Assignment: Sensing: Potentiometers

Collaborators:

I did a configuration where one pot controls the LED brightness and the other one controls the rate of blinking. I modified the code to create a LED train, which gives the impression that the lights follow each other. Look at the video for any clarifications.

http://www.cs.berkeley.edu/~anuj/Ledtrain.mp4

(It was captured from a cellphone, but enough to give an idea).

int led_pin1 = 9;

int led_pin2 = 10;

int led_pin3 = 11;

int val1 = 0;

int val2 = 0;

int input2 = 4;

int input1 = 5;

void setup() {

pinMode(led_pin1, OUTPUT);

pinMode(led_pin2, OUTPUT);

pinMode(led_pin3, OUTPUT);

}

void loop() {

val1 = analogRead(input1);   // read the value from pot 1, between 0 - 1024, for dimming

val2 = analogRead(input2);   // read the value from pot 2, between 0 - 1024, for blinking

analogWrite(led_pin1, val1/4); // dim LED to value from pot1

delay(val2/3);                  // stop the program for some time, meaning, LED is on for this time

analogWrite(led_pin2, val1/4); // dim LED to value from pot1

delay(val2/3);                  // stop the program for some time, meaning, LED is on for this time

analogWrite(led_pin3, val1/4); // dim LED to value from pot1

delay(val2/3);                  // stop the program for some time, meaning, LED is on for this time

analogWrite(led_pin1, 0);         // dim LED to completely dark (zero)

delay(val2/3);                  // stop the program for some time, meaning, LED is on for this time

analogWrite(led_pin2, 0);         // dim LED to completely dark (zero)

delay(val2/3);                  // stop the program for some time, meaning, LED is on for this time

analogWrite(led_pin3, 0);         // dim LED to completely dark (zero)

}