How to Use DC-DC 12V to 3.3V 5V 12V Power Module: Examples, Pinouts, and Specs

The Hailege DC-DC 12V to 3.3V 5V 12V Power Module (Manufacturer Part ID: B07Z3FPNTK) is a versatile power conversion module designed to step down a 12V input voltage to multiple output voltages, including 3.3V, 5V, and 12V. This module provides stable and efficient power for a wide range of electronic devices, making it an essential component for embedded systems, IoT devices, and prototyping projects.

• Powering microcontrollers such as Arduino, ESP32, or Raspberry Pi.
• Supplying stable voltage to sensors, relays, and other peripherals.
• Prototyping circuits requiring multiple voltage levels.
• Battery-powered systems where efficient voltage regulation is critical.

Below are the key technical details of the Hailege DC-DC Power Module:

The module has a simple pinout for easy integration into circuits:

1. Connect the Input Voltage:

   • Attach the VIN pin to a 12V DC power source.
   • Connect the GND pin to the ground of the power source.

2. Select the Desired Output Voltage:

   • Use the VOUT 3.3V, VOUT 5V, or VOUT 12V pins to power your devices.
   • Ensure the connected device does not exceed the maximum current rating of the module.

3. Verify Connections:

   • Double-check all connections to avoid short circuits or incorrect wiring.

4. Power On:

   • Turn on the 12V power source. The module will regulate the voltage and provide stable outputs.

• Heat Dissipation: If the module is used at high currents (close to 2A), ensure proper ventilation or add a heatsink to prevent overheating.
• Load Compatibility: Verify that the connected devices are compatible with the output voltage and current ratings.
• Polarity Protection: Ensure correct polarity when connecting the input voltage to avoid damaging the module.
• Noise Filtering: For sensitive applications, consider adding capacitors at the output pins to reduce noise.

The 5V output of the module can be used to power an Arduino UNO. Below is an example circuit and code:

• Connect the VIN pin of the module to a 12V DC power source.
• Connect the GND pin of the module to the ground of the power source and Arduino.
• Connect the VOUT 5V pin of the module to the 5V pin of the Arduino UNO.

// Example code to blink an LED using Arduino UNO powered by the DC-DC module

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. No Output Voltage:

   • Cause: Incorrect wiring or insufficient input voltage.
   • Solution: Verify the input voltage is 12V and check all connections.

2. Overheating:

   • Cause: Excessive current draw or poor ventilation.
   • Solution: Reduce the load current or add a heatsink to the module.

3. Voltage Instability:

   • Cause: Noise or insufficient filtering.
   • Solution: Add capacitors (e.g., 10µF and 0.1µF) across the output pins.

4. Device Not Powering On:

   • Cause: Incorrect output voltage selection.
   • Solution: Ensure the device is connected to the correct output pin (3.3V, 5V, or 12V).

• Use a multimeter to measure the input and output voltages for debugging.
• Avoid exceeding the maximum current rating to prevent damage to the module.
• If the module fails to operate, inspect for physical damage or burnt components.

By following this documentation, users can effectively integrate the Hailege DC-DC 12V to 3.3V 5V 12V Power Module into their projects and ensure reliable performance.