How to Use Power Supply: Examples, Pinouts, and Specs

The DROK 12V to 5V Buck Converter is a compact and efficient power supply module designed to step down a 12V DC input to a stable 5V DC output. This device is ideal for powering low-voltage electronic components and systems, ensuring reliable and consistent performance. Its small size and high efficiency make it suitable for a wide range of applications.

• Powering microcontrollers (e.g., Arduino, Raspberry Pi)
• Supplying power to sensors, modules, and other low-voltage devices
• Automotive electronics for converting 12V car battery voltage to 5V
• DIY electronics projects and prototyping
• Portable power systems

The following table outlines the key technical details of the DROK 12V to 5V Buck Converter:

The DROK 12V to 5V Buck Converter has four pins for input and output connections. The table below describes each pin:

1. Connect the Input Voltage:

   • Attach the positive terminal of your DC power source (e.g., 12V battery) to the VIN+ pin.
   • Connect the negative terminal of the power source to the VIN- pin.

2. Connect the Output Voltage:

   • Connect the VOUT+ pin to the positive terminal of the device or circuit you want to power.
   • Connect the VOUT- pin to the ground of the device or circuit.

3. Verify Connections:

   • Double-check all connections to ensure proper polarity and avoid short circuits.

4. Power On:

   • Turn on the power source. The module will step down the input voltage to a stable 5V output.

• Input Voltage Range: Ensure the input voltage is within the specified range (8V to 22V DC). Exceeding this range may damage the module.
• Heat Dissipation: Although the module is highly efficient, it may generate heat under high current loads. Ensure proper ventilation or use a heatsink if necessary.
• Load Current: Do not exceed the maximum output current of 3A to prevent overheating or damage.
• Polarity: Always connect the input and output pins with the correct polarity to avoid damaging the module.

The DROK 12V to 5V Buck Converter can be used to power an Arduino UNO from a 12V power source. Below is an example circuit and code:

• Connect the VIN+ pin of the buck converter to the positive terminal of a 12V DC power source.
• Connect the VIN- pin to the ground of the power source.
• Connect the VOUT+ pin to the 5V pin of the Arduino UNO.
• Connect the VOUT- pin to the GND pin of the Arduino UNO.

// Example code for Arduino UNO powered by DROK 12V to 5V Buck Converter
// This code blinks 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: Incorrect input connections or insufficient input voltage.
   • Solution: Verify that the input voltage is within the 8V to 22V range and that the connections are correct.

2. Overheating:

   • Cause: Excessive load current or poor ventilation.
   • Solution: Reduce the load current to below 3A and ensure proper airflow around the module.

3. Output Voltage Fluctuations:

   • Cause: Unstable input voltage or excessive load.
   • Solution: Use a stable DC power source and ensure the load does not exceed the module's capacity.

4. Module Not Working After Connection:

   • Cause: Reverse polarity or input voltage exceeding the maximum limit.
   • Solution: Check and correct the polarity of the connections. Replace the module if it has been damaged.

Q1: Can this module be used with a 24V input?
A1: No, the maximum input voltage is 22V. Using a 24V input may damage the module.

Q2: Is the output voltage adjustable?
A2: No, the output voltage is fixed at 5V.

Q3: Can I use this module to power a Raspberry Pi?
A3: Yes, the module can provide a stable 5V output suitable for powering a Raspberry Pi. Ensure the current requirement does not exceed 3A.

Q4: Does the module have built-in overcurrent protection?
A4: No, the module does not have built-in overcurrent protection. Avoid exceeding the maximum current rating to prevent damage.