Footprint Inspection

flux

The board needs both placement and routing: it has 91 airwires, 14 copper-overlap errors, and several parts extend beyond the circular outline. I’m correcting full-board placement first—preserving ENC1 exactly at the origin and the ESP32 antenna edge/keepout—then I’ll route the cleaned layout.
Thought for 9 mins 53 sec
2/4 Determine and execute required placement cleanup

Inspect current board geometry, placement, connectivity, routing, and DRC state

Determine and execute required placement cleanup

Determine and execute required PCB routing

Independently verify final placement, routing, constraints, and DRC

Accessed knowledge for the next task.
Thought for 16 sec
Created a thread
PCB Placement Cleanup
Completed
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Thought for 10 sec
Awaiting 1 background task
Received notification from "PCB Placement Cleanup" that it finished — picking the work back up.

flux

The placement executor has finished; I’m reconciling its applied result against the hard centered-encoder, antenna, edge-access, overlap, and board-bound constraints now. If placement is valid, I’ll proceed directly into USB breakout, neckdowns, and auto-routing.

flux

Placement auto-layout was applied and verified:
  • ENC1 is exactly (0.000, 0.000) mm
  • Zero component-body overlaps, out-of-board parts, keepout violations, or edge-placement violations
  • U1 antenna placement and edge connectors remain correctly constrained
Routing is blocked by pre-existing footprint defects: JP1 and U2 contain overlapping pads assigned to different nets. Auto-routing would remove those pins from their nets, so I stopped rather than corrupt connectivity. 90 airwires remain; correcting the authoritative footprints for JP1 and U2 is required before routing can continue.
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Files

Schematic

Layout

3D View

Design Notes
Final User Decisions
  • Encoder: retain Bourns PEC11R-4220F-S0024. It is the 24-detent, 24-pulse variant and is explicitly accepted, superseding the original non-detented preference.
  • RGB: remove addressable LED circuitry; use a conventional common-cathode RGB LED with independent PWM.
  • Power indicator: add a normally closed, cuttable/wickable solder-jumper power LED on 3V3.
Encoder
  • MPN: PEC11R-4220F-S0024, LCSC C143797.
  • Existing GPIO assignments and support remain: A=GPIO5, B=GPIO6, press=GPIO4.
  • External 10 kΩ pull-ups remain; A/B debounce is firmware-based. Push has a 10 kΩ/100 nF filter and wakes from deep sleep active low.
Conventional RGB LED
  • LED1: Kingbright APFA3010LSEKJ3ZGKQBC, LCSC C5278712, 3.0 × 1.5 mm right-angle 4-SMD.
  • Datasheet pinout: pin 1 red anode, pin 2 common cathode, pin 3 green anode, pin 4 blue anode.
  • Datasheet Vf at 2 mA: red 1.8 V typical/2.1 V maximum; green and blue 2.65 V typical/3.1 V maximum.
  • Common cathode connects to GND; PWM is active high.

Table

ChannelGPIOResistorLCSCTypical current
Red7510 Ω, UNI-ROYAL 0603WAF5100T5EC23193(3.3−1.8)/510 ≈ 2.9 mA
Green8220 Ω, UNI-ROYAL 0603WAF2200T5EC22962(3.3−2.65)/220 ≈ 3.0 mA
Blue15220 Ω, UNI-ROYAL 0603WAF2200T5EC22962(3.3−2.65)/220 ≈ 3.0 mA
GPIO7, GPIO8, and GPIO15 are non-strapping pins and do not conflict with flash/PSRAM on ESP32-S3-WROOM-1-N8. Firmware drives all three low before deep sleep.
Disconnectable Power Indicator
  • LED2: ROHM SML-D13FWT86C, green 0603, Vf approximately 2.1 V, LCSC C459722.
  • R22: 3.00 kΩ Ever Ohms CR0603F3K00P05Z, LCSC C881244.
  • JP1: validated Solder Jumper 2 Bridged footprint; default normally closed and excluded from BOM.
  • Path: 3V3 → JP1 → R22 → LED2 → GND.
  • Current: (3.3−2.1)/3000 ≈ 0.4 mA.
  • Disable by cutting the bridge or removing solder with wick. Layout/silkscreen must identify POWER LED DISABLE.
Power Architecture and Sourcing
  • BQ24074RGTT / C2861252 remains the power-path charger.
  • U3 is now an internally consistent TPS63001DRCR / C28060 component. Its schematic identity, manufacturer MPN, TI datasheet, and DRC VSON-10 footprint all use the DRCR ordering suffix. A project-local verified part was created because the available global DRCR library entry carried an incorrect TPS749 package field.
  • L3 FXL0530-2R2-M / C177247: 2.2 µH, 29 mΩ max DCR, >5.6 A saturation-current rating.
  • Bulk MLCCs and all other passives retain the previously assigned real LCSC MPNs.
Updated Power Budget
  • ESP32 transient allowance: 500 mA.
  • RGB full-on typical: approximately 9 mA.
  • Power LED: approximately 0.4 mA.
  • 3V3 transient design target remains 600 mA with ample status-LED margin.
Validation
  • Final schematic: 49 components and 37 named nets; JP1 is excluded from the assembly BOM, yielding 48 BOM instances.
  • Connectivity, ERC, BOM MPN, missing-footprint, passive-rating, sourcing, and schematic-legibility checks were re-run after the final changes.
  • All substantive checks are clean. Eight remaining legibility findings are cosmetic auto-generated portal-label overlaps, not electrical or connectivity defects.

  • Final User Decisions

  • Encoder

  • Conventional RGB LED

  • Disconnectable Power Indicator

  • Power Architecture and Sourcing

  • Updated Power Budget

  • Validation