ESP32 Expanded Board

This is an expanded board for LCKFB-ESP32S3R8N8 which ia an open-sourced ESP32s3 minimum system board. You can find the schematic and PCB layout of the board here. Hope you can have fun with this board!

Features

• Power
  • 12V power input via XT30 connector (3S battery supported)
  • Dual 12V output via XH2.54 connectors
  • 12V to 5V DC-DC converter (TPS5450DDAR) supporting up to 5A current (For output currents above 3A, solder mask openings with tin plating should be implemented on copper traces to enhance current handling. More info and where the step-down converter circuit from)
  • Dual 5V output via XH2.54 connectors
• Peripherals
  • 12V bus servo (Hiwonder HTS-20H is recommended)
  • Dual 12V DC motors via XH2.54 connectors and PH2.0 connectors (motor driver: TB6612FNG)
  • One SPI via XH2.54 connector
  • Dual I2C via XH2.54 connectors (With another 4 pin header for a 0.96" OLED screen)
  • 14 GPIO pins supporting I2C, SPI, LCD, ACM, PWM, I2S, UART, SDIO etc. with 5V and GND (GPIO21,GPIO38-GPIO40,GPIO46-GPIO48 should not be used when the other connectors are in use. More info about the pin definition in the datasheet)
  • UART pins for TX, RX and GND

If you find any issues for the board, please check the schematic and PCB layout first or contact me.

File Structure

• .epro: Schematic and PCB layout for Easy EDA
• .zip: Schematic and PCB layout for Altium Designer

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© 2025 Yanhan Sun (Frank).