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Nel video impareremo a realizzare un progetto natalizio con LED lampeggianti, canzoni di Natale riprodotte con il buzzer, il potenziometro per regolare il volume, il display LCD per mostrare la canzone attuale e dei pulsanti per accendere il programma e cambiare le canzoni.
#include <RtttlPlayer.h>#include <LiquidCrystal_I2C.h> #define ENABLE_PIN 3#define CHANGE_PIN 2#define DEBOUNCE_DELAY 50#define LED_DELAY 200#define BUZZER_PIN 4#define BACKLIGHT_PIN 5 int enableState = LOW;int enableLastReading = LOW;unsigned long enableTimestamp = 0;bool enable = false;int changeState = LOW;int changeLastReading = LOW;unsigned long changeTimestamp = 0;char *songs[] = { "We Wish You a |Merry Christmas:d=4,o=5,b=170:d,g,8g,8a,8g,8f#,e,e,e,a,8a,8b,8a,8g,f#,d,d,b,8b,8c6,8b,8a,g,e,d,e,a,f#,2g,d,g,8g,8a,8g,8f#,e,e,e,a,8a,8b,8a,8g,f#,d,d,b,8b,8c6,8b,8a,g,e,d,e,a,f#,1g,d,g,g,g,2f#,f#,g,f#,e,2d,a,b,8a,8a,8g,8g,d6,d,d,e,a,f#,2g,1p", "Jingle Bells:d=4,o=5,b=170:b,b,b,p,b,b,b,p,b,d6,2g.,8a,2b.,8p,c6,c6,c6.,8c6,c6,b,b,8b,8b,b,a,a,b,2a,2d6,1p", "Silent Night:d=4,o=4,b=125:f#.,8g#,f#,d#.,p.,f#.,8g#,f#,d#.,p.,2c#6,c#6,a#.,p.,2b,b,f#.,p.,2g#,g#,b.,8a#,g#,f#.,8g#,f#,d#.,p.,2g#,g#,b.,8a#,g#,f#.,8g#,f#,d#.,p.,2c#6,c#6,e.6,8c#6,a#,2b.,2d#6,p.,b,f#,d#,f#.,8e,c#,b.4,1p", "Let it Snow:d=4,o=5,b=125:8c,8c,8c6,8c6,a#,a,g,f,2c,8c,16c,g.,8f,g.,8f,e,2c,d,8d6,8d6,c6,a#,a,2g.,8e.6,16d6,c6,8c.6,16a#,a,8a#.,16a,2f.,c,8c6,8c6,a#,a,g,f,2c,8c.,16c,g.,8f,g.,8f,e,2c,d,8d6,8d6,c6,a#,a,2g.,8e.6,16d6,c6,8c.6,16a#,a,8a.,16g,2f.1p"};int songsNumber = sizeof(songs)/sizeof(char *);int songIndex = 0;bool songChanged = true;int led[] = { 12, 11, 10, 9, 8 };unsigned long ledTimestamp = 0; RtttlPlayer player(BUZZER_PIN);LiquidCrystal_I2C lcd(0x3f, 16, 2); void setup(){ pinMode(ENABLE_PIN, INPUT); pinMode(CHANGE_PIN, INPUT); for(int i = 0; i < 5; i++){ pinMode(led[i], OUTPUT); } randomSeed(analogRead(A0)); lcd.init(); lcd.backlight(); lcd.clear(); pinMode(BACKLIGHT_PIN, OUTPUT);} void loop(){ int enableInput = digitalRead(ENABLE_PIN); if(enableInput != enableLastReading){ enableTimestamp = millis(); } if((millis() - enableTimestamp) > DEBOUNCE_DELAY){ if(enableInput != enableState && enableInput == HIGH){ enable = !enable; songIndex = 0; songChanged = true; for(int i = 0; i < 5; i++){ digitalWrite(led[i], LOW); } lcd.clear(); analogWrite(BACKLIGHT_PIN, 0); } enableState = enableInput; } enableLastReading = enableInput; if(!enable){ return; } int changeInput = digitalRead(CHANGE_PIN); if(changeInput != changeLastReading){ changeTimestamp = millis(); } if((millis() - changeTimestamp) > DEBOUNCE_DELAY){ if(changeInput != changeState && changeInput == HIGH){ songIndex = ++songIndex % songsNumber; songChanged = true; } changeState = changeInput; } changeLastReading = changeInput; if((millis() - ledTimestamp) > LED_DELAY){ int randomNumber = random(0, 31); for(int i = 0; i < 5; i++){ digitalWrite(led[i], randomNumber & 1); randomNumber >>= 1; } ledTimestamp = millis(); } if(songChanged){ player.play(songs[songIndex]); songChanged = false; lcd.clear(); analogWrite(BACKLIGHT_PIN, 10); String songTitle = player.getSongTitle(); int songTitleLength = songTitle.length(); int row = 0; int column = 0; for(int i = 0; i < songTitleLength; i++){ if(songTitle[i] != '|'){ lcd.setCursor(column, row); lcd.print(songTitle[i]); column++; }else{ row++; column = 0; } } }else{ if(player.isPlaying()){ player.update(); }else{ songIndex = ++songIndex % songsNumber; songChanged = true; } } delay(1);}In qualità di Affiliato Amazon riceviamo un guadagno dagli acquisti idonei
