Lab 5/ HW 5

Lab 5 (Potentiometer Reading):

//Potentiometer Reading Program

const int TempSense=0;    //Temperature sensor on analog pin 0

const int RLED = 11; //Blue LED on Pin 9

const int GLED = 10; //Green LED on Pin 10

const int BLED = 9; //Red LED on Pin 11

int val = 0;        //variable to hold the analog reading from the POT

void setup() {

  Serial.begin(9600);   //Start Serial Communication

  digitalWrite(RLED, LOW);

  digitalWrite(GLED, LOW);

  digitalWrite(BLED, LOW);

}

void loop() {

  val = analogRead(TempSense);  //Read one value from the POT

  Serial.println(val);    //print it to the serial port

  delay(700);

  if(val>150) //if temp > 146, turn LED Red

  {

    analogWrite(RLED, 255);

    analogWrite(GLED, 0);

    analogWrite(BLED, 0);

  }

  if(val<=145) //if temp <= 145, turn LED Green

  {

    analogWrite(RLED, 0);

    analogWrite(GLED, 255);

    analogWrite(BLED, 0);

  }

  if(val<140)  //if temp < 140, turn LED Blue

  {

    analogWrite(RLED, 0);

    analogWrite(GLED, 0);

    analogWrite(BLED, 255);

  }

}

HW (Wavelength):

#include <stdio.h>

#include <math.h>

float period1, period2, wavelength1, wavelength2, waveheight1, waveheight2, newperiod, time, sum, increment, frequency1, frequency2, wave1, wave2, new_height, low_height;

float PI = 3.141593;

int main(void)

{

printf("Enter integer wave period (s) and wave height (ft) for wave 1:\n");

scanf("%f %f", &period1, &waveheight1);

printf("Enter integer wave period (s) and wave height (ft) for wave 2:\n");

scanf("%f %f", &period2, &waveheight2);

wavelength1 = 5.13*pow(period1,2);

wavelength2 = 5.13*pow(period2,2);

newperiod = period1*period2;

increment = newperiod/200;

frequency1 = 1/period1;

frequency2 = 1/period2;

int time = 0;

float wavemax = 0;

int steps = 0;

float sum = 0;

float wavemin = 0;

for (steps=0; steps<= 200; steps++)

{

time = steps*increment;

wave1 = waveheight1*sin(2*PI*frequency1*time);

//printf("%f \n", wave1);

wave2 = waveheight2*sin(2*PI*frequency2*time);

sum = wave1 + wave2;

//printf("%f \n", sum);

if (sum > wavemax)

{wavemax=sum;}

if (sum < wavemin)

{wavemin=sum;}

}

new_height = wavemax;

low_height = wavemin;

printf("Wavelength1: %.4f ft \nWavelength2: %.4f ft \nMax Wave Height(Maximum Crescent): %.4f\nMinimum Trough: %.4f ft", wavelength1, wavelength2, new_height, low_height);

return 0;

}