How to Use XH-M604: Examples, Pinouts, and Specs

The XH-M604 is a DC-DC buck converter module designed to step down voltage from a higher input level to a lower, stable output voltage. This module is highly efficient and widely used in power supply circuits for various electronic applications. Its compact design and adjustable output make it suitable for projects requiring precise voltage regulation.

• Powering low-voltage devices from higher-voltage sources (e.g., 12V to 5V conversion)
• Battery-powered systems to regulate voltage levels
• DIY electronics projects requiring stable power supplies
• LED drivers and motor controllers
• Arduino and microcontroller-based projects

The XH-M604 module is equipped with adjustable voltage regulation and high efficiency. Below are its key technical details:

1. Connect the Input Voltage:

   • Connect the positive terminal of your power source to the VIN+ pin.
   • Connect the ground terminal of your power source to the VIN- pin.
   • Ensure the input voltage is within the range of 4V to 38V DC.

2. Connect the Output Load:

   • Connect the positive terminal of your load to the VOUT+ pin.
   • Connect the ground terminal of your load to the VOUT- pin.

3. Adjust the Output Voltage:

   • Use the onboard potentiometer to adjust the output voltage.
   • Turn the potentiometer clockwise to increase the output voltage and counterclockwise to decrease it.
   • Use a multimeter to measure the output voltage for precise adjustment.

4. Power On:

   • Once all connections are secure, power on the input source.
   • Verify the output voltage and ensure it matches the requirements of your load.

• Heat Dissipation: For currents above 2A, ensure proper heat dissipation by attaching a heatsink or using active cooling (e.g., a fan).
• Input Voltage: Always ensure the input voltage is higher than the desired output voltage by at least 1.5V for proper operation.
• Polarity: Double-check the polarity of your connections to avoid damaging the module.
• Load Testing: Gradually increase the load to ensure the module operates within its rated current and voltage limits.

The XH-M604 can be used to power an Arduino UNO by stepping down a 12V input to 5V. Below is an example setup:

1. Connect a 12V DC power source to the VIN+ and VIN- pins of the XH-M604.
2. Adjust the potentiometer to set the output voltage to 5V.
3. Connect the VOUT+ pin to the Arduino's 5V pin and the VOUT- pin to the Arduino's GND pin.

Here is a simple Arduino code to blink an LED, powered by the XH-M604:

// Simple LED Blink Example
// Ensure the XH-M604 is providing a stable 5V to the Arduino UNO

const int ledPin = 13; // Built-in LED pin on Arduino UNO

void setup() {
  pinMode(ledPin, OUTPUT); // Set the LED pin 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. Can the XH-M604 increase voltage?

   • No, the XH-M604 is a buck converter and can only step down voltage.

2. What is the maximum current the module can handle?

   • The module can handle up to 5A with proper heat dissipation. For continuous operation, it is recommended to stay below 4A.

3. Can I use the XH-M604 with a battery?

   • Yes, the module can be used with a battery as long as the input voltage is within the specified range (4V to 38V).

4. How do I know if the module is overheating?

   • If the module becomes too hot to touch or the output voltage becomes unstable, it may be overheating. Use a heatsink or fan to mitigate this issue.

By following this documentation, you can effectively use the XH-M604 in your projects and troubleshoot common issues.