Assignment 

Bland, boring, basic potentiometer setup. No time to turn it into anything cool. I set up two potentiometers and used one to control the brightness of the three LEDs and the other to control their on/off frequency.

Components Used

Arduino Board
Breadboard
Potentiometers (2)
LEDs (Green, Blue, Yellow)
Jumpers (3)
220 Ohm Resistors (3)
Lengths of wire (13)

Arduino Code

/*
* One potentiometer controls the brightness of the LEDs and one controls their frequency
 */
int potPin1 = 1;
int potPin2 = 2;
int pCellPin1 = 0;
int ledPin = 9;   // select the pin for the LED

int input0val = 0;
int input1val = 0;      // variable to store the value coming from pot 1
int input2val = 0;      //variable to store the value coming from pot 2

int brightval = 0;
int delayval = 0;

void setup() {
  Serial.begin(9600);
}
void loop() {
  input0val = analogRead(pCellPin1);
  input1val = analogRead(potPin1);    // read the value from the sensor, between 0 - 1024
  input2val = analogRead(potPin2);     // read the value from the sensor, between 0 - 1024
 
  brightval = input1val;
  delayval = input2val;
 
  Serial.print("photocell: ");
  Serial.print(input0val);
  Serial.print(" brightness: ");
  Serial.println(brightval);
  Serial.print(" delay: ");
  Serial.println(delayval);
  analogWrite(9, brightval/4); // analogWrite can be between 0-255
  analogWrite(10, brightval/4);
  analogWrite(11, brightval/4);
  delay(delayval);
  analogWrite(9, 0); // analogWrite can be between 0-255
  analogWrite(10, 0);
  analogWrite(11, 0);
  delay(delayval);
}

 Item

Potentiometers controlling LED Brightness & Blink