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In this tutorial I Will show you how to turn on an led with your mouth. The Led will turn on when start to blow the sound sensor

Step 1: Material and Setup

Material needed for this project are:

  1. Linkit One Board
  2. an LED
  3. digital sound sensor
  4. 3 male to female jumper cable
  5. micro USB cable

To setup the linkit one board follow this link

the connection between the sensor and linkit one board:

sensor linkit one

5v<------------>5v

GND <-------> GND

Out <---------> D2

Step 2: The Code

Upload this code to your linkit one board. This is actually the digital pull up example from the arduino ide

/*
Input Pullup Serial

This example demonstrates the use of pinMode(INPUT_PULLUP). It reads a digital input on pin 2 and prints the results to the serial monitor.

The circuit: * Momentary switch attached from pin 2 to ground * Built-in LED on pin 13

Unlike pinMode(INPUT), there is no pull-down resistor necessary. An internal 20K-ohm resistor is pulled to 5V. This configuration causes the input to read HIGH when the switch is open, and LOW when it is closed.

created 14 March 2012 by Scott Fitzgerald

http://www.arduino.cc/en/Tutorial/InputPullupSerial

This example code is in the public domain

*/

void setup() { //start serial connection Serial.begin(9600); //configure pin2 as an input and enable the internal pull-up resistor pinMode(2, INPUT_PULLUP); pinMode(13, OUTPUT);

}

void loop() { //read the pushbutton value into a variable int sensorVal = digitalRead(2); //print out the value of the pushbutton Serial.println(sensorVal);

// Keep in mind the pullup means the pushbutton's // logic is inverted. It goes HIGH when it's open, // and LOW when it's pressed. Turn on pin 13 when the // button's pressed, and off when it's not: if (sensorVal == HIGH) { digitalWrite(13, LOW); } else { digitalWrite(13, HIGH); } }

Step 3: Test It Out

After you upload the code. open serial monitor then when you blow the sound sensor you will see the LED will also turn on.

The longer you blow, the longer the LED will turn on

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