CONCEPT:

This project is an upgrade from my project (Red or Green?)from last week. The concept is the same. Four LEDs will be blinking (in a random fashion) and you must use the push button  to catch a colour or your choice. You may use the potentiometer to change the speed of the blinking to make the game harder or easier for yourself. 

BEHAVIOUR:

The assignment states that I must use one digital input and one digital output to control at least two LEDs in a digital and analog fashion respectively. The push button (digital input)  is used to pause the entire system and in a sense catch a colour. Because of its binary nature, it satisfies the digital input requirement of the assignment. Moreover, the potentiometer is used to control the speed on 6 different levels. As such, the range of values satifies the analog input requirement. Finally, as I am using more than 4 LEDs, I have also satisfied the more than 2 LEDs requirement.

SCHEMATIC:

PROBLEMS: 

I had a problem with the push button last week because I had not used a resistor with it. After clarifying the issue in class, I managed to set up the circuit. 

PROGRAM:

int red = 2;
int yellow = 3;
int blue = 4;
int green = 5;
int pushButton = 6;
int analog = A0;
int value = 0;
int sensorValue = 0;
int randomNo = 0;
int ledState = 0;
unsigned long previousMillis = 0;

int speedConstant = 100;
void setup() {
  // put your setup code here, to run once:
  pinMode(red, OUTPUT);
  pinMode(yellow, OUTPUT);
  pinMode(blue, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(pushButton, INPUT);
  Serial.begin(9600);
  randomNo = random(2, 6);
}
void loop() {
  // put your main code here, to run repeatedly:
  value =  digitalRead(pushButton);//reading from digital input
  Serial.println(value);
  //if the push button is pressed down, do not move onto the next LED
  if (value) {
  }
  else {

    //reading values from analog input
    sensorValue = analogRead(value);//reading from analog input
    sensorValue = map(sensorValue, 0, 1023, 0, 6);


    unsigned long currentMillis = millis();//blink without using delay function
    //LED blinks
    if (currentMillis - previousMillis >= speedConstant * sensorValue) {
      // save the last time you blinked the LED
      previousMillis = currentMillis;
      if (ledState) {
        digitalWrite(randomNo, LOW);
        randomNo = random(2, 6);
        digitalWrite(randomNo, HIGH);
      }
      ledState = !ledState;

    }

  }
}