How to Use Adjustable Voltage Output Buck Converter Multi-Channel Switching Power Supply Module: Examples, Pinouts, and Specs

The Adjustable Voltage Output Buck Converter Multi-Channel Switching Power Supply Module by Estink is a versatile and efficient power supply module designed to step down a higher input voltage to a lower, adjustable output voltage. This module supports multiple output channels, making it ideal for powering various devices and circuits simultaneously. Its compact design and high efficiency make it suitable for a wide range of applications, including DIY electronics projects, embedded systems, robotics, and industrial automation.

• Powering microcontrollers (e.g., Arduino, Raspberry Pi) and sensors
• Supplying power to LED strips and displays
• Battery-powered systems requiring regulated voltage
• Multi-channel power distribution in embedded systems
• Prototyping and testing circuits with different voltage requirements

Below are the key technical details of the Estink Adjustable Voltage Output Buck Converter:

The module typically features the following input and output connections:

1. Connect the Input Voltage:

   • Connect the positive terminal of your power source to the VIN+ pin.
   • Connect the negative terminal of your power source to the VIN- pin.
   • Ensure the input voltage is within the specified range (6V to 40V DC).

2. Adjust the Output Voltage:

   • Use the onboard potentiometer labeled ADJ to set the desired output voltage.
   • Turn the potentiometer clockwise to increase the voltage and counterclockwise to decrease it.
   • Use a multimeter to measure the output voltage at the VOUT+ and VOUT- terminals for precise adjustment.

3. Connect the Load:

   • Connect your load (e.g., microcontroller, LED strip) to the appropriate output channel (VOUT1+/VOUT1- or VOUT2+/VOUT2-).
   • Ensure the load does not exceed the maximum current rating of 3A per channel.

4. Power On:

   • Turn on the power source and verify the output voltage and current using a multimeter.

• Heat Dissipation: If the module operates at high currents (close to 3A), ensure proper heat dissipation by attaching a heatsink or providing adequate airflow.
• Input Voltage: Always ensure the input voltage is higher than the desired output voltage by at least 1.5V for stable operation.
• Short Circuit Protection: While the module may have basic protection, avoid shorting the output terminals to prevent damage.
• Multi-Channel Usage: When using multiple channels, ensure the total current draw does not exceed the module's thermal limits.

To power an Arduino UNO with a 5V regulated output from the module:

1. Set the input voltage to 12V DC.
2. Adjust the output voltage to 5V using the potentiometer.
3. Connect the VOUT1+ terminal to the Arduino's 5V pin and the VOUT1- terminal to the GND pin.

Here is a simple Arduino code to blink an LED, powered by the module:

// Blink an LED connected to pin 13
void setup() {
  pinMode(13, OUTPUT); // Set pin 13 as an output
}

void loop() {
  digitalWrite(13, HIGH); // Turn the LED on
  delay(1000);            // Wait for 1 second
  digitalWrite(13, LOW);  // Turn the LED off
  delay(1000);            // Wait for 1 second
}

1. No Output Voltage:

   • Cause: Input voltage is not connected or is below the minimum required level.
   • Solution: Verify the input voltage is within the 6V to 40V range and properly connected.

2. Output Voltage is Unstable:

   • Cause: Load current exceeds the module's capacity or input voltage is insufficient.
   • Solution: Reduce the load current or increase the input voltage.

3. Module Overheats:

   • Cause: High current draw without proper heat dissipation.
   • Solution: Attach a heatsink or improve airflow around the module.

4. Cannot Adjust Output Voltage:

   • Cause: Potentiometer is damaged or incorrectly adjusted.
   • Solution: Check the potentiometer for damage and adjust it carefully.

Q: Can I use this module to charge a battery?
A: Yes, but ensure the output voltage is set to the appropriate charging voltage for the battery type, and use a current-limiting circuit if necessary.

Q: Can I use both output channels simultaneously?
A: Yes, but ensure the total current draw does not exceed the module's thermal and electrical limits.

Q: Is the module protected against reverse polarity?
A: No, the module does not have built-in reverse polarity protection. Always double-check your connections before powering on.

Q: Can I use this module with an AC power source?
A: No, the module requires a DC input voltage. Use an AC-to-DC adapter if necessary.

This concludes the documentation for the Adjustable Voltage Output Buck Converter Multi-Channel Switching Power Supply Module by Estink.