KiCad-ESP32-S3-Custom-DevBoard

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⚡ ESP32-S3 Custom Development Board

A production-grade, 4-layer PCB development board built around the ESP32-S3-WROOM-1 module.
Designed for signal integrity, RF performance, and professional-grade hardware standards.

📋 Table of Contents

Overview
Key Features
Technical Specifications
Advanced Hardware Design
PCB Layer Stackup
Pinout & Peripherals
Repository Structure
Manufacturing

🔍 Overview

This project is an advanced, production-ready development board based on the ESP32-S3-WROOM-1 module. It was designed with a focus on:

✅ Signal Integrity — Controlled impedance traces, optimized return paths
✅ Power Stability — Low-noise LDO regulation with proper decoupling
✅ RF Performance — Dedicated keep-out zone under the module antenna
✅ — 4-layer stackup, differential pair routing

Comments

Feature	Detail
🧠 MCU	ESP32-S3-WROOM-1 — Dual-core Xtensa LX7, Wi-Fi 4 & BLE 5.0
⚡ USB	Native USB-C for programming and power
🔋 Power	5V input → 3.3V via AMS1117-3.3 LDO
📡 RF	Keep-out zone for optimized antenna performance
📐 PCB	4-layer stackup for reduced EMI
🔌 Headers	UART, I2C, SPI — fully broken out
📊 ADC	2× dedicated analog input channels
🔴 LEDs	Power LED (D1) + User-programmable LED (D2)
🔘 Buttons	RESET (EN) + BOOT (GPIO0)
🧪 Test Points	5V, 3.3V, GND, TX, RX (TP1–TP5)

Parameter	Value
Microcontroller	ESP32-S3-WROOM-1
CPU	Dual-core Xtensa LX7 @ up to 240 MHz
Wireless	Wi-Fi 802.11 b/g/n (2.4 GHz) + BLE 5.0
Flash	Built-in (varies by module variant)
Input Voltage	5V DC via USB-C
Operating Voltage	3.3V (regulated via AMS1117-3.3)
PCB Layers	4 (Signal / GND / Power / Signal)
PCB Tool	KiCad 9.0
USB Interface	Native USB (D+/D- differential pair)
Programming	USB-C (native), UART via test points

Layer	Type	Description
Layer 1 (Top)	Signal	Components, USB, buttons, LEDs
Layer 2	GND Plane	Solid ground pour — EMI shield & return path
Layer 3	Power Plane	Solid 3.3V pour — stable power delivery
Layer 4 (Bottom)	Signal	Additional routing

Header	Signals
UART	TX, RX, GND, 3.3V
I2C	SDA, SCL, GND, 3.3V
SPI	MOSI, MISO, SCK, CS, GND, 3.3V
ADC	ADC_CH1, ADC_CH2, GND
GPIO	Spare GPIO pins for custom expansion
Test Points	TP1 = 5V · TP2 = 3.3V · TP3 = GND · TP4 = TX · TP5 = RX

Folder / File	Description
`Hardware/`	KiCad 9.0 project files (`.kicad_pcb`, `.kicad_sch`, `.kicad_pro`)
`Manufacturing/`	Production-ready Gerber, Drill, and POS files
`Images/`	High-quality 3D renders
`.gitignore`	Git ignore rules
`LICENSE`	MIT License
`README.md`	This file

KiCad-ESP32-S3-Custom-DevBoard

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⚡ ESP32-S3 Custom Development Board

📋 Table of Contents

🔍 Overview

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⚡ ESP32-S3 Custom Development Board

📋 Table of Contents

🔍 Overview

✨ Key Features

🛠 Technical Specifications

🔬 Advanced Hardware Design

1️⃣ 4-Layer PCB & Signal Integrity

2️⃣ Differential Pair Routing (USB D+/D-)

3️⃣ RF Keep-Out Zone

4️⃣ Power Design — AMS1117-3.3 LDO

5️⃣ Decoupling & Bypass Capacitors

📐 PCB Layer Stackup

🔌 Pinout & Peripherals

📂 Repository Structure

🏭 Manufacturing

Service	Notes
JLCPCB	Recommended — affordable 4-layer PCBs
PCBWay	Good quality, various finish options
OSH Park	US-based, ENIG finish standard

Parameter	Value
Layers	4
PCB Color	Black (recommended)
Surface Finish	HASL or ENIG
Board Thickness	1.6mm
Copper Weight	1oz outer / 0.5oz inner
Min Trace/Space	0.15mm
Min Hole Size	0.3mm