OSOYOO Breakout Board for 38P ESP32

OVERVIEW

The Osoyoo 38P ESP32 Expansion Board is the right hand for ESP32 developers with its powerful features, wide compatibility and user-friendly design. Whether you are learning, developing or prototyping, it provides reliable support to help you turn your ideas into reality.

Since there are different specifications of 38P ESP32 modules in the market, we added two sets of 2*19p row mother, it can be compatible with 0.9/1.0/1.1 feet row pin spacing modules, which greatly improves its compatibility, if you need a 30pin esp32/esp8266 breakour board,  you can click this link.

It adds LED indicators for each GPIO port, so you can use the indicators to know the status of the pins and easily verify your prototype code without even wiring it up.

COMPATIBLE LIST

Most 38pin ESP32 modules support pin widths of 0.9/1.0/1.1 inch (22.86/25.4/27.94mm).

Features

1. Compatibility:
   • Supports most 38-pin ESP32 modules.
   • Includes two sets of 2×15-pin headers for enhanced compatibility with a variety of modules with pin widths of 0.9/1.0/1.1 inches (22.86/25.4/27.94 mm).
2. LED Indicators:
   • Each GPIO port has an LED indicator to display the status (high/low) of the pins, making it easier to debug and verify code without additional wiring.
   • Independent LED, The status LED is driven by the chip instead of the GPIO so the GPIO will not be affected.
3. Power Protection:
   • Features a reverse power protection circuit to prevent damage if the power is connected incorrectly.
   • On-board power switch for convenient control.
4. Power Options:
   • Dual power supply: 5V/2A and 3.3V/500mA, providing ample power for servos and sensors.
   • Automatic power switching between USB and external power sources.
   • External power input via screw terminals or DC jack (7-12V recommended).
5. Voltage Selection:
   • The V_Selector jumper allows you to choose between 3.3V and 5V for the V pin. By default, the V pin is set to 3.3V. Ensure the correct voltage is selected to avoid damaging the board or connected devices.
6. Easy Connectivity:
   • 2.54mm pitch pin headers and screw terminals for seamless connection to sensors, servos, and other peripherals.
   • On-board 3-pin interfaces with V and GND pins for easy sensor or servo connections.

TECH SPECS

DIAGRAM

1. 38P ESP32 connector: Two sets of 2×19-pin row headers for compatibility with various module pin spacings. Ensure correct orientation when inserting the module to avoid damage.
2. LED indicators: LEDs light up when GPIO pins are high and turn off when low.
3. 2.54mm pitch pinheads:  The S terminal directly connects to the ESP32, it comes with V and GND pins for easy connection to sensors or servos.
4. Screw terminal:  Connect to all GPIO headers with 2.54mm pitch.
5. XL1509 chip:  DC/DC converter supporting 5V/2A output.
6. ME6210A33M3G chip:LDO regulator for 3.3V/500mA output.
7. V selector: Jumper cap to select between 3.3V and 5V for the V pin.
8. Power switch: On-board switch for easy power control.
9. Power terminal block: We recommend using a 7-12V DC power supply.
10. DC005-2.1 socket: We recommend using a 7-12V DC power supply.
11. External power out pinheads: Can be used with an external DC power supply or to power other devices
12. SI2302 chip: N-Channel MOSFET, here we use it in a power supply screw terminal anti-reverse circuit
13. 74HC04 chips: It is a hex inverter. We use it to connect each I/O port to control the corresponding indicator.
14. Sensor Test Connectors: 8-pin male and female connectors make testing sensor modules easy.

Important Notes

1. Voltage Selection:
   • By default, the V pin is set to 3.3V. Do not connect 5V devices to the GPIO pins when using this setting.
   • If using an external power supply, ensure the jumper cap on the V_Selector is correctly placed for the desired voltage (3.3V or 5V).
2. Power Supply:
   • Do not use both the DC jack and screw terminal simultaneously to avoid damaging the board.
   • If powering via USB, the V pin will not output voltage unless the jumper cap is removed from the V_Selector and connected to the S-3V3 pin.
3. Assembly:
   • Ensure the ESP32 module is correctly aligned before powering the board to prevent damage.

ASSEMBLY

When inserting, please pay attention to the boards‘ orientation，ensure the ESP32 is correctly connected before applying power to the power supply interface to avoid damaging the board due to misalignment.

(The ESP32 mocule is not included in this product, you will need to bring your own or buy it directly from the official website.)

Fritzing Part file download link:

https://osoyoo.com/public_html/driver/OSOYOO_Breakout_Board_for_Pico/2024009700-OSOYOO-Pico-IO.svg  (需要修改为ESP32 38P扩展板fritzing文件)

DIMENSIONS

Resources

• Schematic: Download Schematic
• Dimensions: Download Dimensions
• Fritzing File: Download Fritzing File需要修改为ESP32 & ESP8266 30P扩展板
• Arduino Test Code:
  • ESP32 Test Code
• Component Datasheets:
  • SI2302
  • 74HC04
  • XL1509
  • ME6210A33M3G
  • Screw_terminal_XK128-2.54MM
• Related Links
  • Official site of ESP32