Custom ESP32-S3-MINI-1 Development Board

Overview

This repository contains the hardware design files for a custom ESP32-S3 4 layer development board. Built around the ESP32-S3-MINI-1 module, this board is designed for flexible IoT development.

The schematic and PCB layout were designed using KiCad V6 E.D.A.

Schematic:

PCB:

Layers:

3D View:

Hardware Features

This development board includes:

• Microcontroller: ESP32-S3-MINI-1 (Wi-Fi & Bluetooth LE).
• USB Interface: USB Type-C receptacle with dedicated ESD protection (D3V3XA4B10LP).
• Power Management: 5V to 3.3V LDO regulator (TLV75801PDBV) with a dedicated power indicator LED.
• Onboard Sensors & Outputs:
  • ENS210 Temperature and Humidity Sensor (connected via I2C).
  • WS2812B Addressable RGB LED for visual status feedback.
• User Controls: Physical BOOT and RESET tactile switches for easy flashing and debugging.
• Expansion: Two 22-pin headers breaking out GPIOs, I2C, UART, USB data lines, and power rails for easy breadboarding.

Acknowledgements & Design Methodology

The design of this custom board was verified and optimized following the hardware design tutorials by John Teel at Predictable Designs.

Related Documents & Resources

For detailed specifications on the core components and reference designs, please consult the following official Espressif documentation:

• ESP32-S3 Datasheet (PDF)
• ESP32-S3-MINI-1 & ESP32-S3-MINI-1U Datasheet (PDF)
• ESP32-S3-DevKitM-1 Schematic (PDF)
• ESP32-S3-DevKitM-1 PCB layout (PDF)
• ESP32-S3-DevKitM-1 Dimensions (PDF)
• ESP32-S3-DevKitM-1 Dimensions source file (DXF)

Repository Structure

• /Hardware - KiCad project files (.pro, .sch, .kicad_pcb).
• /Docs - Exported schematics, BOM, and Gerber files for manufacturing.
• /Firmware - Example code for testing the WS2812B LED and ENS210 sensor.