Electric parameter

Additional info i found interesting

http://www.accudiy.com/download/HC-SR04_Manual.pdf

Application on the HC-SR04 in my personal work

This component will be very useful for my project so i will try to use directly as part of my initial prototype of my project.

Because my skills in electronic are not so solid at this moment in order to facilitate the problem resolution process , i will execute the proof of concept in the following order:

1. Make the connection with an Arduino UNO board

2. Make a simple prototype based on Arduino UNO (INPUT BASED)

3. Simplify the code and make a more complicate prototype (INPUT/OUTPUT BASED)

4. Create my own Fabuino

5. Move the already working prototype (defined in pint 3) on Arduino UNO to my Fabuino

6. Recreate the final prototype to Fabuino with additional parts

STEP 1: Make the connection with an Arduino UNO board

Reference:

http://arduinobasics.blogspot.pe/2012/11/arduinobasics-hc-sr04-ultrasonic-sensor.html

Programming code

/*

 HC-SR04 Ping distance sensor:

 VCC to arduino 5v

 GND to arduino GND

 Echo to Arduino pin 7

 Trig to Arduino pin 8

 */

#define echoPin 7 // Echo Pin

#define trigPin 8 // Trigger Pin

#define LEDPin 13 // Onboard LED

int maximumRange = 200; // Maximum range needed

int minimumRange = 0; // Minimum range needed

long duration, distance; // Duration used to calculate distance

void setup() {

 Serial.begin (9600);

 pinMode(trigPin, OUTPUT);

 pinMode(echoPin, INPUT);

 pinMode(LEDPin, OUTPUT); // Use LED indicator (if required)

}

void loop() {

/* The following trigPin/echoPin cycle is used to determine the

 distance of the nearest object by bouncing soundwaves off of it. */

 digitalWrite(trigPin, LOW);

 delayMicroseconds(2);

 digitalWrite(trigPin, HIGH);

 delayMicroseconds(10);

 digitalWrite(trigPin, LOW);

 duration = pulseIn(echoPin, HIGH);

 //Calculate the distance (in cm) based on the speed of sound.

 distance = duration/58.2;

 if (distance >= maximumRange || distance <= minimumRange){

 /* Send a negative number to computer and Turn LED ON

 to indicate "out of range" */

 Serial.println("-1");

 digitalWrite(LEDPin, HIGH);

 }

 else {

 /* Send the distance to the computer using Serial protocol, and

 turn LED OFF to indicate successful reading. */

 Serial.println(distance);

 digitalWrite(LEDPin, LOW);

 }

 //Delay 50ms before next reading.

 delay(50);

}

Video of Step 1 : Make the connection with an Arduino UNO board

STEP 2:  Make a simple prototype based on Arduino UNO

I completely know that the first step was just copying and hoping to work, now i will create something more specific to my needs.

So i joint 2 SR04 with an angle of 120 degrees and with some carton and paper made an ugly box to support both of them. Also i use a support in order to include a servo motor and add algorith for following my hand.

Video of Step 1 : Make a simple prototype based on Arduino UNO

STEP 3: Simplify the code and make a more complicate prototype (INPUT/OUTPUT BASED)

    #define trigPin1 8

    #define echoPin1 7

    #define led1 12

    #define alarm 3

    long duration, distance, UltraSensor;

    float sinVal;

    int toneVal;

    void setup()

    {

    Serial.begin (9600);

    pinMode(trigPin1, OUTPUT);

    pinMode(echoPin1, INPUT);

    pinMode(led1,OUTPUT);

    pinMode(alarm,OUTPUT);

    }

    void loop() {

    SonarSensor(trigPin1, echoPin1);

    UltraSensor = distance;

    Serial.println(UltraSensor);

    if (UltraSensor < 10)

        {

    digitalWrite(led1, HIGH);

    for (int x=0; x<180; x++) {

    // convert degrees to radians then obtain sin value

    sinVal = (sin(x*(3.1412/180)));

    // generate a frequency from the sin value

    toneVal = 2000+(int(sinVal*1000));

    tone(alarm, toneVal);

  }

delay(100);

}

else

{

    digitalWrite(led1, LOW);

    noTone(alarm);

}

    }

    void SonarSensor(int trigPin,int echoPin)

    {

    digitalWrite(trigPin, LOW);

    delayMicroseconds(2);

    digitalWrite(trigPin, HIGH);

    delayMicroseconds(10);

    digitalWrite(trigPin, LOW);

    duration = pulseIn(echoPin, HIGH);

    distance = (duration/2) / 29.1;

    delay(100);

    }

This prototype now include INPUT (Ultrasound sensor), OUTPUT (LED and PIEZO)

4. Create my own Fabuino

Please refer to Chapter of Electronic Design

5. Move the already working prototype (defined in point 3) on Arduino UNO to my Fabuino

Now the challenge to move my already working prototype to my own Fabuino

St first i planned in powerpoint how to use the new Fabuino and how to move the pinout

Also analyze the pinout differences and define the input and output components

At last move the cables from one board to another

6. Recreate the final prototype to Fabuino with better looking parts