How to Use HLK-PM01: Examples, Pinouts, and Specs

The HLK-PM01 is a compact and efficient AC-DC power module manufactured by Hi-Link. It is designed to convert an input voltage range of 85-265V AC into a stable 5V DC output, making it ideal for powering low-power electronic devices. This module is widely used in IoT devices, home automation systems, embedded systems, and other applications requiring a reliable and compact power supply.

• IoT devices and smart home systems
• Microcontroller-based projects (e.g., Arduino, ESP8266, ESP32)
• Low-power embedded systems
• Industrial control systems
• LED lighting and small appliances

The HLK-PM01 is designed to provide a stable and efficient power supply with built-in safety features. Below are its key technical details:

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

Note: Pins 3 and 6 are not connected internally and should be left unconnected in your circuit.

1. AC Input Connection:

   • Connect the AC(N) pin to the neutral wire of the AC mains.
   • Connect the AC(L) pin to the live wire of the AC mains.
   • Ensure proper insulation and safety precautions when working with high-voltage AC.

2. DC Output Connection:

   • Connect the +5V pin to the positive terminal of your load or circuit.
   • Connect the GND pin to the ground terminal of your load or circuit.

3. Mounting and Insulation:

   • Mount the module securely on a PCB or enclosure.
   • Use proper insulation to prevent accidental contact with high-voltage pins.

4. Filtering and Decoupling:

   • Add a capacitor (e.g., 470µF electrolytic capacitor) across the output terminals to reduce noise and improve stability.
   • Optionally, add an EMI filter on the AC input side for better performance in noisy environments.

• Safety First: Always handle the module with care when working with AC mains. Ensure proper insulation and avoid touching live wires.
• Load Requirements: Do not exceed the maximum output current of 600mA to prevent damage to the module.
• Ventilation: Ensure adequate ventilation around the module to prevent overheating.
• Testing: Test the module with a multimeter before connecting it to your final circuit to verify proper operation.

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

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. Ensure the AC input is properly connected and insulated.

// Example code to blink an LED using Arduino UNO powered by HLK-PM01
// Ensure proper insulation and safety when working with AC mains.

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

void setup() {
  pinMode(ledPin, OUTPUT); // Set LED pin as 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
}

Warning: Always ensure the HLK-PM01 is properly insulated and mounted when working with AC mains to avoid electrical hazards.

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

   • No, the HLK-PM01 provides a maximum current of 600mA, which is insufficient for most Raspberry Pi models.

2. Is the HLK-PM01 safe for long-term use?

   • Yes, the module is designed for long-term use with built-in overcurrent and overvoltage protection. However, ensure proper insulation and ventilation.

3. Can I use the HLK-PM01 with a 12V DC output?

   • No, the HLK-PM01 is specifically designed for a 5V DC output. For 12V output, consider other Hi-Link modules like the HLK-PM12.

By following the guidelines and best practices outlined in this documentation, you can safely and effectively integrate the HLK-PM01 into your projects.