How to Use T-Shape GPIO Extention Board: Examples, Pinouts, and Specs

The HALJIA T-Shape GPIO Extension Board (Part ID: 1909002C) is a versatile and user-friendly component designed to expand the number of General Purpose Input/Output (GPIO) pins available for microcontrollers and single-board computers. Its T-shaped layout facilitates easier connections and prototyping, making it an essential tool for hobbyists, students, and professionals working on electronic projects.

• Prototyping and Development: Ideal for breadboarding and testing new circuits.
• Educational Projects: Useful in teaching environments for demonstrating GPIO usage.
• IoT Projects: Expands GPIO capabilities for Internet of Things applications.
• Robotics: Provides additional GPIO pins for sensors, actuators, and other peripherals.

1. Power Supply:

   • Connect the 3.3V or 5V pin to the corresponding power supply on your microcontroller.
   • Connect the GND pin to the ground of your microcontroller.

2. Connecting GPIO Pins:

   • Use jumper wires to connect the GPIO pins on the extension board to the desired pins on your microcontroller.
   • Ensure that the GPIO pins are correctly mapped to the functions you intend to use.

3. Breadboarding:

   • The T-shape layout is designed to fit easily on a breadboard, allowing for quick and efficient prototyping.

• Voltage Compatibility: Ensure that the voltage levels of the GPIO pins are compatible with your microcontroller to avoid damage.
• Current Limitation: Do not exceed the current rating of 20mA per pin to prevent overheating and potential damage.
• Secure Connections: Make sure all connections are secure to avoid intermittent issues during operation.

// Example code to blink an LED connected to GPIO2 on the T-Shape GPIO Extension Board

const int ledPin = 2; // GPIO2 on the extension board

void setup() {
  pinMode(ledPin, OUTPUT); // Set GPIO2 as an output
}

void loop() {
  digitalWrite(ledPin, HIGH); // Turn the LED on
  delay(1000);                // Wait for 1 second
  digitalWrite(ledPin, LOW);  // Turn the LED off
  delay(1000);                // Wait for 1 second
}

1. No Power to the Board:

   • Solution: Check the power supply connections to ensure they are correctly connected to the 3.3V or 5V and GND pins.

2. GPIO Pins Not Responding:

   • Solution: Verify that the GPIO pins are correctly mapped and that the connections are secure. Check the microcontroller's code for any errors.

3. Intermittent Connections:

   • Solution: Ensure that all jumper wires and connections are firmly in place. Consider using shorter wires to reduce potential issues.

Q1: Can I use this extension board with a Raspberry Pi?

• A1: Yes, the HALJIA T-Shape GPIO Extension Board is compatible with Raspberry Pi and other single-board computers.

Q2: What is the maximum current I can draw from a single GPIO pin?

• A2: The maximum current rating for each GPIO pin is 20mA. Exceeding this limit may damage the board.

Q3: Can I use both 3.3V and 5V power supplies simultaneously?

• A3: No, you should use either the 3.3V or 5V power supply, not both at the same time, to avoid potential damage.

Q4: How do I know which GPIO pin corresponds to which function?

• A4: Refer to the pin configuration table provided in the technical specifications section of this documentation.

By following this documentation, users can effectively utilize the HALJIA T-Shape GPIO Extension Board to expand their GPIO capabilities and enhance their electronic projects.