Homework Number 4

OPEN JET MODIFICATIONS

/* This code will allow you to calculate the acceleration and velocity of a jet

with a parameter of time input. It will allow you to choose your output and input unit

preference */

#include <stdio.h>

#include <math.h>

int main(void)

{

/* Declare variables. */

char input_method, output_method, more = 'y';

double itime, velocity, acceleration, minutes, velocity_feet_sec, velocity_feet_min, acceleration_feet_sec, acceleration_feet_min;

/* Get time value from the keyboard. */

while (more == 'y'){

printf("Choose input method: (s)econds/(m)inutes");

scanf(" %c", &input_method);

printf("Choose output method: (m)eters/sec, (f)eet/sec, feet/m(i)nute");

scanf(" %c", &output_method);

if (input_method == 'm'){

printf("Enter new time value in minutes: \n");

scanf(" %lf", &minutes);

itime = minutes*60; }

else{

printf("Enter new time value in seconds: \n");

scanf(" %lf",&itime);}

/* Compute velocity and acceleration. */

velocity = 0.00001*pow(itime,3) - 0.00488*pow(itime,2) + 0.75795*itime + 181.3566;

acceleration = 3 - 0.000062*velocity*velocity;

/* Print velocity and acceleration. */

velocity_feet_sec = velocity*3.2808399;

acceleration_feet_sec = acceleration*3.2808399;

velocity_feet_min = (velocity_feet_sec)*60;

acceleration_feet_min = (acceleration_feet_sec)*3600;

if (output_method == 'm'){

printf("Velocity = %8.3f m/s \n",velocity);

printf("Acceleration = %8.3f m/sˆ2 \n",acceleration); }

if (output_method == 'f'){

printf("Velocity = %8.3f f/s \n", velocity_feet_sec);

printf("Acceleration = %8.3f f/s^2 \n", acceleration_feet_sec);}

if (output_method == 'i'){

printf("Velocity = %8.3f f/min \n", velocity_feet_min);

printf("Acceleration = %8.3f f/min^2 \n", acceleration_feet_min);}

/* Exit program. */

printf("Enter a new time and go again? (y/n)");

scanf(" %c", &more);

}

return 0;

}

LOGARITHMIC CODE

/* This code performs logarithmic functions given the base and the number */

#include <stdio.h>

#include <math.h>

int main(void) {

char more = 'y';

float base, number, answer;

while (more == 'y'){

printf("Input the base number:");

scanf(" %f", &base);

printf("Input a positive number:");

scanf(" %f", &number);

answer = log(number)/log(base);

printf("Answer : %2.1f . ( %2.1f ^ %2.1f = %2.1f) \n", answer, base, answer, number);

printf("Again? (y/n)");

scanf(" %c", &more);

}

}

ARDUINO SKETCH FOR LED

/*This sketch allows you to switch through several colors in an RGB led.

One button switches, while 3 buttons control Red, Blue and Green colors. A 5th button

will cause the current color to blink on and off */
const int BLED=6; //Blue LED on Pin 9
const int GLED=5; //Green LED on Pin 10
const int RLED=3; //Red LED on Pin 11
const int BUTTON=13;
const int redbutton = 12;
const int blueutton = 11;
const int greenbutton = 10;
const int blink_button = 8;
boolean lastButton = LOW; //Last Button State
boolean currentButton = LOW; //Current Button State
int ledMode = 0; //Cycle between LED states
void setup()
{
 pinMode (BLED, OUTPUT); //Set Blue LED as Output
 pinMode (GLED, OUTPUT); //Set Green LED as Output
 pinMode (RLED, OUTPUT); //Set Red LED as Output
 pinMode (BUTTON, INPUT); //Set button as input (not required)
}
/*
* Debouncing Function Pass it the previous button state,
* and get back the current debounced button state.
* /*
* Debouncing Function Pass it the previous button state,
* and get back the current debounced button state.
*/
boolean debounce(boolean last)
{
 boolean current = digitalRead(BUTTON); //Read the button state
 if (last != current) //if it's different...
 {
 delay(5); //wait 5ms
 current = digitalRead(BUTTON); //read it again
 }
 return current; //return the current value
}
/*
* LED Mode Selection Pass a number for the LED state and set it accordingly.
*/
void setMode(int mode)
{
 //RED
 switch (mode){
  case 1:
   digitalWrite(RLED, HIGH);
   digitalWrite(GLED, LOW);
   digitalWrite(BLED, LOW);
   break;
  
 //GREEN
  case 2:
   digitalWrite(RLED, LOW);
   digitalWrite(GLED, HIGH);
   digitalWrite(BLED, LOW); 
  //BLUE
   break;

  case 3:
   digitalWrite(RLED, LOW);
   digitalWrite(GLED, LOW);
   digitalWrite(BLED, HIGH);
   break;
 //PURPLE (RED+BLUE)
  case 4:
   digitalWrite(RLED, HIGH);
   digitalWrite(GLED, LOW);
   digitalWrite(BLED, HIGH);
   break;  

  case 5:
   digitalWrite(RLED, LOW);
   digitalWrite(GLED, HIGH);
   analogWrite(BLED, 200);
   break;
/* teal */
  case 6:
   analogWrite(RLED, 255);
   analogWrite(GLED, 200);
   digitalWrite(BLED, LOW);
   break;
  /*orange*/

  case 7:
   analogWrite(RLED, 255);
   analogWrite(GLED, 255);
   analogWrite(BLED, 255);
   break;
   
 //OFF (mode = 0)
  default:
   digitalWrite(RLED, LOW);
   digitalWrite(GLED, LOW);
   digitalWrite(BLED, LOW);
   break;
}
}

void loop(){
 while (digitalRead (12) or digitalRead(11) or digitalRead(10))
{
  if (digitalRead(12) == HIGH){
   digitalWrite(RLED, HIGH);
   digitalWrite(GLED, LOW);
   digitalWrite(BLED, LOW);
   return;}
  if (digitalRead(11) == HIGH){
   digitalWrite(RLED, LOW);
   digitalWrite(GLED, LOW);
   digitalWrite(BLED, HIGH);
   return;}
  if (digitalRead(10) == HIGH){
   digitalWrite(RLED, LOW);
   digitalWrite(GLED, HIGH);
   digitalWrite(BLED, LOW);
   return;}
}
 currentButton = debounce(lastButton); //read debounced state

 while (digitalRead(blink_button)){
  setMode(ledMode);
  delay(100);
  setMode(30);
  delay(100);
 }

 if (lastButton == LOW && currentButton == HIGH) //if it was pressed...
 {
 ledMode++; //increment the LED value
 }
 lastButton = currentButton; //reset button value
 //if you've cycled through the different options,
 //reset the counter to 0
 if (ledMode == 8) ledMode = 0;
 setMode(ledMode); //change the LED state
}