Difference between revisions of "Sound Detection Sensor"

Outline

Sound detection sensor can detect sound intensity but cannot recognize the specified sound.
Inside the sensor, there is sound sensitive electret-condenser microphone. Acoustic wave triggers vibration of the thin electret film and causes capacitance change, generating subtle voltage. The voltage is converted to 0-5v, which can be recognized and received by mCookie-CoreUSB.

Specification

• Electrical specification
  • Operation voltage: 3V~5V
  • Input Device
• Tech parameters
  • Voltage: 0～5V（100Hz～4000Hz）
  • Sound intensity: 45～120dB
  • Accuracy:±1%
• Size
  • Size of the sensor: 5mm*5mm
  • Size of the board: 20mm*20mm
• 1.27mm-pith 4PIN interface;
• Connection method
  • Output: 0~5V analog signal
  • Pin Description: GND, VCC, signal output and NC(Empty). The output signal is simulated, thus, it needs analog interface to detect(A0-A7). You can connect it to A6,A2,A0 of the Hub.

Development

Equipment

• Other Hardware Equipment
  • One USB cable

Preparation

• Setup 1: Connect Microduino-Sound and the A0 analog port of the Hub together. That analog port A0 is the pin of detecting sound. Users can change that according to personal needs.

• Setup 2: Stack the CoreUSB, Hub and Sound modules to the computer with a USB cable.

Experiment: To Detect Sound Intensity

• Open Arduino IDE and copy the following code into the IDE.

#define mic_pin A0

int sensorValue;

// the setup routine runs once when you press reset:
void setup() {
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
  pinMode(mic_pin, INPUT);
}

// the loop routine runs over and over again forever:
void loop() {
  // read the input on analog pin 0:
  sensorValue = analogRead(mic_pin);
  // print out the value you read:
  Serial.print("Sound:");
  Serial.println(sensorValue);
  delay(100);        // delay in between reads for stability
}

• Choose the right port from Tools→Serial Port in Arduino IDE after compiling.

• Upload the program directly.

• After the upload, you can open the serial monitor. The displayed value reflects the current sound intensity.

Program Debugging

• "#define mic_pin A0" defines the pin of controlling LED; A0 means Microduino A0 pin, which can connect to A6, A2, A0.
• Adopt "analogRead(mic_pin)" to read sound values.

Video