How to Use LRS-100-15 Power Supply: Examples, Pinouts, and Specs

The LRS-100-15 Power Supply by Mean Well is a compact, low-cost, and highly efficient switching power supply. It delivers a stable 15V DC output with a maximum current of 6.67A, making it ideal for powering a wide range of electronic devices and systems. With its robust design and high reliability, the LRS-100-15 is suitable for industrial automation, LED lighting, communication equipment, and general-purpose electronics.

• Industrial control systems
• LED lighting and signage
• Communication equipment
• DIY electronics projects
• Laboratory power supplies

The following table outlines the key technical details of the LRS-100-15 Power Supply:

The LRS-100-15 features screw terminal connections for input and output. The pin configuration is as follows:

1. Mounting: Secure the power supply in a well-ventilated area to ensure proper heat dissipation. Avoid placing it near heat-sensitive components.
2. Input Connection:
   • Connect the L terminal to the live AC line.
   • Connect the N terminal to the neutral AC line.
   • Connect the FG terminal to the earth ground for safety.
3. Output Connection:
   • Connect the V+ terminal to the positive input of your load.
   • Connect the V- terminal to the ground of your load.
4. Voltage Adjustment (if needed):
   • Use a small screwdriver to turn the V ADJ potentiometer. Clockwise increases the output voltage, while counterclockwise decreases it. Ensure the voltage remains within the load's tolerance.

• Input Voltage: Ensure the input voltage is within the specified range (85-264V AC). Exceeding this range may damage the power supply.
• Load Requirements: Do not exceed the maximum output current of 6.67A. Overloading may trigger the built-in protection mechanisms or damage the unit.
• Ventilation: Maintain adequate airflow around the power supply to prevent overheating.
• Safety: Always disconnect the power supply from the mains before making any connections or adjustments.
• Fusing: Use an appropriate fuse on the input side for added protection.

The LRS-100-15 can be used to power an Arduino UNO and other peripherals. Below is an example circuit and code:

1. Connect the V+ terminal to the Arduino's VIN pin.
2. Connect the V- terminal to the Arduino's GND pin.
3. Ensure the output voltage is set to 15V or adjust it to 12V if required for compatibility.

// Example code to blink an LED using Arduino UNO powered by LRS-100-15
// Ensure the power supply output is properly connected to the Arduino VIN and GND.

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. Can I use the LRS-100-15 to power a 12V device?

   • Yes, but you must adjust the output voltage to 12V using the V ADJ potentiometer.

2. What happens if I exceed the maximum current rating?

   • The power supply has built-in overcurrent protection. It will shut down or reduce the output to protect itself and the connected load.

3. Is the LRS-100-15 suitable for outdoor use?

   • No, the LRS-100-15 is not weatherproof. Use it in a dry, indoor environment or within a suitable enclosure.

4. Can I use this power supply with a battery?

   • The LRS-100-15 is not designed for direct battery charging. Use a dedicated battery charger for this purpose.

By following the guidelines and recommendations in this documentation, you can safely and effectively use the LRS-100-15 Power Supply in your projects.