How to Use LSA-002 AC Dimmer: Examples, Pinouts, and Specs

The LSA-002 AC Dimmer is a versatile electronic component designed to control the brightness of AC-powered lighting fixtures. By adjusting the voltage and current supplied to the light source, the LSA-002 enables precise dimming, offering energy savings and the ability to create customized lighting ambiance. This component is widely used in residential, commercial, and industrial lighting systems.

• Dimming incandescent and halogen light bulbs
• Controlling the brightness of dimmable LED lights (if compatible)
• Smart home lighting systems
• Stage lighting and decorative lighting setups
• Energy-efficient lighting control in offices and homes

The LSA-002 AC Dimmer is designed to work with standard AC mains voltage and supports a wide range of lighting loads. Below are its key technical details:

The LSA-002 AC Dimmer typically has the following pin configuration:

The LSA-002 AC Dimmer is straightforward to use in a circuit. Below are the steps and best practices for integrating it into your project:

1. Connect the AC Input and Output:

   • Connect the AC mains voltage to the AC-IN terminal.
   • Connect the load (e.g., light bulb) to the AC-OUT terminal.

2. Power the Control Circuit:

   • Provide a 5V DC power supply to the VCC pin.
   • Connect the GND pin to the ground of your control circuit.

3. Control the Dimming Level:

   • Use a microcontroller (e.g., Arduino UNO) to generate a PWM signal.
   • Connect the PWM output of the microcontroller to the PWM pin of the dimmer.

4. Adjust the PWM Duty Cycle:

   • A higher duty cycle increases the brightness of the light.
   • A lower duty cycle decreases the brightness.

• Load Compatibility: Ensure the connected load is dimmable and does not exceed the maximum power rating (400W).
• Isolation: The LSA-002 includes opto-isolation for safety, but always handle AC connections with care.
• PWM Frequency: Use a PWM frequency between 100Hz and 1kHz for optimal dimming performance.
• Heat Dissipation: If operating near the maximum load, ensure proper ventilation or heat sinking to prevent overheating.
• Safety Precautions: Always disconnect the AC mains power before making any connections or modifications.

Below is an example of how to control the LSA-002 AC Dimmer using an Arduino UNO:

// Example code to control the LSA-002 AC Dimmer with an Arduino UNO
// This code generates a PWM signal on pin 9 to adjust the dimming level.

const int pwmPin = 9; // PWM output pin connected to the LSA-002 PWM input

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

void loop() {
  // Gradually increase brightness
  for (int dutyCycle = 0; dutyCycle <= 255; dutyCycle++) {
    analogWrite(pwmPin, dutyCycle); // Write PWM signal to the dimmer
    delay(10); // Small delay for smooth dimming
  }

  // Gradually decrease brightness
  for (int dutyCycle = 255; dutyCycle >= 0; dutyCycle--) {
    analogWrite(pwmPin, dutyCycle); // Write PWM signal to the dimmer
    delay(10); // Small delay for smooth dimming
  }
}

1. The light does not turn on:

   • Ensure the AC mains voltage is properly connected to the AC-IN terminal.
   • Verify that the load is connected to the AC-OUT terminal.
   • Check that the load is dimmable and within the power rating of the dimmer.

2. Flickering light:

   • Ensure the PWM frequency is within the recommended range (100Hz to 1kHz).
   • Verify that the load is compatible with dimming (some LEDs may require specific dimmers).

3. Overheating:

   • Check that the load does not exceed the maximum power rating (400W).
   • Ensure proper ventilation or add a heat sink if necessary.

4. No response to PWM signal:

   • Verify the PWM signal is being generated correctly by the microcontroller.
   • Check the connections between the microcontroller and the PWM pin.

Q: Can the LSA-002 be used with non-dimmable LEDs?
A: No, the LSA-002 is designed for dimmable loads only. Using it with non-dimmable LEDs may cause flickering or damage to the light.

Q: What happens if I exceed the maximum load power?
A: Exceeding the maximum load power (400W) can cause overheating, damage to the dimmer, or even pose a fire hazard. Always ensure the load is within the specified limits.

Q: Can I use the LSA-002 with a 3.3V microcontroller?
A: Yes, but you may need a level shifter to ensure the PWM signal is compatible with the dimmer's input requirements.

Q: Is the LSA-002 suitable for outdoor use?
A: The LSA-002 is not weatherproof. If used outdoors, it must be enclosed in a weatherproof housing.