Potentiometers

 
DESCRIPTION:
 The goal of this assignment was to introduce us to controlling LEDs with potentiometers. I used two potentiometers in the circuit, one that controlled brightness of the LEDs, and one that controlled blinking. I put a diffuser over it so I could see the colours fade into each other better. Because of the pots, I had control over the LEDs at an extended range.
COMPONENTS: 

1- Arduino Uno
1- Breadboard

1- USB Cable
2- Potentiometers
3- 220Ω Resistors

3- LEDs, RGB
/*
 * one pot dims, the other pot changes the blinking rate
 * modification of the following
 * http://www.arduino.cc/en/Tutorial/AnalogInput
 */
int pot1Pin = 11;   // select the input pin for the potentiometer 1
int pot2Pin = 12;   // select the input pin for the potentiometer 2
int pot1Val = 0;   // variable to store the value coming from pot 1
int pot2Val = 0;   // variable to store the value coming from pot 2
int led1Pin = 9;   // select the pin for the LED 1
int led2Pin = 8;  // select the pin for the LED 2
void setup() {
   pinMode(led1Pin, OUTPUT);  // declare the led1Pin as an OUTPUT
   pinMode(led2Pin, OUTPUT);  // declare the led2Pin as an OUTPUT
}
void loop() {
   pot1Val = analogRead(pot1Pin);   // read the value from pot 1, between 0 - 1024, for dimming
   pot2Val = analogRead(pot2Pin);   // read the value from pot 2, between 0 - 1024, for blinking
   analogWrite(led2Pin, pot1Val/4); // dim LED to value from pot1
   delay(pot2Val);                  // stop the program for some time, meaning, LED is on for this time
   analogWrite(led2Pin, 0);         // dim LED to completely dark (zero)
   delay(pot2Val);                  // stop the program for some time, meaning, LED is OFF for this time
}