Esp32-c3-led

ESP32-C6 LED Controller Board

A compact 2-layer PCB built around the ESP32-C6-WROOM-1 module, providing USB-C power/programming, on-board 3.3V regulation, ESD-protected USB data lines, a reset button, and an addressable/status LED header. All electronic parts are sourced against JLCPCB's live parts catalog for turnkey assembly.

3D Renders

Top side (regulator / passives)	Bottom side (ESP32 module / USB-C)

Schematic

Full-resolution vector version: docs/images/schematic.pdf

PCB Layout

Copper (F.Cu / B.Cu), silkscreen, and solder mask layers, board outline shown.

Board Specs

• Size: 20.55 mm × 35.55 mm
• Layers: 2 (F.Cu / B.Cu)
• MCU: ESP32-C6-WROOM-1-N8 (Wi-Fi 6, Bluetooth 5 LE, Zigbee/Thread 802.15.4, 8 MB flash)
• Power in: USB-C (5V), on-board AMS1117-3.3 LDO regulator for 3.3V rail
• USB protection: USBLC6-2SC6-FS ESD protection on D+/D-
• User I/O: Reset button (SW1), status LED (D1), 2× 3-pin headers (J1/J2) for external LED/peripheral connections
• ESD protection: ESD9B3.3ST5G on EN line

Bill of Materials

All parts verified against the live JLCPCB Open Platform API (real-time stock/pricing). Full machine-readable BOM: BOM_jlcpcb_verified.csv

Manufacturing

Board is set up for JLCPCB fabrication + assembly out of the box. production/ contains regenerated, verified fabrication files:

• esp32-c3-led_gerbers.zip — Gerbers + Excellon drill file (upload directly to JLCPCB's PCB order)
• bom.csv — JLCPCB-format BOM with a populated LCSC Part # column for every line (Comment / Designator / Footprint / LCSC Part #); each part number is a live, in-stock JLCPCB catalog match
• positions.csv — CPL / pick-and-place file (Ref, Val, Package, PosX, PosY, Rot, Side), regenerated from the current board so bottom-side parts (J1, J2, J4, U1) are correctly marked bottom

esp32-c3-led.kicad_pro / .kicad_sch / .kicad_pcb remain the authoritative KiCad 9 source files; every part also carries LCSC and MPN custom fields on its schematic symbol.

Note: an earlier BOM/CPL pair generated by the Fabrication Toolkit KiCad plugin shipped with an empty LCSC Part # column, which caused JLCPCB's auto-matcher to select wrong/out-of-stock substitutes and fail to match the connectors (J1/J2/J4) entirely. The files above were regenerated directly from the schematic's verified LCSC data and confirmed against the live JLCPCB API — use these instead of re-running the plugin unless the design changes.

Design Rule Check status

Verified clean via kicad-cli pcb drc: only 3 benign warnings remain (lib_footprint_mismatch on C1/C6/D1, confirming intentional local customizations — see below). No copper clearance errors, no dangling/floating silkscreen text, no component placement changes.

Assembly orientation / silkscreen clarity

To avoid JLCPCB assembly clarification requests, every part with a genuine orientation dependency has an unambiguous silkscreen or Gerber-encoded marker:

• D1 (LED, polarized) — cathode (pin 1) marked with a bold bar on the silkscreen outline, matching its datasheet K/A pinout.
• SW1, U2 — tactile switch and ESD IC footprints already carry a pin-1 triangle marker from their library footprints.
• J1, J2 (headers) — pin 1 uses a square pad vs. round pads on 2/3, the standard machine-readable convention (read directly from the Gerbers/CPL, not silkscreen).
• J4 (USB-C receptacle), U3 (TO-252 regulator) — mechanically keyed / self-orienting packages; cannot be placed backwards.
• D4 (ESD9B3.3ST5G) — confirmed bidirectional TVS diode per datasheet; orientation is electrically irrelevant, so intentionally left unmarked.
• U1 (ESP32-C6-WROOM-1) — uses Espressif's official reference footprint; JLCPCB sources rotation from the CPL file, not visual silkscreen inspection, for this standard module.

Repo Layout

esp32-c3-led.kicad_pro      KiCad project
esp32-c3-led.kicad_sch      Schematic
esp32-c3-led.kicad_pcb      PCB layout
BOM_jlcpcb_verified.csv     Reference BOM with LCSC part numbers (grouped by value)
docs/images/                Renders and diagrams (this README)
production/                  JLCPCB-ready fabrication output:
  esp32-c3-led_gerbers.zip     Gerbers + drill (upload as-is)
  bom.csv                      JLCPCB BOM (Comment/Designator/Footprint/LCSC Part #)
  positions.csv                CPL / pick-and-place file
  gerbers/                     Individual Gerber/drill layer files