How to Use KY-054: Examples, Pinouts, and Specs

The KY-054 is a sound sensor module manufactured by Joy-it. It is designed to detect sound levels and convert them into an electrical signal, making it ideal for sound-activated projects. The module features a microphone and an onboard amplifier circuit to process sound signals. It is commonly used in applications such as voice-activated systems, sound-activated lights, and noise monitoring systems.

• Voice-activated devices
• Sound-activated lighting systems
• Noise level monitoring
• Audio-based security systems
• DIY electronics and Arduino projects

The KY-054 sound sensor module has the following technical specifications:

The KY-054 module has 4 pins, as described in the table below:

1. Power the Module: Connect the VCC pin to a 3.3V or 5V power source and the GND pin to the ground.
2. Choose an Output:
   • Use the AO pin for analog sound level readings.
   • Use the DO pin for digital sound detection based on the threshold set by the onboard potentiometer.
3. Adjust Sensitivity: Use the potentiometer on the module to adjust the sensitivity of the digital output. Turning it clockwise increases sensitivity, while turning it counterclockwise decreases sensitivity.
4. Connect to a Microcontroller: Connect the output pins (AO or DO) to the corresponding input pins on your microcontroller (e.g., Arduino).

Below is an example of how to use the KY-054 with an Arduino UNO to read both analog and digital outputs:

• VCC → 5V on Arduino
• GND → GND on Arduino
• AO → A0 on Arduino
• DO → D2 on Arduino

// KY-054 Sound Sensor Example with Arduino UNO
// Reads analog and digital outputs from the KY-054 module and prints them to the Serial Monitor.

const int analogPin = A0;  // Pin connected to AO (Analog Output)
const int digitalPin = 2;  // Pin connected to DO (Digital Output)

void setup() {
  pinMode(digitalPin, INPUT);  // Set digital pin as input
  Serial.begin(9600);         // Initialize serial communication at 9600 baud
}

void loop() {
  int analogValue = analogRead(analogPin);  // Read analog value from AO
  int digitalValue = digitalRead(digitalPin);  // Read digital value from DO

  // Print the values to the Serial Monitor
  Serial.print("Analog Value: ");
  Serial.print(analogValue);
  Serial.print(" | Digital Value: ");
  Serial.println(digitalValue);

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

• Power Supply: Ensure the module is powered within its operating voltage range (3.3V to 5V).
• Noise Interference: Avoid placing the module near high-frequency noise sources, as this may affect its performance.
• Sensitivity Adjustment: Fine-tune the potentiometer to achieve the desired sensitivity for your application.
• Output Stability: The digital output may fluctuate in noisy environments. Use software debouncing if necessary.

1. No Output from the Module:

   • Ensure the module is powered correctly (check VCC and GND connections).
   • Verify that the microphone is not physically damaged.
   • Check the sensitivity setting on the potentiometer.

2. Digital Output Always HIGH or LOW:

   • Adjust the potentiometer to set an appropriate sound threshold.
   • Ensure the sound source is within the module's detection range.

3. Analog Output Not Changing:

   • Verify the connection to the AO pin.
   • Ensure the sound source is producing a detectable sound level.

4. Interference or False Triggers:

   • Place the module away from high-frequency noise sources.
   • Use a decoupling capacitor across the power supply pins to reduce noise.

Q: Can the KY-054 detect specific frequencies?
A: No, the KY-054 is designed to detect general sound levels and does not differentiate between specific frequencies.

Q: How far can the KY-054 detect sound?
A: The detection range depends on the sound intensity and the sensitivity setting. It is most effective for sounds within a few meters.

Q: Can I use the KY-054 with a 3.3V microcontroller?
A: Yes, the KY-054 is compatible with both 3.3V and 5V systems.

Q: Is the KY-054 suitable for outdoor use?
A: The KY-054 is not weatherproof and should be used in indoor environments or protected from moisture and extreme temperatures.