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Arduino Pong

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Play pong on a little LCD screen with two big joysticks.

Pong made chucky-cheese's more than just a deranged mouse-filled funhouse. Now we can play it with an Arduino, LCD screen, and joysticks. We use the nice thumb joysticks from Sparkfun, we like them because they come with a push-button. The screen is the rich TFT LCD Screen available at Adafruit . The logic is simple: each joystick (y-axis) controls a paddle. The ball bounces from side to side of the screen. If it gets pass a paddle the other side wins. One of our LCD Pong PCBs has LED's to represent the score. The newer PCB has a piezo buzzer and a vibration motor, instead of the LEDs. You can tell that one by the Islamic mosaic pattern silkscreened on its front. You can download that silkscreen and a bunch more to put on your boards at our EAGLE bitmap tutorial .

Images

Plexi Enclosure

Plexi Enclosure

The LCD pong board has a strong plexiglass enclosure. Two laser cut circular holes give access to the joysticks. Notice the hand silkscreened under the left joystick. This board is being powered by usb but it also works from a battery.
LCD Pong

Uses USB or battery power. The LEDs keep score.
PCB Backside

Notice the atmega168 mcu, the SD card USB interfaces. (USB is for power only.) The other big chip is the cd4050 level shifter. This gives the SD card and the TFT LCD screen the 3.3V they desire from the 5 volts running the atmega. Also notice the cut out in the plexi glass enclosure exposing the 6 pins of the ISP. With those pins exposed you can attach an USBTiny or an MKII and re-program the LCD Pong to play any game you can dream up!
The Back of the LCD Pong PCB

Check out all the circuitry protected by the plexi-glass. Notice there is a hole letting out ISP pins so you can reprogram the board to make it play all kinds of games!
LCD Pong

LCD Pong with Islamic art silkscreened!
LCD Pong Arduino Gaming System

See the gadget from the side.
Pong Glove

Wearable gaming! This pong game is so compact you can velcro it right onto a glove. Play games and keep your hand warm!
Schematic

The electrical schematic for the LCD Arduino Pong board. This is a picture of .sch EAGLE schematic file.

The LCD pong board has a strong plexiglass enclosure. Two laser cut circular holes give access to the joysticks. Notice the hand silkscreened under the left joystick. This board is being powered by usb but it also works from a battery.

Video

Watch a pong came in double speed. The red and green LEDs keep score. You can play your left hand vs. your right hand or against your friends, enemies, and frenemies.

Code

LCD Pong Arduino code

This code lets you control a tft LCD screen and two joysticks so you can play pong! It uses the ST7735 TFT LCD Screen library from adafruit (click the zip button to download the whole library. And we also use the Arduino SPI library to communicate with the TFT LCD Screen .

Download File

// Pins SCLK and MOSI are fixed in hardware, and pin 10 (or 53) // must be an output//#define sclk 13    // for MEGAs use pin 52//#define mosi 11    // for MEGAs use pin 51#define cs 10   // for MEGAs you probably want this to be pin 53#define dc 9#define rst 8  // you can also connect this to the Arduino reset// Color definitions#defineBLACK           0x0000#defineBLUE            0x001F#defineRED             0xF800#defineGREEN           0x07E0#define CYAN            0x07FF#define MAGENTA         0xF81F#define YELLOW          0xFFE0  #define WHITE           0xFFFF#include #include // Option 1: use any pins but a little slower//ST7735 tft = ST7735(cs, dc, mosi, sclk, rst);  // Option 2: must use the hardware SPI pins // (for UNO thats sclk = 13 and sid = 11) and pin 10 must be // an output. This is much faster - also required if you want// to use the microSD card (see the image drawing example)ST7735 tft = ST7735(cs, dc, rst);float p = 3.141592; // value for piint tft_width = 128;int tft_height = 160;int x1 = 60;int y1 = 60;int x2 = 20;int y2 = 80;int ballx = 60;int bally = 60;int deltay = 1;int deltax = 1;int ball_speed = 24;int left_score = 4;int right_score = 4;int background_color = 0x00;void setup(void) {  tft.initR();               // initialize a ST7735R chip  tft.writecommand(ST7735_DISPON);  tft.fillScreen(background_color);  delay(700);  for(int i = 0; i < 9; i++){    pinMode(i,OUTPUT);  }  for(int i = 0; i < 9; i++){    digitalWrite(i,HIGH);  }  delay(500);  }void loop() {    for(int i = 0; i < left_score; i++){    digitalWrite(i,HIGH);  }  for(int i = 0; i < right_score; i++){    digitalWrite(i+4,HIGH);  }  int cur_r = random(20,32);  int cur_g = random(55,64);  int cur_b = random(10,32);  int color = cur_r  | (cur_g << 5) | (cur_b << 11);   int radius = 4;  draw_paddles();  draw_ball(color);  delay(ball_speed);}void draw_input_text(){   int cur_x2 =  analogRead(2);  int cur_y2 =  analogRead(3);    String xs = String(cur_x2);  String ys = String(cur_y2);  char cx[4];  cx[0] = xs.charAt(0);  cx[1] = xs.charAt(1);  cx[2] = xs.charAt(2);  cx[3] =0;  char cy[4];  cy[0] = ys.charAt(0);  cy[1] = ys.charAt(1);  cy[2] = ys.charAt(2);  cy[3] =0;  tft.fillRect(10,20,40,40,background_color);  tft.drawString(12,22,cx ,YELLOW);  tft.drawString(12,40,cy ,YELLOW);}void draw_paddles(){  int cur_x =  analogRead(0);  int cur_y =  analogRead(1);    int hval = 620;  int lval = 350;   if ( y1 < tft_height - 20  && cur_y > hval) y1++;  else if ( y1 > 0 && cur_y < lval ) y1--;    int cur_x2 =  analogRead(2);  int cur_y2 =  analogRead(3);   if ( y2 < tft_height - 20 && cur_y2 > hval ) y2++;  else if (y2 > 0 && cur_y2 < lval ) y2--;   tft.fillRect(2, y1-3, 5, 27, background_color);  tft.fillRect(3, y1, 3, 20, YELLOW);  tft.fillRect(tft_width-3, y2-3, 5, 27,background_color);  tft.fillRect(tft_width-3, y2, 3, 20, YELLOW);}void draw_ball(int color){   int bradius = 6;    tft.fillCircle(ballx, bally, bradius , color);    ballx += deltax;    bally += deltay;    if ( ballx < 7 && bally > y1 && bally < y1+20) deltax *= -1;    else if ( ballx > tft_width-7 && bally > y2 && bally < y2+20) deltax *= -1;    else if ( bally <= bradius || bally >= tft_height - bradius ) deltay *= -1;    if (ballx <=  0 ) {      left_score--;      tft.drawString(2,42, "Right Won!" ,~background_color,2);      tft.drawString(2,62, "Get Ready!" ,CYAN,2);      for (int i = 0; i <250; i++){        delay(10);        draw_paddles();      }      int cur_r = random(0,26);      int cur_g = random(0,30);      int cur_b = random(0,18);      background_color = cur_r  | (cur_g << 5) | (cur_b << 11);       tft.fillScreen(background_color);      ballx = 64;      bally = 80;      if (ball_speed > 1) ball_speed--;      digitalWrite(left_score,LOW);    } else if (ballx >= tft_width  ) {      right_score --;      tft.drawString(2,42, "Left Won!" ,YELLOW,2);      tft.drawString(2,62, "Get Ready!" ,GREEN,2);      for (int i = 0; i <250; i++){        delay(10);        draw_paddles();      }      int cur_r = random(0,26);      int cur_g = random(0,30);      int cur_b = random(0,18);      background_color = cur_r  | (cur_g << 5) | (cur_b << 11);       tft.fillScreen(background_color);      ballx = 64;      bally = 80;      if (ball_speed > 1) ball_speed--;      digitalWrite(4+right_score,LOW);    }}

Parts

parts

Parts

Title	Description	#	Cost	Link	Picture
LCD and joystick PCB	This PCB holds two joysticks and an LCD display.	1	$10.0	Link
TFT LCD Screen	1.8 inch 160 x 128 pixels LCD screen. ST7735R driver. JDT-1800.	1	$9.95	Link
Joystick	Thumb joystick with push button.	2	$3.95	Link
ATMEGA328P-AU	Integrated Circuits (ICs) MCU AVR 32K FLASH 32TQFPValue:1.8 V ~ 5.5 V 20MHz	1	$3.05	Link
Crystal	CRYSTAL 16.00000 MHZ 20PF SMDValue:16MHz	1	$0.53	Link
Voltage Regulator 3v3 SMD	IC REG LDO 3.3V .15A SOT23 Up to 6V input output 3.3V 150mA (Max)Value:3.3V	1	$0.46	Link
CD4050	IC BUFF/CONVERTER HEX 16SOICN 8mA, 48mAValue: 3 V ~ 18 V	1	$0.45	Link