Arduino Simple Pendulum Experiment

Experiment to find the time period of the simple pendulum using arduino board and an ir sensor.

Things Required:
1. Arduino Board
2. IR Sensor
3. Simple Pendulum
The Code For The Experiment
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unsigned long pretime;
unsigned long currtime;
int pin = 2;
unsigned long timePeriod;
boolean flag = true;
float t;


void setup(){
 Serial.begin(9600);
 pinMode(pin, INPUT);
 pretime = micros();
 Serial.println("Initialized");

 }

void loop(){
 if (digitalRead(pin) == 0)
 {
   if (flag == true)
   {
   currtime = micros();
   timePeriod = currtime-pretime;
   pretime = currtime;
   flag = !flag;
     t = timePeriod/1000;
     Serial.println(timePeriod/1000);
     delay(100);
     
   }
   else{
     flag = !flag;
     delay(100);
   }
 }
}

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Just Copy Paste The Code.
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