Project Getting Started

Worked for 1 min 37 sec

I reviewed the completed research handoffs and checked the live schematic and PCB. This revision is still incomplete and remains on release hold—not an approved battery-powered design.

Completed

Preserved the pre-change backup.
Recorded your CNHL 3S battery requirements and researched battery monitoring, default-off protection, auxiliary supplies and a purchased motor converter.
Documented integration gaps and saved the verified continuation state in the revision handoff.

What remains unresolved

Motor power: no battery-protection or high-current motor-power circuit was added. The proposed TRACO converter is not selected or approved: exact-model capability and low-input thermal derating remain unconfirmed. FET/shunt sizing, fuse coordination, current limits, regeneration handling, harness losses and transient/thermal validation are unfinished. The 25–30 A option remains provisional capacity—not continuous demand—and D24V150F5 remains unsuitable for unrestricted 25–30 A service.
Face: still disabled. U4’s head-side supply remains unsourced, and EN remains pulled low.
C7/C8/C13: still generic capacitors without exact qualified MPNs; effective-capacitance/ESR qualification is unfinished.
Integration: firmware compatibility, audio tests, exact harness drawings and mechanical fit remain incomplete. The PCB is still the unapproved 160 × 100 mm placeholder.
Checks: the eight ERC categories returned by my inspection passed, but this was not a complete final sign-off. DRC still reports unrouted connections. No manufacturing files were released.

What I still need from you

Original/restored torso and head CAD, including mounting locations and cable-clearance requirements.
Photos of the received battery label and balance connector; installed harness lengths and cooling conditions.
Where not already supplied: exact head/display and Jetson-carrier revisions, plus the target firmware repository and commit. Joint duty/torque requirements are also needed if reduced-current operation is acceptable.

You do not need to resend the motor model or battery product identity. Execution stopped because your account ran out of ACUs.

Waiting for input

Files

Schematic

Layout

3D View

Review Package

Motor-budget assessment supersession — 2026-10-22

Analysis/records batch completed; overall release remains HOLD. @power-budget~c0 now contains the authoritative quantitative motor options, source discrepancy ledger, margin/status table, conductor/contact-drop examples, total-battery formula and validation gates; earlier descriptions of it as only an open motor worksheet are superseded (other rails remain unvalidated).30A/150W is a provisional capacity envelope, not continuous demand or final hardware. D24V150F5 FAILS unrestricted25–30A service; TDK i7A12060A008V is input-dependent and UNVERIFIED for final use.15A option requires tested current-limit enforcement and accepted torque loss. No hardware/layout/manufacturing changes or physical tests; actual power stage, pack/harness/thermal/transient evidence still absent. Safety record slug is preliminary-fmea~zu.

Final disposition

PARTIAL ENGINEERING CAPTURE — not a complete Rev8 controller,not battery-ready,not fabrication approved. After U2D2 migration:72 native components,44 populated electrical nets,61 net records including17 empty historical identifiers. Exactly one custom torso PCB retained. Purchased U2D2/head/devices are system items,not extra custom boards. U2D2 Migration is the current motor-architecture/delta authority;prechange backup was saved before edits.

Independent electrical migration review found no migration-induced connectivity error. Fresh lead reads at2026-10-19T16:20–16:21 show ERC0 errors/0 warnings,206 airwire errors,MPN3 errors(C7/C8/C13),50 outside-board warnings and one inherited J1/J3 overlap. Missing footprints,invalid layers,overlapping copper,redundant traces and keepout checks passed. This is NOT clean DRC or safety approval. Existence of a footprint does not certify geometry/acoustics.

Project files index

Project Specification — owner requirements and release gates.
Circuit Capture Plan — capture boundary and block plan.
Power Budget — authoritative quantitative motor assessment with provisional options/status ledger and test gates; other rails still open, no final sizing approval.
Firmware Interface Specification — exact proposed UART virtual register map, units/time/quaternion and face protocol reference; not implemented.
Bill of Materials Review — sourced selections, unresolved critical capacitors and documentation variants.
System Block Diagram — architecture and captured/deferred boundaries.
Board Bring-Up Plan — conditional sequence; not power-on authorization.
Safety FMEA — preliminary hazard priorities and motor release hold.
Regulatory FCC CE, RF Integration Evidence, User Manual Outline, Declaration of Conformity Draft — draft records only, no compliance claim.

Durable detailed evidence

Complete owner Rev8 brief.
Initial67-part capture handoff — historical pin tables, assembly variants and test gaps.
Bought modules and head harness review — family-header GPIO proposals, display/ToF harnesses, bought BOM, face protocol, load evidence and CAD gaps. Historical torso snapshot is superseded by later corrections.
Passive sourcing and audio-domain correction.
Receiver bias correction: exact nets and power-state matrix.
Final receiver-bias verification/addendum.

What is actually captured

Dedicated STM32F411RET6 with supply/reset/boot/VCAP support,SWD,local LSM6DSV16X SPI/interrupts and independent host UART. Former motor UART pins are NC;MCU is not a DXL slave.
Jetson USB -> purchased U2D2 -> externally documented GND/DATA-only harness;PCB J6/TP5 are passive diagnostics only. Exclusive TX/RX/OE/shunt circuit removed. Required separate protected motor supply/disconnect was absent before and remains unimplemented.
MAX98357A BTL output, manual default-off arm and optional torso DMM microphone capture path. Domain buffers and defined I2S idle states corrected.
Host UART retains source-side Ioff barriers,destination buffers and own-domain/raw-GPIO bias;U8/U9/U17/U18,R13–R22,C29/C30 remain. R23 belonged to the removed motor receiver and is deleted;R10 retention rule is unchanged.
Face connector and disabled isolation placeholder only. No working face link claimed.

Independent-review findings and resolution

Table

Finding	Result
Off-domain UART/I2S inputs could float	Corrected with U17/U18 and R13–R22; focused independent verification passed static topology. Ramp/leakage/SI tests still required
Mic SD receiver bias	R10 retained whenever U13 populated; existing metadata corrected
Former TTL receive/idle	Motor RX driver and R23 removed;TTL_DATA is passive J6/TP5 only. External U2D2/motor powered-off leakage and actual bus behavior remain unvalidated
Host200Hz/full-snapshot bandwidth conflict	ABI clarified: internal200Hz snapshots,20Hz default/50Hz maximum wire publication at1152008N1;84-byte payload and≤94-byte framed packet. Remaining misleading labels corrected
Face isolation incomplete	U4 VCCB unsourced, EN low; four-wire harness lacks actual head3V3 reference. Intentionally disabled, not solved
Critical capacitor sourcing	C7/C8/C13 remain without MPN after bounded attempts; exact effective capacitance/ESR evidence not established. No fictitious assignments
Battery/motor safety absent	Deferred at named bench boundaries; independent review forbids battery/motor use

Requirement completion ledger and specific blockers

Table

Deliverable	State	What specifically remains
Single custom torso architecture	Recorded and captured in part	No custom head/IMU PCB added
Full reviewable schematic	PARTIAL logical capture only	High-current circuitry absent; face disabled; visual drafting not performed and requires separate approval
Power budget/protection	Motor quantitative assessment completed; final hardware approval BLOCKED	30A provisional envelope and options calculated in Power Budget; actual battery,current-vs-time,regen,other rail loads,harness and hot-system evidence absent; no final fuse/FET/shunt/TVS/regulator values
Fail-safe motor power	Not implemented	Independent normally-off high-side disconnect,latch/rearm,hardware watchdog/stop,brownout,per-cell monitor and retained motor-side energy absorption
Interface/pinout tables	Review tables supplied	Actual carrier/JetPack,head revision,power endpoints and cable orientation/continuity
Harness/mount drawings	Logical schedules only	Mating-face and wire-entry datums,contact/wire ratings,strain relief; robot CAD and purchased-revision fit missing
Footprint-checked complete BOM	Incomplete	C7/C8/C13 qualification,all exact geometry audits and microphone acoustic/drill/paste verification; current stock/Basic classification not fully verified
Two microphone variants	Documented, not generated manufacturing variants	USB_ONLY omit mic components; retainR10 ifU13 remains; populated backup not recorded/tested
Firmware dependencies and exact host map	Design proposal delivered	No firmware source/binary build,flash,resource/fusion timing or fault tests
Jetson USB/I2S audio	No tested configuration	Installed release,pinmux/device-tree/ASoC,ALSA formats,recording and simultaneous playback under fan/servo load
Head/display/ToF	Bought BOM,GPIO/harness/firmware proposals	Exact power/header/cable endpoints,regulator capacity,controller timing,drivers,ToF recovery and real-cable SI tests
Mechanical fit	Gap review only	No actual torso/head CAD; converter location,cooling,USB/CSI access,mounts,two inserts,neck swept volume and optics/acoustics unresolved
Four-layer layout proposal	Recorded only	Default160x100mm board is NOT approved torso envelope; no placement/routing/thermal geometry
ERC/DRC	ERC passes checked rules;DRC not clean	206 airwires,3 MPN errors,50 bounds warnings,J1/J3 overlap;physical geometry not approved
Simulation/physical verification	Not performed	No validated simulation fixture/models established; no target hardware or physical test evidence supplied. No dynamic/thermal/audio proof
One manufacturing set	WITHHELD intentionally	Safety,audio,harness and fit gates remain open; no Gerbers/PnP released

Future power/safety topology

Protected3S distribution with independent computer DC-jack,servo and auxiliary branches, common ground. No Jetson5V-header backfeed. Separate supervisory supply from shed-able head/audio. Motor disconnect must default off independently of Linux, include fault latch/deliberate rearm and preserve motor-side regeneration absorption after opening. Coordinate branch protection and reverse-current/overvoltage behavior. Per-cell open-wire/fault handling and early motor shedding/shutdown need pack data; critical faults override graceful shutdown. No guarantee survives battery removal without verified hold-up. Torque removal may collapse robot, so mechanical restraint is mandatory.

Four-layer and mechanical direction

Proposal:L1 components/signals/power,L2 continuous ground,L3 reviewed power/local signals,L4 signals/ground. Final copper/dielectric/current/EMI rules remain open. Keep high-current returns away from sensitive reference loops; do not switch motor ground. Historic split-board outlines and bare-WROOM geometry are not fabrication evidence. Official Waveshare CAD is FAMILY CAD, not independently verified purchased-revision geometry.

Next actions and needed inputs

Owner supplies battery label/capacity/C-rating/protection/balance connector,motor load profiles and target carrier/JetPack revisions;15 XL330-M288-T are now selected. These unblock only dependent power/interface items.
Supply current robot CAD and purchased devboard/screen photos/revisions; validate actual header,power,cable datums and converter fit.
Qualify critical capacitors/footprints and complete face isolation; then close low-power capture review before optional visual drafting.
Implement firmware and actual JetPack audio/tests; finalize numeric bench limits. Only after those gates should layout and manufacturing be considered.

U2D2 migration removed16 exclusive parts,restored/pinned all72 surviving baseline PCB poses and preserved outline/stackup. No routing/overall placement redesign or manufacturing order was made. Six affected NC wire stubs/detached residue were cleaned;17 empty net identifiers remain inert. Earlier88-part drafting estimates are historical,not a current quote. Purchased-module mounting/native library representation,actual protected power and motor-off DATA safety remain individually open.

Motor-budget assessment supersession — 2026-10-22
Final disposition
Project files index
Durable detailed evidence
What is actually captured
Independent-review findings and resolution
Requirement completion ledger and specific blockers
Future power/safety topology
Four-layer and mechanical direction
Next actions and needed inputs