/ / / / / / / / / / /_/ / / / / _ / / _/ / / / / / _ / / / /_/ / _ / / / _ / / /_/ /_/ /_/ _ /_/ _/ \ / /_/ /_/ /_/ _ /_/ _/ MARK ESSEN, 2011 */

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1 /* / / / / / / / / / / /_/ / / / / _ / / _/ / / / / / _ / / / /_/ / _ / / / _ / / /_/ /_/ /_/ _ /_/ _/ \ / /_/ /_/ /_/ _ /_/ _/ MARK ESSEN, 2011 */ DESCRIPTION Play a game of hangman. Flip the ANALOG boolean to switch from analog to digital (uses the same shield, just swap the plugs appropriately) Analog: Dial to pick a letter, left button to input it as a guess. Game will respond with new game state (guessed word and limbs left) Press the right button to check the game state (during the pick a letter phase) Digital: Hit the choose button at varying lengths to pick letters through morse code. Lights and sounds indicate whether it was correct, incorrect, or an error read. Press the query button to check on the status of the word and your remaining limbs. ARDUINO CODE #include <Servo.h> //include servo library

2 // PIN STUFF const int choosebuttonpin = 0; //store the choose button pin # (analog) const int querybuttonpin = 3; //store the choose button pin # (analog) //NEEDS CONNECTION const int pointerservopin = 9; //store the pointer servo pin # (digital) const int knobpin = 2; //store the pressure pin # (analog) const int debugled = 13; //store the built in LED pin # (digital) Servo pointerservo; // create servo object to control a servo const int servomessagewaittotal = 100; //delay so you don't send too many signals to the servo int servomessagedelay = 0; //delay counter //leds const int yellowled = 10; const int redled = 11; const int greenled = 12; //sounds const int tonepin = 8; const int blanksound = 150; const int symbolsound = 30; const int limbsound = 300; const int correct = 0; const int incorrect = 1; const int error = 2; const int wingame = 3; const int start = 4; const int showprogress = 5; const int losegame = 6; const int showlives = 7; //morse const int dotlength = 25; const int inputdotlength = 25 * 6; const int waittimebetweencharacters = 100; const int userinputtimeup = 1000; String chosenletterinmorse; boolean senddataflag = false; boolean acceptinput = false; // GAME STUFF int limbs; //how many limbs you have left String secretword; //the word you're guessing String guessedword; //what you've guessed so far boolean ANALOG = false; int choosebuttonpressedlength; int choosebuttonnotpressedlength; boolean somedatainput = false; String chosenletter = ""; // WORD STUFF const int wordbanksize=12; String wordbank[wordbanksize] = "fiber","fatal","tutor","euros","tapes", "front","skirt","stats","scare","model", "nudes","nerds"; String alphabet = "9abcdefghijklmnopqrstuvwxyz_012345"; int base_three_alphabet[34]; void setup()

3 Serial.begin(9600); //start serial communication pinmode(debugled, OUTPUT); //connect the built in arduino LED for debug stuff if(analog) pointerservo.attach(pointerservopin); // attaches the servo pin to the servo object pinmode(yellowled,output); pinmode(redled,output); pinmode(greenled,output); pinmode(tonepin,output); pinmode(choosebuttonpin, INPUT); //connect the chooser pushbutton pinmode(querybuttonpin, INPUT); //connect the query pushbutton int i; for(i=0; i<34; i+=1) Serial.println(String(i)); String morse_string = get_morse_string_from_char(alphabet.charat(i)); Serial.println(morse_string); base_three_alphabet[i] = morse_string_to_base_three(morse_string); randomseed(analogread(1)); reset_game(); //reset game variables //reset game variables void reset_game() limbs = 5; //5 limbs to lose Serial.println("Hangman by Mark Essen, 2011"); Serial.println("it's time to play some hangman!"); secretword = get_random_word(); //arduino picks a word for user to guess guessedword = " "; //reset the correctly guessed letters //show_progress();//show how many limbs left and the letters guessed correctly choosebuttonpressedlength = 0; choosebuttonnotpressedlength = 0; chosenletterinmorse = ""; digitalwrite(redled,low); digitalwrite(yellowled,low); digitalwrite(greenled,low); acceptinput = false; clear_input_data(); play_melody(start); //game loop void loop() acceptinput = true; if(query_button_pressed()) show_progress(); if(analog) chosenletter = get_letter_from_knob(); point_dial_to_letter(chosenletter);

4 senddataflag = false; if(acceptinput) update_input_data(); if( (ANALOG && choose_button_pressed() ) senddataflag) Serial.println("you guessed " + chosenletter); if(is_letter_in_secret_word(chosenletter)) reveal_letter_in_guessed_word(chosenletter); if(!analog) flash_correct(); if(!analog) flash_incorrect(); Serial.println(chosenLetter+" was not in the word!"); lose_a_limb(); delay(100); if(check_lose_state()) play_melody(losegame); delay(900); reset_game(); clear_input_data(); if(check_win_state()) play_melody(wingame); delay(100); flash_message(greenled,guessedword,900); delay(200); flash_message(greenled,guessedword,900); delay(200); flash_message(greenled,guessedword,900); delay(900); reset_game(); void clear_input_data() somedatainput = false; senddataflag = false; choosebuttonnotpressedlength = 0; choosebuttonpressedlength = 0; chosenletterinmorse=""; chosenletter = ""; void play_melody(int track) switch(track) case start: int i; for(i=0; i<10; i+=1)

5 delay(20); int LED = redled; if(random(30)<20) if(random(10)<5) LED = greenled; LED = yellowled; play_long(random(1000),100,led); case correct: play_long(350,200,greenled); delay(75); play_long(500,100,greenled); delay(50); play_long(575,150,greenled); case showprogress: digitalwrite(yellowled,high); digitalwrite(redled,high); play_long(900,300,greenled); digitalwrite(yellowled,low); digitalwrite(redled,low); delay(75); digitalwrite(yellowled,high); digitalwrite(redled,high); play_long(900,700,greenled); digitalwrite(yellowled,low); digitalwrite(redled,low); case showlives: digitalwrite(yellowled,high); digitalwrite(redled,high); play_long(1000,150,greenled); digitalwrite(yellowled,low); digitalwrite(redled,low); delay(75); digitalwrite(yellowled,high); digitalwrite(redled,high); play_long(1000,200,greenled); digitalwrite(yellowled,low); digitalwrite(redled,low); case wingame: play_sweep(500,1000,500,greenled); delay(75); play_sweep(600,1100,500,greenled); delay(75); play_sweep(700,1200,500,greenled); delay(200); play_sweep(2000,1000,300,greenled); delay(200); play_sweep(2000,1000,300,greenled); delay(200); play_sweep(2000,1000,300,greenled); case losegame:

6 play_long(100,200,redled); delay(75); play_long(50,1200,redled); delay(75); play_long(25,2000,redled); case incorrect: play_long(200,200,redled); delay(75); play_long(25,1200,redled); case error: play_long(20,1200,yellowled); void play_long(int hz, int length, int LED) turn_on_led_and_note(led,hz); delay(length); turn_off_led_and_note(led); void play_sweep(int sweepstart, int sweepend, int sweeplength, int LED) int i = sweepstart; boolean up = true; if(sweepstart>sweepend) up = false; i = sweepend; boolean done = false; while(!done) turn_on_led_and_note(led,i); int freqdiff = abs(sweepstart - sweepend); delay( sweeplength / freqdiff); if(up) i+=1; if(i>=sweepend) done = true; i-=1; if(i<=sweepstart) done =true; turn_off_led_and_note(led); ///////////////////////////////////////////////////////////////////////////////////////////////// /////////////// void update_input_data() if(choose_button_pressed()) choosebuttonpressedlength+=1;

7 choosebuttonnotpressedlength = 0; somedatainput = true; turn_on_led_and_note(yellowled,symbolsound); choosebuttonnotpressedlength+=1; if(choosebuttonnotpressedlength==1) turn_off_led_and_note(yellowled); if(choosebuttonpressedlength > 0) String c = ""; if(choosebuttonpressedlength < inputdotlength) c = "."; c = "-"; chosenletterinmorse += c; Serial.println("added " + c + " to " + chosenletterinmorse); if(choosebuttonnotpressedlength > waittimebetweencharacters * 10 && somedatainput ) senddataflag = true; choosebuttonpressedlength = 0; if(senddataflag) chosenletter = get_letter_from_morse_string(chosenletterinmorse); ///////////////////////////////////////////////////////////////////////////////////////////////// ///////////// String get_letter_from_morse_string(string morse) int base_three_string = morse_string_to_base_three(morse); String letter = "error"; int i; for(i=1; i<27; i+=1) if(base_three_alphabet[i] == base_three_string) letter = alphabet.charat(i); if(letter.equals("error")) Serial.println("error finding letter in lookup table"); play_melody(error); clear_input_data(); return ""; return letter; void flash_correct() Serial.println("correct!");

8 play_melody(correct); //flash_message(greenled,"s",0); void flash_incorrect() Serial.println("incorrect!"); play_melody(incorrect); //flash_message(redled,"o",0); String get_random_word() String randomword = wordbank[round(random(wordbanksize))]; //grab a random word from //the wordbank //randomword = "zzaae"; Serial.println(">>the secret word is " + randomword); return randomword; boolean is_letter_in_secret_word(string chosenletter) String secretchecker = secretword.replace(chosenletter,"@"); //turns all instances of the //chosen letter into garbage if(secretchecker.equals(secretword)) //checks for garbage return false; return true; void reveal_letter_in_guessed_word(string revealedletter) boolean charstoreplace[5];//word length array of flags for replacing letters int i; for(i=0; i<5; i+=1)//loop through charstoreplace flag array charstoreplace[i]=false; //set all flags to false for(i=0; i<5; i+=1)//loop through secret word String nthchar = secretword.charat(i);//look at nth char if(nthchar.equals(revealedletter)) //see if it's the one chosen charstoreplace[i]=1; //flag the position for replacement in the guessed word for(i=0; i<5; i+=1)//loop through guessed word if(charstoreplace[i])//see if the position is flagged guessedword.setcharat(i,revealedletter.charat(0)); //replace it with the revealed letter // Serial.println(revealedLetter + " was in the word!"); void lose_a_limb() limbs-=1; //hack off a limb Serial.println("lost a limb!"); void point_dial_to_letter(string indicatedletter)

9 int val = alphabet.indexof(indicatedletter); //find the position of the //letter in the alphabet //Serial.println("found character at alphabet array index " + String(val)); val = map(val,0, 31, 179, 25);// scale it to use it with the servo // (value between 0 and 180) servomessagedelay+=1; if(servomessagedelay > servomessagewaittotal)//if we've waited long enough for the //servo to deal with the last message pointerservo.write(val); //tell the servo where to point servomessagedelay = 0; //reset the servo message delay String get_letter_from_knob() int val = analogread(knobpin); // read the value from the sensor val = round(map(val,0,1023,1,26)); String letter = String(alphabet.charAt(val)); // map it to the // alphabet string //if(!letter.equals(previouspressureletter))serial.println("picking... "+letter); //previouspressureletter=letter; return letter; boolean choose_button_pressed() if(analogread(choosebuttonpin) > 1023 / 2) return true; return false; boolean query_button_pressed() if(analogread(querybuttonpin) > 1023 / 2) return true; return false; void show_progress() acceptinput = false; if(analog) show_progress_analog(); show_progress_digital(); void show_progress_digital() play_melody(showprogress); Serial.println("so far you have guessed " + guessedword); flash_message(redled,guessedword,0); delay(200); play_melody(showlives); flash_message(yellowled,string(limbs),limbsound); delay(200); //digitalwrite(greenled,high);

10 void flash_message(int LED, String message, int note) Serial.println("flashing " + message); String morsestring; int i, w, n; n = symbolsound; if(note!=0) n = note; for(i=0; i< message.length(); i+=1) morsestring = get_morse_string_from_char( message.charat(i) ); if(morsestring.equals("")) flash_pin_symbol_tone(yellowled,'-',blanksound); for(w=0; w< morsestring.length(); w+=1) flash_pin_symbol_tone(greenled,morsestring.charat(w),n); delay(waittimebetweencharacters); Serial.println("done flashing"); void flash_pin_symbol_tone(int LED, char c, int note) int length; length = 0; if(c=='-') length = dotlength*3; if(c=='.') length = dotlength; if(length>0) turn_on_led_and_note(led,note); delay(length); turn_off_led_and_note(led); delay(waittimebetweencharacters); void turn_on_led_and_note(int LED, int note) digitalwrite(led,high); tone(tonepin,note); void turn_off_led_and_note(int LED) digitalwrite(led,low); notone(tonepin); String get_morse_string_from_char(char letter) String morse; switch(letter)

11 case 'a': morse = ".- "; case 'b': morse = "-... "; case 'c': morse = "-.-. "; case 'd': morse = "-.. "; case 'e': morse = ". "; case 'f': morse = "..-. "; case 'g': morse = "--. "; case 'h': morse = "... "; case 'i': morse = ".. "; case 'j': morse = ".--- "; case 'k': morse = "-.- "; case 'l': morse = ".-.. "; case 'm': morse = "-- "; case 'n': morse = "-. "; case 'o': morse = "--- "; case 'p': morse = ".--. "; case 'q': morse = "--.- "; case 'r': morse = ".-. "; case 's': morse = "... "; case 't': morse = "- "; case 'u': morse = "..- ";

12 case 'v': morse = "...- "; case 'w': morse = ".-- "; case 'x': morse = "-..- "; case 'y': morse = "-.-- "; case 'z': morse = "--.. "; case '0': morse = "-----"; case '1': morse = ".----"; case '2': morse = "..---"; case '3': morse = "...--"; case '4': morse = "...-"; case '5': morse = "..."; case '_': morse = ""; case '9': morse = "...--"; default: morse = "..."; Serial.println("error, no morse found for char "+String(letter)); return morse; int morse_string_to_base_three(string morse) int i; int base_three = 0; for(i=0; i<5; i+=1) if(morse.charat(i)=='.') base_three += 1 * pow(3,i); if(morse.charat(i)=='-') base_three += 2 * pow(3,i);

13 if(morse.charat(i)== ' ') base_three += 0 * pow(3,i); Serial.println("generated base three int of "+String(base_three)); return base_three; void wait() delay(100); void show_progress_analog() Serial.println("so far you have guessed " + guessedword); int i; int timestamp; long wait = 10000; for(i=0; i<5; i+=1) String let; let = String(guessedWord.charAt(i)); Serial.println(String(i) + "st char is " + let); timestamp = 0; while(timestamp<wait) point_dial_to_letter("9"); //clear timestamp+=1; timestamp =0; while(timestamp<wait) point_dial_to_letter(let); timestamp+=1; Serial.println("you have " + String(limbs) + " limb(s) remaining..."); timestamp = 0; while(timestamp<wait) point_dial_to_letter("9"); //clear timestamp+=1; timestamp = 0; while(timestamp<wait) point_dial_to_letter(string(limbs)); //set timestamp+=1; boolean check_win_state() if(guessedword.equals(secretword)) Serial.println("you win! \n\n"); return true; return false;

14 boolean check_lose_state() if(limbs<1) Serial.println("game over!"); return true; return false; SOLDERING

15 SCHEMATIC MATERIALS laser cut job $7 arduino shield - $5

16 usb male>female $2 422 servo + housing $25 total: $39ish everything I had: wire, arcade buttons, 10k pot, resistors, usb cable + ac plug, wood, plexi, screw, glue...