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Lab3_NJ

Page history last edited by Benjamin Tee 7 years, 9 months ago

Grade for Lab 2 from William North: Check+

 

A)

a)

 

/*
  Melody
 
 Plays a melody
 
 circuit:
 * 8-ohm speaker on digital pin 8
 
 created 21 Jan 2010
 modified 30 Aug 2011
 by Tom Igoe

This example code is in the public domain.
 
 http://arduino.cc/en/Tutorial/Tone
 
 */
 #include "pitches.h"

// notes in the melody:
int melody[] = {
  NOTE_C4, NOTE_G3,NOTE_G3, NOTE_A3, NOTE_G3,0, NOTE_B3, NOTE_C4};

// note durations: 4 = quarter note, 8 = eighth note, etc.:
int noteDurations[] = {
  4, 8, 8, 4,4,4,4,4 };

void setup() {
  // iterate over the notes of the melody:
  for (int thisNote = 0; thisNote < 8; 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/noteDurations[thisNote];
    noteDuration=noteDuration/2;
    tone(8, 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:
    noTone(8);
  }
}

void loop() {
  // no need to repeat the melody.
}

b) Star Wars Theme

 

B)

 

a) 5V.

 

b) No mistake. Everything worked.

 

c)

 

/*
  LiquidCrystal Library - display() and noDisplay()
 
 Demonstrates the use a 16x2 LCD display.  The LiquidCrystal
 library works with all LCD displays that are compatible with the
 Hitachi HD44780 driver. There are many of them out there, and you
 can usually tell them by the 16-pin interface.
 
 This sketch prints "Hello World!" to the LCD and uses the
 display() and noDisplay() functions to turn on and off
 the display.
 
 The circuit:
 * LCD RS pin to digital pin 12
 * LCD Enable pin to digital pin 11
 * LCD D4 pin to digital pin 5
 * LCD D5 pin to digital pin 4
 * LCD D6 pin to digital pin 3
 * LCD D7 pin to digital pin 2
 * LCD R/W pin to ground
 * 10K resistor:
 * ends to +5V and ground
 * wiper to LCD VO pin (pin 3)
 
 Library originally added 18 Apr 2008
 by David A. Mellis
 library modified 5 Jul 2009
 by Limor Fried (http://www.ladyada.net)
 example added 9 Jul 2009
 by Tom Igoe
 modified 22 Nov 2010
 by Tom Igoe

 This example code is in the public domain.

 http://www.arduino.cc/en/Tutorial/LiquidCrystal
 */

// include the library code:
#include <LiquidCrystal.h>

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
  // set up the LCD's number of columns and rows:
  lcd.begin(16, 2);
  // Print a message to the LCD.
  lcd.print("Nimit Jain");
}

void loop() {
  // Turn off the display:
  lcd.noDisplay();
  delay(500);
   // Turn on the display:
  lcd.display();
  delay(500);
}

 

C.

 

a) LED on Teensy board used

/*
  Analog Input
 Demonstrates analog input by reading an analog sensor on analog pin 0 and
 turning on and off a light emitting diode(LED)  connected to digital pin 13.
 The amount of time the LED will be on and off depends on
 the value obtained by analogRead().
 
 The circuit:
 * Potentiometer attached to analog input 0
 * center pin of the potentiometer to the analog pin
 * one side pin (either one) to ground
 * the other side pin to +5V
 * LED anode (long leg) attached to digital output 13
 * LED cathode (short leg) attached to ground
 
 * Note: because most Arduinos have a built-in LED attached
 to pin 13 on the board, the LED is optional.
 
 
 Created by David Cuartielles
 modified 30 Aug 2011
 By Tom Igoe
 
 This example code is in the public domain.
 
 http://arduino.cc/en/Tutorial/AnalogInput
 
 */

int sensorPin = A0;    // select the input pin for the potentiometer
int ledPin = 11;      // select the pin for the LED
  // Pin 13: Arduino has an LED connected on pin 13
  // Pin 11: Teensy 2.0 has the LED on pin 11
  // Pin 6: Teensy++ 2.0 has the LED on pin 6
int sensorValue = 0;  // variable to store the value coming from the sensor

void setup() {
  // declare the ledPin as an OUTPUT:
  pinMode(ledPin, OUTPUT); 
}

void loop() {
  // read the value from the sensor:
  sensorValue = analogRead(sensorPin);   
  // turn the ledPin on
  digitalWrite(ledPin, HIGH); 
  // stop the program for <sensorValue> milliseconds:
  delay(sensorValue);         
  // turn the ledPin off:       
  digitalWrite(ledPin, LOW);  
  // stop the program for for <sensorValue> milliseconds:
  delay(sensorValue);                 
}

 

2.

a) Straight--8.1 kOhm

Bent--17.5 kOhm

b) Note that the power supply was 5V. We would expect values ranging from 2.8 V-3.7 V.✓vv

 

c) The range is much smaller as would be expected since the input voltage range dropped from 0-5V to 2.8-3.7V. When the flex sensor is bent, the rate of blinking decreases. This makes sense: Increased resistance means decreased voltage at the analog pin input. Decreased voltage means an increased analog input, an increased delay and a decreased blinking rate. 

d)

/*
  Analog Input
 Demonstrates analog input by reading an analog sensor on analog pin 0 and
 turning on and off a light emitting diode(LED)  connected to digital pin 13.
 The amount of time the LED will be on and off depends on
 the value obtained by analogRead().
 
 The circuit:
 * Potentiometer attached to analog input 0
 * center pin of the potentiometer to the analog pin
 * one side pin (either one) to ground
 * the other side pin to +5V
 * LED anode (long leg) attached to digital output 13
 * LED cathode (short leg) attached to ground
 
 * Note: because most Arduinos have a built-in LED attached
 to pin 13 on the board, the LED is optional.
 
 
 Created by David Cuartielles
 modified 30 Aug 2011
 By Tom Igoe
 
 This example code is in the public domain.
 
 http://arduino.cc/en/Tutorial/AnalogInput
 
 */
 // include the library code:
#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

int sensorPin = A0;    // select the input pin for the potentiometer
int ledPin = 11;      // select the pin for the LED
  // Pin 13: Arduino has an LED connected on pin 13
  // Pin 11: Teensy 2.0 has the LED on pin 11
  // Pin 6: Teensy++ 2.0 has the LED on pin 6
int sensorValue = 0;  // variable to store the value coming from the sensor
void setup() {
  // declare the ledPin as an OUTPUT:
  pinMode(ledPin, OUTPUT); 
    // set up the LCD's number of columns and rows:           
}

void loop() {
  // read the value from the sensor:
  sensorValue = analogRead(sensorPin); 
  int mappedValue = map(sensorValue,480,770,0,1023); //Start and end points determined experimentally
  lcd.begin(16, 2);                                                                                                                                                                                                      
  lcd.print(sensorValue,DEC);
  lcd.print("   ");
  lcd.print(mappedValue,DEC); 
  // turn the ledPin on
  digitalWrite(ledPin, HIGH); 
  // stop the program for <sensorValue> milliseconds:
  delay(mappedValue);         
  // turn the ledPin off:       
  digitalWrite(ledPin, LOW);  
  // stop the program for for <sensorValue> milliseconds:
  delay(mappedValue);                 
}

 

3.

a) When not pressed at all, resistance is very high ~MOhm. When pressed hard, resistance was around 3 kOhm.

b) The relationship is definitely not linear as even the slightest contact can bring down the resistance from very high (approaching infinity) to a few kOhm.

c) /*Idea is to use a voltage divider circuit with FSR on each sub-branch. If the first player is pressing harder, analog input value should increase. If the second player is pressing harder, analog input value should decrease.*/

 

/*
  Analog Input
 Demonstrates analog input by reading an analog sensor on analog pin 0 and
 turning on and off a light emitting diode(LED)  connected to digital pin 13.
 The amount of time the LED will be on and off depends on
 the value obtained by analogRead().
 
 The circuit:
 * Potentiometer attached to analog input 0
 * center pin of the potentiometer to the analog pin
 * one side pin (either one) to ground
 * the other side pin to +5V
 * LED anode (long leg) attached to digital output 13
 * LED cathode (short leg) attached to ground
 
 * Note: because most Arduinos have a built-in LED attached
 to pin 13 on the board, the LED is optional.
 
 
 Created by David Cuartielles
 modified 30 Aug 2011
 By Tom Igoe
 
 This example code is in the public domain.
 
 http://arduino.cc/en/Tutorial/AnalogInput
 
 */
 // include the library code:
#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

int sensorPin = A0;    // select the input pin for the potentiometer
int ledPin = 11;      // select the pin for the LED
  // Pin 13: Arduino has an LED connected on pin 13
  // Pin 11: Teensy 2.0 has the LED on pin 11
  // Pin 6: Teensy++ 2.0 has the LED on pin 6
int sensorValue = 0;  // variable to store the value coming from the sensor
void setup() {
  // declare the ledPin as an OUTPUT:
  pinMode(ledPin, OUTPUT); 
 
    // set up the LCD's number of columns and rows:           
}
int startValue=analogRead(sensorPin);
void loop() {
  // read the value from the sensor:
  sensorValue = analogRead(sensorPin); 
//  int mappedValue = map(sensorValue,480,770,0,1023); //Start and end points determined experimentally
  lcd.begin(16, 2);                                                                                                                                                                                                      
  /*lcd.print(sensorValue,DEC);
  lcd.print("   ");
  lcd.print(mappedValue,DEC); 
  // turn the ledPin on
  digitalWrite(ledPin, HIGH); 
  // stop the program for <sensorValue> milliseconds:
  delay(mappedValue);         
  // turn the ledPin off:       
  digitalWrite(ledPin, LOW);  
  // stop the program for for <sensorValue> milliseconds:
  delay(mappedValue);                  */
  lcd.print(sensorValue,DEC);
  lcd.print("  ");
  if (sensorValue<(startValue-40)) //To account for noise in system
    lcd.print("Winner:2");
  else
  {
    if (sensorValue>(startValue+40)) //To account for noise in system
      lcd.print("Winner:1");
    else
       lcd.print("Tie")    ;
  }
  delay(2000);
}

D.

 

/*
  Analog Input
 Demonstrates analog input by reading an analog sensor on analog pin 0 and
 turning on and off a light emitting diode(LED)  connected to digital pin 13.
 The amount of time the LED will be on and off depends on
 the value obtained by analogRead().
 
 The circuit:
 * Potentiometer attached to analog input 0
 * center pin of the potentiometer to the analog pin
 * one side pin (either one) to ground
 * the other side pin to +5V
 * LED anode (long leg) attached to digital output 13
 * LED cathode (short leg) attached to ground
 
 * Note: because most Arduinos have a built-in LED attached
 to pin 13 on the board, the LED is optional.
 
 
 Created by David Cuartielles
 modified 30 Aug 2011
 By Tom Igoe
 
 This example code is in the public domain.
 
 http://arduino.cc/en/Tutorial/AnalogInput
 
 */
 // include the library code:
#include <LiquidCrystal.h>

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

int sensorPin = A0;    // select the input pin for the potentiometer
int ledPin = 11;      // select the pin for the LED
  // Pin 13: Arduino has an LED connected on pin 13
  // Pin 11: Teensy 2.0 has the LED on pin 11
  // Pin 6: Teensy++ 2.0 has the LED on pin 6
int sensorValue = 0;  // variable to store the value coming from the sensor

#include "pitches.h"

// notes in the melody:
int melody[] = {NOTE_D3,NOTE_D3,NOTE_D3,NOTE_G3,NOTE_D4,NOTE_C4,NOTE_B3,NOTE_A3,NOTE_G4,NOTE_D4, NOTE_C4,NOTE_B3,NOTE_A3,NOTE_G4,NOTE_D4,NOTE_C4,NOTE_B3,NOTE_C4,NOTE_A3,0};


// note durations: 4 = quarter note, 8 = eighth note, etc.:
int noteDurations[] = {  10,10,10,2,2,10,10,10,2,4, 10,10,10,2,4,10,10,10,2,4};


void setup() {
  // declare the ledPin as an OUTPUT:
  pinMode(ledPin, OUTPUT); 
  sensorValue=analogRead(sensorPin);
  int mappedValue = map(sensorValue,480,770,0,1023);
  for (int i=mappedValue%10; i>-1; i--)
  {
    lcd.begin(16,2);
    lcd.print(i,DEC);
    delay(1000);  
  }
 
    for (int thisNote = 0; thisNote < 20; 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/noteDurations[thisNote];
    tone(8, 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:
    noTone(8);
  }  
}
void loop() {
}

Video posted in my folder on the class website

 

 

 

 

 

Comments (1)

Benjamin Tee said

at 11:10 am on Aug 10, 2012

Great job!
Try to use youtube or other streaming sites if possible to convert your videos.

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