC0 active-low USB integration, and hard NULL motor backend. These are saved compile/host-test evidence, not fresh independent rebuild or hardware evidence in this batch. Historical safe-only paragraphs are superseded by the leading custom release. Motors remain bench-locked off; no stock/proprietary-app compatibility claim.
Actual detailed net read confirms J7:1 -> F2 -> D8 Anode/Cathode -> CORE_5V; U4/U5 VIN and EN share CORE_5V. USB_VBUS contains J1 VBUS contacts, D2 VBUS and R34 only, with no core-power connection. R34 -> Q1 gate/R35 pulldown; Q1 source GND, drain PC0 with R36 to 3V3. No interface resource mapping changed.
Fresh ERC — 07:23:44.402Z
10 Errors, 0 Warnings, retained visibly with original tool severity; no waiver.
Table
Individual finding
Connectivity evidence and classification
Next action
U2:VDD missing power
Same 3V3_IMU net as U5:VOUT pin5, C19 and local decoupling; supply detection limitation, not disconnected input
Verify actual powered rail during bring-up; do not add fictitious driver
U2:VDDIO missing power
Same regulated output net as above
Same
J1:VBUS undriven
USB_VBUS externally supplied by host, feeds detector/USB protection only
Measure host/power combinations; never tie to CORE_5V merely to clear ERC
J1:VBUS__1 undriven
Same host-source net
Same
J1:GND undriven
Shared GND includes J7 external-source ground, both LDOs and MCU
Verify assembly continuity and return routing
J1:GND__1 undriven
Same common GND
Same
J1:SHELL_GND undriven
Same common GND
Same
J1:SHELL_GND__1 undriven
Same common GND
Same
J1:SHELL_GND__2 undriven
Same common GND
Same
J1:SHELL_GND__3 undriven
Same common GND
Same
No additional Error/Warning categories returned in the electrical-category query. Ground is a reference/return, not a fabricated power-output driver.
Layout handoff — separate real blockers
Read-only fresh selected DRC: 218 airwire Errors at 07:26:06.017Z; 1 overlapping-copper Error at 07:25:54.920Z. Overlap identifies D8 Cathode (CORE_5V) against J7 pin2 (GND), using component/pin UIDs correlated with the inspected netlist. This is a real reported cross-net copper short, not an ERC inference warning; layout owner must separate these pads/copper and rerun DRC before fabrication. No missing-footprint or invalid-pad Error/Warning returned in the requested checks. These selected checks do not constitute a full placement/clearance/routing audit.
Assigned-scope status and exact remaining gates
COMPLETED: recover saved review; reconcile capacitor/firmware evidence with current key connectivity/BOM; fresh ERC classification; electrical prototype-placement decision; durable report.
COMPLETED assessment of concrete schematic fixes: none warranted by established evidence; zero schematic mutations avoids inventing a clean count. Documentation reconciliation is the only mutation.
UNATTEMPTED/outside assigned scope: fix D8/J7 copper overlap, complete 218 routes and full PCB verification; no geometry edits authorized in this batch. Move/separate the affected components/copper under layout authority and rerun overlapping-copper checks.
UNATTEMPTED: physical rail/VCAP/LDO startup, load-step and thermal tests; USB attachment/enumeration/backfeed/ESD; sensor identity/orientation, ADC calibration, powered-off injection, receiver/failsafe, motor/DMA waveform qualification. Hardware availability blocks measured validation, not initial placement.
FAILED to establish production/flight readiness: guaranteed capacitor envelope/procurement, physical testing, routing and the reported copper short remain unresolved. External regulated 4.75–5.25V-only supply and powered 3.3V interface/sensing restrictions remain binding. Never connect raw battery to the FC power input, never debugger-power an LDO output, and do not apply external signals/sensing with FC unpowered.
This assigned review batch is complete; overall PCB/product completion is not claimed.