How to Use DSI8820 Laser Receiver Module [Bill Ludwig]: Examples, Pinouts, and Specs

The DSI8820 is a laser receiver module designed for high-speed data transmission and communication applications. It is capable of detecting laser signals with high sensitivity, making it an essential component in optical communication systems. The module is widely used in applications such as fiber-optic communication, laser-based distance measurement, and optical sensing systems. Its compact design and reliable performance make it suitable for both industrial and research purposes.

Below are the key technical details of the DSI8820 Laser Receiver Module:

The DSI8820 module has a simple pinout for easy integration into circuits. Below is the pin configuration:

1. Power Supply: Connect the VCC pin to a 3.3V or 5V power source and the GND pin to the ground of your circuit.
2. Enable the Module: Set the EN pin HIGH to activate the module. If this pin is left LOW, the module will remain in a disabled state.
3. Signal Output: The OUT pin will output a digital signal corresponding to the detected laser input. This pin can be connected to a microcontroller or other processing unit for further analysis.
4. Laser Alignment: Ensure that the laser source is aligned with the receiver module for optimal performance. The module is sensitive to wavelengths between 800nm and 1550nm.

• Power Supply Stability: Use a stable power supply to avoid noise or fluctuations in the output signal.
• Laser Safety: Always follow safety guidelines when working with laser sources to prevent damage to the module or harm to users.
• Ambient Light: Minimize ambient light interference by using the module in controlled lighting conditions or with proper shielding.
• Heat Management: Ensure adequate ventilation or heat dissipation if the module is used in high-temperature environments.

Below is an example of how to connect and use the DSI8820 with an Arduino UNO to detect laser signals:

• Connect the VCC pin of the DSI8820 to the 5V pin of the Arduino.
• Connect the GND pin of the DSI8820 to the GND pin of the Arduino.
• Connect the OUT pin of the DSI8820 to digital pin 2 of the Arduino.
• Connect the EN pin of the DSI8820 to digital pin 3 of the Arduino.

// DSI8820 Laser Receiver Module Example Code
// This code reads the output of the DSI8820 and prints the signal status to the Serial Monitor.

const int laserOutPin = 2; // Pin connected to the OUT pin of DSI8820
const int enablePin = 3;   // Pin connected to the EN pin of DSI8820

void setup() {
  pinMode(laserOutPin, INPUT); // Set OUT pin as input
  pinMode(enablePin, OUTPUT); // Set EN pin as output

  digitalWrite(enablePin, HIGH); // Enable the DSI8820 module
  Serial.begin(9600);           // Initialize Serial communication
}

void loop() {
  int laserSignal = digitalRead(laserOutPin); // Read the laser signal

  if (laserSignal == HIGH) {
    Serial.println("Laser signal detected!"); // Print message if signal is detected
  } else {
    Serial.println("No laser signal detected."); // Print message if no signal is detected
  }

  delay(500); // Wait for 500ms before reading again
}

1. No Output Signal Detected

   • Cause: The EN pin is not set HIGH.
   • Solution: Ensure the EN pin is connected to a HIGH signal to enable the module.

2. Interference from Ambient Light

   • Cause: Excessive ambient light affecting the laser detection.
   • Solution: Use the module in a controlled lighting environment or add shielding to block ambient light.

3. Unstable Output Signal

   • Cause: Power supply fluctuations or noise.
   • Solution: Use a stable power source and add decoupling capacitors near the VCC pin.

4. Short Detection Range

   • Cause: Misalignment of the laser source or insufficient laser power.
   • Solution: Align the laser source properly and ensure it operates within the module's sensitivity range.

Q1: Can the DSI8820 detect infrared lasers?
A1: Yes, the DSI8820 is sensitive to wavelengths between 800nm and 1550nm, which includes infrared lasers.

Q2: What is the maximum data transmission rate supported by the module?
A2: The DSI8820 supports data transmission rates of up to 10 Mbps.

Q3: Can I use the DSI8820 with a 3.3V microcontroller?
A3: Yes, the module operates within a voltage range of 3.3V to 5V, making it compatible with 3.3V microcontrollers.

Q4: Is the module suitable for outdoor use?
A4: The DSI8820 can be used outdoors, but precautions should be taken to minimize interference from sunlight and to protect the module from environmental factors like moisture and dust.