2. Completely describe the purpose of the following program (4pts) ch? r6A§ cons

Question

2. Completely describe the purpose of the following program (4pts) ch? r6A§ const int ledPin 13: const int sensorPin -0: // the next two lines set the nin and max delay betireen blinks const int minDuration-100; const int naxDuration -1000 void setup ) pinMode (ledPin, OUTPUT) enable output on the led pin Serial.begin (9600): // initialize Serial void loop ) int rate-analogRead (sensorPin): 11 read the analog input // the next line scales the blink rate between the nin and max values rate = map (rate, 200,800,mìnDuration, maxDuration); Serial.printin (rate): digitalWrite (ledPin, HIGH): delay (rate): digitalWrite (ledPin, LOW) delay (rate)?

Explanation / Answer

This program implements led blinking by inserting different delay intervals in each iteration/operation of blinking.

const int ledPin=13; // pin 13 will be set as output pin

const int sensorPin=0;                                                 // pin 0 is set as input pin

const int minDuration = 100; // minimum delay (used to scale input)

const int maxDuration = 1000; // maximum delay (used to scale input)

// Setup function is the starting point of this program and all the initialization are done in this function

// Setup function is executed only once in the beginning of execution

void setup() {

            pinMode(ledPin, OUTPUT); // Set pin 13 as output pin

            Serial.begin(9600);                                          // Set data rate for serial data transmission to 9600

}

// This is main loop executed after setup(), statements in loop() will be executed continuously until board is turned off or reset

void loop() {

            int rate = analogRead(sensorPin);                   // Read data from pin 0

            // This function remaps a variable(1st argument) from some old range(200-800) to a new range(minDuration-maxDuration)

            // It is used for scaling the range which rate can take value from

            rate = map(rate, 200,800,minDuration,maxDuration);

           

            Serial.println(rate);                                          // Print new rate value over serial output

            digitalWrite(ledPin,HIGH); // Turn on pin 13

            delay(rate); // Sleep for time "rate"

            digitalWrite(ledPin,LOW); // Turn off pin 13

            delay(rate); // Sleep for time "rate"

}

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