Footprint Inspection

Worked for 1 min 4 sec

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

View Thread

Thought for 10 sec

Awaiting 1 background task

Received notification from "PCB Placement Cleanup" that it finished — picking the work back up.

Thought for 13 sec

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.

Worked for 1 min 40 sec

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.

Files

Schematic

Layout

3D View

Project Specification

Project Overview

Status: Schematic implemented and reviewed
Compact battery-powered ESP32-S3 rotary UI controller with native USB-HID, BLE/Wi-Fi, USB-C charging/power path, a user-approved pressable 24-detent encoder, conventional PWM RGB feedback, and a disconnectable power indicator.

Intended Use

Compact prototype control knob for media, smart-home, and machine-parameter applications.
Operates over native USB-HID or wirelessly; supports USB-only flashing.

Main Features

ESP32-S3-WROOM-1-N8 integrated-antenna module.
USB-C USB 2.0 sink/device with USBLC6-2SC6 ESD and independent 5.1 kΩ CC pull-downs.
BQ24074 power-path charger, USB500 mode, ~300 mA charge current, battery-absent operation.
TPS63001 fixed 3.3 V buck-boost with FXL0530-2R2-M power inductor.
Bourns PEC11R-4220F-S0024 24-detent/24-pulse encoder with push switch; the detented behavior is explicitly accepted and supersedes the original non-detented preference.
Kingbright APFA3010LSEKJ3ZGKQBC common-cathode RGB LED with independent active-high PWM channels.
ROHM SML-D13FWT86C green 3V3 power LED with normally closed JP1 disable solder bridge.

System Architecture

Diagram

Hardware Subsystems

Compute/RF: ESP32-S3-WROOM-1-N8, 8 MB flash, integrated antenna.
Power: BQ24074 charger/power path and TPS63001 3.3 V buck-boost.
Input: PEC11R-4220F-S0024; A/B firmware debounce and 1 ms RC on active-low push.
RGB status: APFA3010LSEKJ3ZGKQBC common cathode. Red GPIO7 through 510 Ω; green GPIO8 through 220 Ω; blue GPIO15 through 220 Ω. Active-high PWM.
Power status: 3V3 → normally closed JP1 → 3 kΩ → SML-D13FWT86C → GND, approximately 0.4 mA. JP1 is opened by cutting or solder wicking.

Interfaces and GPIO Map

Table

Function	GPIO	Notes
Encoder press	4	RTC-capable active-low wake
Encoder A	5	Input
Encoder B	6	Input
RGB red	7	Active-high PWM
RGB green	8	Active-high PWM
RGB blue	15	Active-high PWM
Charger CHG_N	9	Active-low input
PGOOD_N	10	Active-low input
USB D−	19	Native USB
USB D+	20	Native USB
BOOT	0	Strap/button only

GPIO7/8/15 are non-strapping GPIOs and are not reserved for flash/PSRAM on the N8 module variant.

Power Budget

Table

Load	Design peak
ESP32-S3 radio transient	500 mA at 3.3 V
PWM RGB LED	~9 mA typical with all channels on
Power LED	~0.4 mA while JP1 is closed
3.3 V rail target	600 mA transient minimum

At 3.0 V battery and 90% efficiency, a 600 mA load at 3.3 V reflects to about 0.733 A battery current. The status LEDs do not materially change regulator sizing.

Manufacturing and Assembly

JLCPCB prototype assembly; four-layer JLC7628 is the later layout target.
All BOM components have MPNs and footprints. JP1 is a validated default-bridged two-pad solder-jumper footprint and is intentionally excluded from the assembly BOM.
Power-indicator silkscreen/layout should identify JP1 as POWER LED DISABLE — CUT/OPEN.

Firmware Requirements

PWM outputs are active high because LED1 is common cathode.
Drive GPIO7, GPIO8, and GPIO15 low before deep sleep to turn RGB off.
Encoder A/B debounce is in firmware; push remains active-low wake on GPIO4.

Important Design Decisions

Existing PEC11R-4220F-S0024 detented encoder retained by explicit user approval.
Addressable RGB circuitry removed in favor of direct, low-current three-channel PWM.
Power LED current is minimized and can be physically disconnected with JP1.

Assumptions

Protected LiPo cutoff is near 3.0 V.
No USB-PD or Type-C current-advertisement detection.
Formal compliance qualification is outside prototype scope.

Change Notes

Final encoder/RGB/power-indicator correction implemented.
Final schematic contains 49 components and 37 nets; JP1 is excluded from the assembly BOM, yielding 48 BOM instances.
ERC, BOM, MPN, footprint, passive, and sourcing checks re-run after changes.
Eight residual schematic warnings are cosmetic auto-generated portal-label overlaps only.

Project Overview
Intended Use
Main Features
System Architecture
Hardware Subsystems
Interfaces and GPIO Map
Power Budget
Manufacturing and Assembly
Firmware Requirements
Important Design Decisions
Assumptions
Change Notes