How to Use MB102 Breadboard Power Supply Module 3.3V/5V: Examples, Pinouts, and Specs

The MB102 Breadboard Power Supply Module is a versatile and compact power solution designed for electronic hobbyists and professionals alike. This module is commonly used to provide both 3.3V and 5V DC power to breadboard-based prototype circuits, making it an essential tool for developing microcontroller projects, testing circuits, and educational purposes.

• Powering microcontroller platforms such as Arduino, Raspberry Pi, and PIC.
• Providing power to sensor modules, displays, and other electronic components during prototyping.
• Use in educational settings for teaching electronics and circuit design.

• Input Voltage: 6.5V to 12V DC via barrel jack or USB power.
• Output Voltage: 3.3V and 5V DC selectable via jumpers.
• Maximum Output Current:
  • 700 mA when powered via USB.
  • Up to 1A when powered via DC barrel jack (depending on input voltage and thermal conditions).
• Onboard Voltage Regulator for stable output.
• Power Rails: Dual rail design, providing both voltages simultaneously.

1. Connect the MB102 module to the breadboard aligning the pins with the power rails.
2. Select the desired output voltage (3.3V or 5V) by placing the jumper on the appropriate header.
3. Provide input power through the USB connector or the DC barrel jack.
4. Connect the power and ground lines from the module to your circuit.

• Ensure the input voltage is within the specified range to prevent damage.
• Do not exceed the maximum output current to avoid overheating and potential failure.
• Always disconnect power before making or altering connections to prevent shorts.
• Use decoupling capacitors close to power pins of sensitive components to reduce noise.

• No Output Voltage: Check input power source and connections. Ensure the jumper is correctly placed for the desired voltage.
• Voltage Fluctuations: Ensure the input voltage is stable and within the specified range. Check for overloading beyond the current limit.
• Overheating: Reduce the load if the module becomes too hot. Ensure adequate ventilation around the module.

• Verify connections and input power with a multimeter.
• If the module fails to power up, inspect for any visible damage or loose components.
• For noise-sensitive applications, add additional filtering on the output lines.

// Example code to demonstrate the use of the MB102 with an Arduino UNO

void setup() {
  // Set up the built-in LED pin as an output for testing
  pinMode(LED_BUILTIN, OUTPUT);
}

void loop() {
  // Turn the LED on for one second
  digitalWrite(LED_BUILTIN, HIGH);
  delay(1000);
  // Turn the LED off for one second
  digitalWrite(LED_BUILTIN, LOW);
  delay(1000);
  // This will create a blinking effect using the power from the MB102 module
}

Note: The above code assumes that the MB102 module is correctly set up and providing power to the Arduino UNO. Ensure that the voltage selection jumper on the MB102 is set to 5V when powering the Arduino UNO.

Remember to always double-check your connections and adhere to the best practices mentioned in the usage instructions to ensure a safe and successful project.