Work in progress.. deciphering the source code.

Here's how we have progressed with the Water-Balls project. Here's the source code, followed by the images of the circuit that works using the Arduino software along with the source code.

ARDUINO SOURCE CODE –

/*

GP2D120 sensor example

by Tom Igoe

Reads a changing voltage from a GP2D120 IR ranging sensor

on analog input 0 and sends the result out in ASCII-encoded

decimal numbers.

Arduino/ATMega8 hardware connections:

A0/PC5: potentiometer on analog in 1

D0/PD0/RX0: Serial input from the PC via MAX232 or hex inverter

D1/PD1/TX0: Serial output to PC via MAX232 or hex inverter

Distance ranging formula comes from Acroname, http://www.acroname.com:

http://www.acroname.com/robotics/info/articles/irlinear/irlinear.html

Created 6 Oct. 2005

Updated 25 Oct. 2005

*/

int val; // outgoing ADC value

int distance = 0;

int ledPin = 11;

int outPut = 0;

//function prototype:

//void blink(int howManyTimes);

void setup()

{

// start serial port at 9600 bps:

beginSerial(9600);

// blink(3);

}

void loop()

{

// read analog input:

val = analogRead(0);

// send analog value out:

printString("Analog Value =\t");

//Serial.println(val);

// Calculate linear slope of reading (thanks, Acroname!):

distance = (2914 / (val + 5)) - 1;

printInteger(distance);

outPut = distance

;printString("\n\r");

lightLED(distance);

//analogWrite(ledPin, outPut);

// wait 10ms for ADC to reset before next reading:

// delay(10);

}

void lightLED(int value){

if( value == 9 ){

analogWrite(ledPin,0);

}else if (value == 8 ){

for( int i=0;i<30;>

outPut=i;

analogWrite(ledPin, i);

delay(50);

}

//Serial.println("distance = 8");

}else if (distance == 7){

for( int i=30;i<90;>

outPut=i;

delay(10);

analogWrite(ledPin,outPut);

}

}else if (distance == 6 ){

for( int i=90;i<120;>

outPut=i;

delay(10);

analogWrite(ledPin,outPut);

}

}else if (distance == 5 ){

for( int i=120;i<150;>

outPut=i;

analogWrite(ledPin,outPut);

}

}else if (distance == 4 ){

for( int i=150;i<180;>

outPut=i;

analogWrite(ledPin,outPut);

}

}else if (distance == 3 ){

for( int i=180;i<255;>

outPut=i;

analogWrite(ledPin,outPut);

}

}

}

// Blink the reset LED:

Here's the Schematic Circuit Diagram:

And here are the images of the work we did today: