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Experimental Pong On A Led-strip

Made by j-stokke / Displays / Games & Gaming / Retro Tech

About the project

Pong playing on a primitive 17x17 screen made with a 5 m WS2812 LED strip.

Project info

Difficulty: Moderate

Platforms: Arduino, NeoPixel

Estimated time: 2 weeks

License: Creative Commons Attribution-NonCommercial CC BY-NC version 4.0 or later (CC BY-NC 4+)

Items used in this project

Hardware components

	Arduino Uno - R3 SMD	x 1
	Mean Well LED Switching Power Supply - 5VDC, 8A	x 1

Hand tools and fabrication machines

Soldering iron

x 1

Story

I made a primitive 17x17 screen from a 5 meter ws2812 LED strip. Originally i just wanted to make cool light displays on it but figured it would be a fun exercise to try and make a Pong game for it. Since the direction of the columns alternate it was a bit tricky to get the ball to move across them correctly. I could have used longer wired to connect them, allowing them all to be placed in the same direction, but where's the fun in that? The backing of the screen is made from a piece of drywall with duct tape to keep it from crumbling.

Code

#include <Adafruit_NeoPixel.h>
#define LED_PIN 6
#define LED_COUNT 17*17
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);

int ledNum;
int rad;
int counter;

int rightPaddle;
int leftPaddle;

unsigned long ballPos = LED_COUNT/2;
int ballMovement = 17;
int ballLight;

int potValX;
int potValY;
int potPinX = A5;
int potPinY = A4;

int restartButton = 13;
int restart;
unsigned long startBlinkCounter = 0;

unsigned long previousTime = 0;
unsigned long interval = 70;
unsigned long blinkInterval = 100;

void setup() {
pixels.begin();
pinMode(potPinX,INPUT);
pinMode(potPinY,INPUT);
pinMode(restartButton,INPUT);
Serial.begin(9600);
}

void loop() {
unsigned long currentTime = millis();

potValX = analogRead(potPinX);
potValY = analogRead(potPinY);

rightPaddle = map(potValX, 0, 1023, 1, 15);
leftPaddle = map(potValY, 0, 1023, LED_COUNT-16, LED_COUNT-2);

restart = digitalRead(restartButton);

if (currentTime-previousTime>interval){
  previousTime = currentTime;
  ballPos=ballPos+ballMovement;
  }

//Bollen
if(ballPos == leftPaddle-17){
  ballMovement = -17;
  }
if(ballPos == leftPaddle-16){
  ballMovement = -16;
  }
if(ballPos == leftPaddle-18){
  ballMovement = -18;
  }
if(ballPos == rightPaddle+17){
  ballMovement = 17;
  }
if(ballPos == rightPaddle+16){
  ballMovement = 16;
  }
if(ballPos == rightPaddle+18){
  ballMovement = 18;
  }

if(ballPos%17 == 16 && ballMovement == 18){
  ballMovement = 16;
  }
if(ballPos%17 == 16 && ballMovement == -16){
  ballMovement = -18;
  }
if(ballPos%17 == 0 && ballMovement == -18){
  ballMovement = -16;
  }
if(ballPos%17 == 0 && ballMovement == 16){
  ballMovement = 18;
  }

//Vänder varannan kolumn 
rad = 1;
for(counter=0; counter<=ballPos; counter++){
  if (counter%17 == 0 && counter != 0){
    rad++;
    }}

if(rad%2 == 0){
  ballLight = (17*rad + ((rad-1)*17)-counter);
  }
else{
  ballLight = ballPos;
}

// Game over
if (ballLight<17 || ballLight>LED_COUNT-17){
  while (restart == 0){
    restart = digitalRead(restartButton);
    if (restart == 1){
      ballPos = LED_COUNT/2;
      ballMovement = 17;
      startBlinkCounter = currentTime;
    }
    for(ledNum=0; ledNum < LED_COUNT; ledNum++){
      if(ledNum<17 && ballLight<17 || ledNum>LED_COUNT-17 && ballLight>LED_COUNT-17){
        pixels.setPixelColor(ledNum, pixels.Color(5, 0, 0));
      }
      else if(ledNum>=17 && ledNum<=33 && ballLight<17 || ledNum<=LED_COUNT-17 && ledNum>=LED_COUNT-34 && ballLight>LED_COUNT-17){
        pixels.setPixelColor(ledNum, pixels.Color(1, 0, 0));
      }
    }
    pixels.show();
    delay(500);
    for(ledNum=0; ledNum < LED_COUNT; ledNum++){
      pixels.setPixelColor(ledNum, pixels.Color(0, 0, 0));
    }
    pixels.show();
    delay(500);
    }
}

//Räkna genom LED, tänd/släck boll + racket
for(ledNum=0; ledNum < LED_COUNT; ledNum++){
  if(ledNum==ballLight || ledNum==leftPaddle || ledNum==leftPaddle-1 || ledNum==leftPaddle+1 || ledNum==rightPaddle || ledNum==rightPaddle-1 || ledNum==rightPaddle+1){
    pixels.setPixelColor(ledNum, pixels.Color(0, 0, 10));
    }

  else{
    pixels.setPixelColor(ledNum, pixels.Color(0, 0, 0));
    }

}
pixels.show();

}

Credits

j-stokke

Motion designer, kind of obsessed with exploring and tinkering with all kinds of projects, from animation, coding, experimenting with projecting and interaction to welding, boat works, building machines, furniture etc. Mostly into the experimentation, testing, seeing what will happen phase, and have a tendency to get bored with packaging and actually making a nice presentation for projects.

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Experimental Pong On A Led-strip

About the project

Project info