Introduction: The Light Sensor
This project is a light sensor has the objective to play the Mario song when any kind of light hit the top of the arduino box.
The video https://www.youtube.com/watch?v=cQL9tyPUkjgit is not exactly like the arduino that we want to make but is a little bit similar. That one from the video it is not a light sensor it only plays the music, but i think you already got the idea of the project.
In the project the main objective is to be an alarm and when the sun come up the music starts playing and you wake up and turn off the sensor.
Step 1: STEP 1. the Materials
For the creation of this light sensor we need:
- a light sensor
- battery
- computer
- arduino
- buzzer
- wire
- PSB
- male heaters
- USB cable
Step 2: STEP 2: the Construction
Firs, you need to get a arduino, the PSB and the male heaters. You can get a example of a light sensor from the internet just search: light sensor arduino. Then you need the wires to connect one information to the other, and copy from the image.
Then you need to get or make the code:
Step 3: STEP 3: the Code
#define NOTE_C1 33 #define NOTE_CS1 35 #define NOTE_D1 37 #define NOTE_DS1 39 #define NOTE_E1 41 #define NOTE_F1 44 #define NOTE_FS1 46 #define NOTE_G1 49 #define NOTE_GS1 52 #define NOTE_A1 55 #define NOTE_AS1 58 #define NOTE_B1 62 #define NOTE_C2 65 #define NOTE_CS2 69 #define NOTE_D2 73 #define NOTE_DS2 78 #define NOTE_E2 82 #define NOTE_F2 87 #define NOTE_FS2 93 #define NOTE_G2 98 #define NOTE_GS2 104 #define NOTE_A2 110 #define NOTE_AS2 117 #define NOTE_B2 123 #define NOTE_C3 131 #define NOTE_CS3 139 #define NOTE_D3 147 #define NOTE_DS3 156 #define NOTE_E3 165 #define NOTE_F3 175 #define NOTE_FS3 185 #define NOTE_G3 196 #define NOTE_GS3 208 #define NOTE_A3 220 #define NOTE_AS3 233 #define NOTE_B3 247 #define NOTE_C4 262 #define NOTE_CS4 277 #define NOTE_D4 294 #define NOTE_DS4 311 #define NOTE_E4 330 #define NOTE_F4 349 #define NOTE_FS4 370 #define NOTE_G4 392 #define NOTE_GS4 415 #define NOTE_A4 440 #define NOTE_AS4 466 #define NOTE_B4 494 #define NOTE_C5 523 #define NOTE_CS5 554 #define NOTE_D5 587 #define NOTE_DS5 622 #define NOTE_E5 659 #define NOTE_F5 698 #define NOTE_FS5 740 #define NOTE_G5 784 #define NOTE_GS5 831 #define NOTE_A5 880 #define NOTE_AS5 932 #define NOTE_B5 988 #define NOTE_C6 1047 #define NOTE_CS6 1109 #define NOTE_D6 1175 #define NOTE_DS6 1245 #define NOTE_E6 1319 #define NOTE_F6 1397 #define NOTE_FS6 1480 #define NOTE_G6 1568 #define NOTE_GS6 1661 #define NOTE_A6 1760 #define NOTE_AS6 1865 #define NOTE_B6 1976 #define NOTE_C7 2093 #define NOTE_CS7 2217 #define NOTE_D7 2349 #define NOTE_DS7 2489 #define NOTE_E7 2637 #define NOTE_F7 2794 #define NOTE_FS7 2960 #define NOTE_G7 3136 #define NOTE_GS7 3322 #define NOTE_A7 3520 #define NOTE_AS7 3729 #define NOTE_B7 3951 #define NOTE_C8 4186 #define NOTE_CS8 4435 #define NOTE_D8 4699 #define NOTE_DS8 4978
#define melodyPin 3 //Mario main theme melody int melody[] = { NOTE_E7, NOTE_E7, 0, NOTE_E7, 0, NOTE_C7, NOTE_E7, 0, NOTE_G7, 0, 0, 0, NOTE_G6, 0, 0, 0,
NOTE_C7, 0, 0, NOTE_G6, 0, 0, NOTE_E6, 0, 0, NOTE_A6, 0, NOTE_B6, 0, NOTE_AS6, NOTE_A6, 0,
NOTE_G6, NOTE_E7, NOTE_G7, NOTE_A7, 0, NOTE_F7, NOTE_G7, 0, NOTE_E7, 0,NOTE_C7, NOTE_D7, NOTE_B6, 0, 0,
NOTE_C7, 0, 0, NOTE_G6, 0, 0, NOTE_E6, 0, 0, NOTE_A6, 0, NOTE_B6, 0, NOTE_AS6, NOTE_A6, 0,
NOTE_G6, NOTE_E7, NOTE_G7, NOTE_A7, 0, NOTE_F7, NOTE_G7, 0, NOTE_E7, 0,NOTE_C7, NOTE_D7, NOTE_B6, 0, 0 }; //Mario main them tempo int tempo[] = { 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
9, 9, 9, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
9, 9, 9, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, };
int LDR = 0; //analog pin to which LDR is connected, here we set it to 0 so it means A0 int LDRValue = 0; //that’s a variable to store LDR values int light_sensitivity = 330; //This is the approx value of light surrounding your LDR
void sing() { // iterate over the notes of the melody: Serial.println(" 'Mario Theme'"); int size = sizeof(melody) / sizeof(int); for (int thisNote = 0; thisNote < size; thisNote++) { // to calculate the note duration, take one second // divided by the note type. //e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc. int noteDuration = 1000 / tempo[thisNote]; buzz(melodyPin, melody[thisNote], noteDuration); // to distinguish the notes, set a minimum time between them. // the note's duration + 30% seems to work well: int pauseBetweenNotes = noteDuration * 1.30; delay(pauseBetweenNotes); // stop the tone playing: buzz(melodyPin, 0, noteDuration); } }
void buzz(int targetPin, long frequency, long length) { digitalWrite(13,HIGH); long delayValue = 1 000000/frequency/2; // calculate the delay value between transitions //// 1 second's worth of microseconds, divided by the frequency, then split in half since //// there are two phases to each cycle long numCycles = frequency * length/ 1000; // calculate the number of cycles for proper timing //// multiply frequency, which is really cycles per second, by the number of seconds to //// get the total number of cycles to produce for (long i=0; i < numCycles; i++){ // for the calculated length of time... digitalWrite(targetPin,HIGH); // write the buzzer pin high to push out the diaphram delayMicroseconds(delayValue); // wait for the calculated delay value digitalWrite(targetPin,LOW); // write the buzzer pin low to pull back the diaphram delayMicroseconds(delayValue); // wait again or the calculated delay value } digitalWrite(13,LOW);
}
void setup() { Serial.begin(9600); //start the serial monitor with 9600 buad pinMode(3, OUTPUT); //we mostly use 13 because there is already a built in yellow LED in arduino which shows output when 13 pin is enabled } void loop()
{ LDRValue = analogRead(LDR); //reads the ldr’s value through LDR Serial.println(LDRValue); //prints the LDR values to serial monitor delay(50); //This is the speed by which LDR sends value to arduino if (LDRValue > light_sensitivity) { //digitalWrite(3, HIGH); sing(); } else { digitalWrite(13, LOW); } }
Step 4: STEP 4: What Is the Code?
The code is the information that we want us to pass the arduino. So in the code we have the information that we want to transmit. For this we need to install the arduino in the computer and write the code on it.
- This "#define NOTE" is the note for the Mario theme song that we want to play.
- Then we have the"//Mario main them tempo int tempo[] = {" this is the time for each note and the frequency.
- And all the rest of the code is how the song is going to play and when, in our case is when the light hit the top of the box.
Step 5: STEP 5. Making Simple
In our project we wish they were used every day as an alarm so we made it a smaller and simple version that don't need the USB cable. Instead of use the cable we put a battery so you don't need to stay with day computer open all night. You need to sold the male heaters to the arduino. You also need to take out some of those if necessary. In this step you need to be VERY carefully because is to hot, and also you can't connect two male heaters together.
We also crate a box that the light can pass, so when the sun rises it starts ringing the alarm. We create the box in: http://www.makercase.com/ .
Step 6: The Result
Finally when the whole box is glued, you can put next to you when you go to sleep, let the curtain open for the light to pass, remember to see if is working at night with you cellphone light and if necessary change the battery. And you're done!