BirthdayCard
- Components Used: LEDs, photocell, piezo speaker
- Description:
Photocell detects the light density so that it tells that whether the card is open or not. When the card is open, it plays birthdaysong and blinks candles in a card. This birthdaycard can be for either 3-year-old kid or 30-year-old guy!
- Arduino Code: I modified few things from piezo speaker example code. key b to b flat, and put LED blinking part into the playing song part so that they happen simultaneously, while it keeps checking whether the card is open or not.
int color[] = { 9,10,11};
int Photocell = 1;
int speakerOut = 7;
byte names[] = {
'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C'};
int tones[] = {
1915, 1700, 1519, 1432, 1275, 1136, 1090, 956}; //changed b value to b flat
byte melody[] = "2c2c4d4c5f9e2c2c4d4c5g9f2c2c6C6a5f5e8d3b2b6a5f5g9f";
int count = 0;
int count2 = 0;
int count3 = 0;
int MAX_COUNT = 30;
int statePin = LOW;
int i =0; //LED
uint8_t cardOpen = 0;
void setup() {
for (int i = 0; i<=2; i++){
pinMode(color[i], OUTPUT);
}
pinMode(speakerOut, OUTPUT);
pinMode(Photocell, INPUT);
Serial.begin(115200);
}
void loop() {
checkSensor();
if (cardOpen) {
song();
checkSensor();
}
}
void checkSensor (){
if(analogRead(Photocell) > 300){
cardOpen = 1;
// Serial.println("Opened.");
}
else {
cardOpen = 0;
//Serial.println("Closed.");
}
}
void song() {
digitalWrite(speakerOut, LOW);
for (count = 0; count < MAX_COUNT; count++) {
checkSensor();
if(cardOpen == 0){
break;
}
statePin = !statePin;
i = count%3;
analogWrite(color[i], 255);
delay(20);
checkSensor();
if(cardOpen == 0){
break;
}
for (count3 = 0; count3 <= (melody[count*2] - 48) * 30; count3++) {
for (count2=0;count2<8;count2++) {
if (names[count2] == melody[count*2 + 1]) {
digitalWrite(speakerOut,HIGH);
delayMicroseconds(tones[count2]);
digitalWrite(speakerOut, LOW);
delayMicroseconds(tones[count2]);
}
}
analogWrite(color[i], 0);
}
}
}
