How to Use Hi Link 5V 3W: Examples, Pinouts, and Specs

The Hi Link HLK-PM01 is a compact and efficient power supply module designed to convert AC mains voltage (100-240V AC) into a stable 5V DC output. With a power rating of 3 watts, this module is ideal for powering small electronic devices and embedded systems. Its small form factor and high efficiency make it a popular choice for applications requiring reliable DC power in a compact space.

• Powering microcontrollers (e.g., Arduino, ESP8266, ESP32, Raspberry Pi Pico)
• IoT devices and smart home systems
• Industrial control systems
• LED lighting and small DC motors
• Battery charging circuits
• Replacing bulky linear power supplies in compact designs

The HLK-PM01 module is designed to provide a stable and safe DC output while operating directly from AC mains. Below are its key technical details:

The HLK-PM01 module has six pins, divided into two groups: AC input and DC output.

Note: Ensure proper isolation and safety precautions when working with AC mains voltage.

The HLK-PM01 module is straightforward to use but requires careful handling due to its direct connection to AC mains. Follow the steps below to integrate it into your circuit:

1. Connect the AC Input:

   • Connect the AC (L) pin to the live wire of the AC mains.
   • Connect the AC (N) pin to the neutral wire of the AC mains.
   • Ensure proper insulation and secure connections to avoid electrical hazards.

2. Connect the DC Output:

   • Use the +5V pin to power your circuit's positive rail.
   • Connect the GND pin to the ground of your circuit.

3. Verify Connections:

   • Double-check all connections before powering the module.
   • Ensure there are no short circuits or loose wires.

4. Power On:

   • Apply AC mains voltage to the input pins.
   • Measure the output voltage using a multimeter to confirm a stable 5V DC output.

• Safety First: Always handle the module with care when connected to AC mains. Use proper insulation and avoid touching the module while powered.
• Heat Dissipation: Ensure adequate ventilation around the module to prevent overheating.
• Load Requirements: Do not exceed the maximum output current of 600mA to avoid damaging the module.
• Isolation: Use optocouplers or relays if interfacing the module with sensitive circuits to ensure electrical isolation.
• Testing: Test the module with a resistive load (e.g., a 10Ω, 5W resistor) before connecting it to your final circuit.

The HLK-PM01 can be used to power an Arduino UNO directly. Below is an example circuit and code to blink an LED using the module:

1. Connect the +5V output of the HLK-PM01 to the 5V pin of the Arduino UNO.
2. Connect the GND output of the HLK-PM01 to the GND pin of the Arduino UNO.
3. Connect an LED with a 220Ω resistor to pin 13 of the Arduino UNO.

// Simple LED Blink Example
// This code blinks an LED connected to pin 13 of the Arduino UNO.

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

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
}

Warning: Ensure the HLK-PM01 is properly insulated and isolated from human contact when connected to AC mains.

1. Can the HLK-PM01 power a Raspberry Pi?

   • No, the HLK-PM01 cannot provide sufficient current for a Raspberry Pi, which typically requires at least 2.5A.

2. Is the module safe for long-term use?

   • Yes, the HLK-PM01 is designed for long-term use, provided it is operated within its specified limits and proper safety precautions are followed.

3. Can I use the HLK-PM01 in outdoor applications?

   • The module is not weatherproof. Use it in a sealed, insulated enclosure for outdoor applications.

4. What happens if I reverse the AC input connections?

   • The module will not function correctly. Always ensure proper live and neutral connections.

By following this documentation, you can safely and effectively use the Hi Link HLK-PM01 module in your projects.