Instructables
Picture of ButtonHero
CIMG1446.JPG
ButtonHero Start Screen.png
ButtonHero is a game made on an Arduino that involves the use of buttons, LEDs, wires, and resistors. In this game, you have to hit the corresponding button to the light that is randomly selected before the light changes. You start with 5 lives and missing or being too slow subtracts one life. The high score is 56. Good luck!


Video of the Serial Monitor of the same game: http://screencast.com/t/PTaS3JwUu
 
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Step 1: Supplies

Picture of Supplies
Supplies include:
• 4 LEDs
• 4 pushbuttons
• 1 Arduino (we used a Dueilanove)
• 4  8.2kΩ resistors
• 4  100Ω resistors
• 4  0.56kΩ resistors
• lots of wire

Step 2: Schematic

Picture of Schematic

Here is the schematic for ButtonHero. The Fritzing file is also attached.

Step 3: The Code

Attached is the Arduino code file. 

Code:
int ledDelay; // LED timeout
int score; // points you get
byte currentLed; // the one that is lit up right now
boolean started; // Are you playing the game?
boolean needNewLed = true; // we need a new LED
byte health = 6; // health remaining
boolean updateScreen=true; // do we need to update the screen?
boolean lostHealth=false; // do we need to subtract one from the health?

int val2,val3,val4,val5;                        // variable for reading the pin status
int buttonState2,buttonState3,buttonState4,buttonState5;                // variable to hold the last button state


void setup() {
  // mode the pins
  pinMode(2,INPUT);
  pinMode(3,INPUT);
  pinMode(4,INPUT);
  pinMode(5,INPUT);
  pinMode(9,OUTPUT);
  pinMode(10,OUTPUT);
  pinMode(11,OUTPUT);
  pinMode(12,OUTPUT);
  // for showing the score
  Serial.begin(9600);
  Serial.println("+---------------------------------------------------------------+");
  Serial.println("|Welcome to ButtonHero!                                         |");
  Serial.println("|When a light lights up, press the corrisponding button.        |");
  Serial.println("|You lose points by being too slow or pressing the wrong button.|");
  Serial.println("|Press any button to start...                                   |");
  Serial.print("+---------------------------------------------------------------+");
}

void loop() {
  //
  if (digitalRead(2)==HIGH || digitalRead(3)==HIGH || digitalRead(4)==HIGH || digitalRead(5)==HIGH){
    started=true; //start the game if any button is pressed
  }
  if (started==true){
    if (needNewLed ==true){ //we need another LED
      digitalWrite(currentLed, LOW); // turn off the old one
      byte randomLed = random(9,13); // pick a random LED
      while(currentLed == randomLed){ //make sure it's not the same as the last one
        randomLed = random(9,13);
      }
      currentLed = randomLed;
      digitalWrite(currentLed, HIGH); //light up the new LED
      delay(100); //wait a little bit
      needNewLed = false;
    }

    val2 = digitalRead(2);      // read input value and store it in val
    val3 = digitalRead(3);      // read input value and store it in val
    val4 = digitalRead(4);      // read input value and store it in val
    val5 = digitalRead(5);      // read input value and store it in val

    if (val2 != buttonState2 && val2 == HIGH || val3 != buttonState3 && val3 == HIGH || val4 != buttonState4 && val4 == HIGH || val5 != buttonState5 && val5 == HIGH) {          // the button state has changed!
      if (currentLed == 9 && digitalRead(5) == HIGH){ // did they hit the right button?
        score++;
        needNewLed = true;
        ledDelay = 0;
        updateScreen=true;
      }
      else if (currentLed == 10 && digitalRead(4) == HIGH){ // did they hit the right button?
        score++;
        needNewLed = true;
        ledDelay = 0;
        updateScreen=true;
      }
      else if (currentLed == 11 && digitalRead(3) == HIGH){ // did they hit the right button?
        score++;
        needNewLed = true;
        ledDelay = 0;
        updateScreen=true;
      }
      else if (currentLed == 12 && digitalRead(2) == HIGH){ // did they hit the right button?
        score++;
        needNewLed = true;
        ledDelay = 0;
        updateScreen=true;
      }
      else if (digitalRead(2)==HIGH || digitalRead(3)==HIGH || digitalRead(4)==HIGH || digitalRead(5)==HIGH) { // did they hit the wrong button?
        loseHealth();
        lostHealth=true;
      }
    }
    else { // they didnt press anything
      ledDelay++;
      delay(1);
    }

    buttonState2 = val2;                 // save the new state in our variable
    buttonState3 = val3;                 // save the new state in our variable
    buttonState4 = val4;                 // save the new state in our variable
    buttonState5 = val5;                 // save the new state in our variable
   
    // did the LED reach the timeout threshold?
    if (score <= 10){
      if(ledDelay == 1000){
        loseHealth();
        lostHealth=true;
      }
    }
    else if (score <= 15){
      if(ledDelay == 800){
        loseHealth();
        lostHealth=true;
      }
    }
    else if (score <= 20){
      if(ledDelay == 600){
        loseHealth();
        lostHealth=true;
      }
    }
    else if (score <= 25){
      if(ledDelay == 400){
        loseHealth();
        lostHealth=true;
      }
    }
    else if (score <= 30){
      if(ledDelay == 200){
        loseHealth();
        lostHealth=true;
      }
    }
    else if (score > 30){
      if(ledDelay == (220-score)){
        loseHealth();
        lostHealth=true;
      }
    }
   
    // update the display
    if(updateScreen==true){
      Serial.println(' ');
      Serial.println("+---------------------------------------------------------------+");
      Serial.println("|                                                               |");
      Serial.print("| Score: ");
      Serial.print(score);
      if(score<10){
        Serial.println("                                                      |");
      }
      else if(score<100){
        Serial.println("                                                     |");
      }
      else if(score<1000){
        Serial.println("                                                    |");
      }

      if(health==6){
        health=5;
      }

      if(health==5){
        Serial.println("| Lives: <3 <3 <3 <3 <3                                         |");
        Serial.println("|                                                               |");
      }
      else if(health==4){
        Serial.println("| Lives: <3 <3 <3 <3                                            |");
        Serial.println("|                                                               |");
      }
      else if(health==3){
        Serial.println("| Lives: <3 <3 <3                                               |");
        Serial.println("|                                                               |");
      }
      else if(health==2){
        Serial.println("| Lives: <3 <3                                                  |");
        Serial.println("|                                                               |");
      }
      else if(health==1){
        Serial.println("| Lives: <3                                                     |");
        Serial.println("|                                                               |");
      }
      else if(health==0){
        Serial.println("| Lives:                                                        |");
        Serial.println("|                          YOU LOSE!                            |");
        health = 6;
        score = 0;
      }
      Serial.print("+---------------------------------------------------------------+");
      updateScreen=false;
    }
  }
  lostHealth=false;
}

// subtract one health
void loseHealth(){
  if(lostHealth==false){
    health--;
    updateScreen=true;
    needNewLed=true;
    ledDelay = 0;
    if(health <= 0){ // did they lose the game?
      started=false;
      updateScreen=true;
      // blink 3 times
      digitalWrite(9,HIGH);
      digitalWrite(10,HIGH);
      digitalWrite(11,HIGH);
      digitalWrite(12,HIGH);
      delay(200);
      digitalWrite(9,LOW);
      digitalWrite(10,LOW);
      digitalWrite(11,LOW);
      digitalWrite(12,LOW);
      delay(200);
      digitalWrite(9,HIGH);
      digitalWrite(10,HIGH);
      digitalWrite(11,HIGH);
      digitalWrite(12,HIGH);
      delay(200);
      digitalWrite(9,LOW);
      digitalWrite(10,LOW);
      digitalWrite(11,LOW);
      digitalWrite(12,LOW);
      delay(200);
      digitalWrite(9,HIGH);
      digitalWrite(10,HIGH);
      digitalWrite(11,HIGH);
      digitalWrite(12,HIGH);
      delay(200);
      digitalWrite(9,LOW);
      digitalWrite(10,LOW);
      digitalWrite(11,LOW);
      digitalWrite(12,LOW);
    }
  }
}

Step 4: Done!

Open the Serial Monitor (9600 baud) and resize it to be 6 lines high and wide enough so that the horizontal scrollbar disappears. 
Have fun!
botgames5 months ago

It works! First try! Thank you for the easy to follow instructable. I like being able to see where everything goes. The pictures were definitely helpful, since there wasn't a schematic to go by. I had to use different resistors cause I didn't have the ones you suggested. But other than that I didn't have any problems. Thanks again. Great job!

EpicWolverine (author)  botgames5 months ago

Thanks! If you were looking for the more traditional schematic, you can download the Fritzing file in Step 2 and switch the view to schematic. Fritzing is a great piece of circuit creation software and is available here: http://fritzing.org/home/

doug2.01 year ago
dude you totally copied this doug. i had this idea before you but you posted this first. youre a phony. A BIG FAT PHONY
jrockn1 doug2.06 months ago

you're just lazy

doug2.01 year ago
ARDUINO DOUGSTER 123456789
Biggimac2 years ago
I noticed that you used random insted of true random. If you use the "normal" random it will use the same sequence. Therefor it is not really random. Thankfully on the arduino site you can get the true random! Great idea.
the_ice_man2 years ago
Great work !!
How come you didnt hade debouncing or interrupts ???
maewert2 years ago
Nice 'ible!
One suggestion to make it easier is to eliminate the 8k2 resistors and the 560 ohm resistors by using the arduino's internal pull-up resistors on the input pins and wire the buttons to ground when pressed instead of 5v (and change the SW appropriately). Saves 8 resistors.

Best Wishes