Lab 3: Sensing Part 1 - Potentiometers

DESCRIPTION
In this lab, I soldered wires to potentiometers (pots) then setup my circuit/code to control one LED's brightness with a pot. Using a different code and the same circuit setup, I could control one LED's blinking rate with a pot. Next I modified my circuit to include 2 pots and used the code provided to control blinking rate and brightness independently with different pots.
For the homework, I first modified my code to have one pot control the brightness of all 3 LEDs together and one pot control the blinking rate of all 3 LEDs together (first code listed). Then, I modified the code so that the first pot still controlled the uniform brightness of the LEDs, but the second pot controlled the alternating blinking rate between the 3 LEDs. The code/LEDs are setup to blink in a line (green, red, blue, green, etc.) so they can "chase" each other with the chasing speed controlled by the second pot.

COMPONENTS USED
1- Arduino Uno (and USB cable/laptop)
3- LEDs (RGB)
3- 220Ω Resistors
1- Breadboard
2- 10kΩ Potentiometers
22 gauge wire

CODE #1: UNIFORMLY BLINKING LEDS
/*
 * one pot dims, the other pot changes the blinking rate of the 3 LEDs blinking in unison
 * modification of the following
 * http://www.arduino.cc/en/Tutorial/AnalogInput
 */
int pot1Pin = A0;   // select the input pin for the potentiometer 1
int pot2Pin = A1;   // 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 = 10;  // select the pin for the LED 2
int led3Pin = 11; //select the pin for the LED 3
void setup() {
   pinMode(led1Pin, OUTPUT);  // declare the led1Pin as an OUTPUT
   pinMode(led2Pin, OUTPUT);  // declare the led2Pin as an OUTPUT
}

//code for uniform blinking LEDs
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(led1Pin, pot1Val/4); // dim LED to value from pot1
   analogWrite(led2Pin, pot1Val/4);
   analogWrite(led3Pin, pot1Val/4);
   delay(pot2Val);               

   // stop the program for some time, meaning, LED is on for this time
   analogWrite(led1Pin, 0);         // dim LED to completely dark (zero)
   analogWrite(led2Pin, 0);
   analogWrite(led3Pin, 0);
   delay(pot2Val);                  // stop the program for some time, meaning, LED is OFF for this time
}

CODE #2: "CHASING LEDS"
/*
 * one pot controls brightness, the other pot changes the alternating blinking rate of 3 LEDs so they are "chasing" each other
 * modification of the following
 * http://www.arduino.cc/en/Tutorial/AnalogInput
 */
int pot1Pin = A0;   // select the input pin for the potentiometer 1
int pot2Pin = A1;   // 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 = 10;  // select the pin for the LED 2
int led3Pin = 11; //select the pin for the LED 3
void setup() {
   pinMode(led1Pin, OUTPUT);  // declare the led1Pin as an OUTPUT
   pinMode(led2Pin, OUTPUT);  // declare the led2Pin as an OUTPUT
}

//code for "chasing" LEDs
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(led1Pin, pot1Val/4); // dim LED to value from pot1
   delay(pot2Val);                  // stop the program for some time, meaning, LED is on for this time
   analogWrite(led1Pin, 0);         // dim LED to completely dark (zero)
   delay(pot2Val);                  // stop the program for some time, meaning, LED is OFF for this time
   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
   analogWrite(led3Pin, pot1Val/4); // dim LED to value from pot1
   delay(pot2Val);                  // stop the program for some time, meaning, LED is on for this time
   analogWrite(led3Pin, 0);         // dim LED to completely dark (zero)
   delay(pot2Val);                  // stop the program for some time, meaning, LED is OFF for this time
}

IMAGE
(Sorry the circuit looks like a rat's nest).