Part A. Making Sounds

a. How would you change the code to make the song play twice as fast?

Double the speed of the noteDuration by changing 1000/ to 500/

int noteDuration = 1000/noteDurations[thisNote];  -->  int noteDuration = 500/noteDurations[thisNote];✔

b. What song is playing? ;-)

Star Wars of course!✔

 

Part B. Writing to the LCD

a. What voltage level do you need to power your display?

5v✔

b. What was one mistake you made when wiring up the display? How did you fix it?

I didn't really make any mistakes in the wiring. But later on, my unorganized wires were very stressful to navigate when the I trying to figure out why the LCD wasn't working.✔

c. What line of code do you need to change to make it flash your name instead of "Hello World"?

Change line 48 to lcd.print("Cole Hoffer");✔

 

Part C. Fancy Inputs

1. Potentiometer

a. Post a copy of your new code in your lab writeup.

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

int sensorPin = A0; 

int sensorValue = 0;

int ledPin = 13;

 

void setup() {

  lcd.begin(16, 2);

  Serial.begin(9600); 

}

void loop() {

  lcd.setCursor(0, 0);

  lcd.print(millis()/1000);

  lcd.setCursor(0, 1);

  sensorValue = analogRead(sensorPin);

  Serial.println(sensorValue/4.06); 

  lcd.print(sensorValue/4.06);

  analogWrite(ledPin, sensorValue/4.06); 

}

 

The 4.06 allows for the sensor range to be from 0-255 (the leds range)

✔

2. Flex Sensor

a. What resistance do you see with a Multimeter when the sensor is flat? When it is bent?

Flat = 12kOhms

Bent = 41kOhms✔

b. What kind of voltages should we expect for the Arduino analog pin based on the sensor resistance?

Vout = (R2 / (R1+R2)) * Vin

From straight to bent:

3.46v to 1.95v✔

c. How does the range of the LED's brightness change compared to the potentiometer?

The LED brightness change is lower than that of potentiometer, unless you divide the sensor value by a lower value, in order to gain the same brightness affect on the led.✔

d. Lowly Multimeter

#include <LiquidCrystal.h>

 

 

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

int sensorPin = A0;   

int sensorValue = 0;

 

void setup() {

   lcd.begin(16, 2);

 

}

 

void loop() {

   sensorValue = analogRead(sensorPin);    

   analogWrite(ledPin, sensorValue/2.79);  

   lcd.setCursor(0,0);

   lcd.print(sensorValue);

   lcd.setCursor(0,1);

   lcd.print("LED:");

   lcd.setCursor(6,1);

   lcd.print(sensorValue/2.79);

   delay(100);

 

}

 

 

     ✔

 

3. Force Sensitive Resistor

a. What resistance values do you see from your force sensor?

61kOhms to 0.5kOhms ✔

b. What kind of relationship does the resistance have as a function of force applied? (e.g., linear?)

Inverse, as force is increased, resistance decreases✔

c. Include a copy of your FSR thumb wrestling code in your lab write-up.

#include <LiquidCrystal.h>

 

 

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

int sensorPin1 = A0;   

int sensorPin2 = A1;    

int ledPin = 13;      

int sensorValue1 = 0;

int sensorValue2 = 0;

 

void setup() {

   pinMode(ledPin, OUTPUT);  

   lcd.begin(16, 2);

 

}

 

void loop() {

 sensorValue1 = analogRead(sensorPin1);

   sensorValue2 = analogRead(sensorPin2); 

   lcd.setCursor(0,1);

   lcd.print(sensorValue1);

 

   lcd.setCursor(6,1);

   lcd.print(sensorValue2);

 

 

   if(sensorValue1>sensorValue2){

      lcd.setCursor(0,0);

      lcd.print("player 1 winning");

   }

   else if(sensorValue2>sensorValue1){

      lcd.setCursor(0,0);

      lcd.print("player 2 winning");

   }

   else{

     lcd.setCursor(0,0);

     lcd.print("tie, or error");

   }

}

 

✔

 

Part D. Timer