Joe Cohen's 3 In-Class Exercises

#1

/* Code by Wm. Joe Cohen for

Physical Computing Studio */

int ledPin = 5;

int photoPin = 0;

int photoValue = 0;

int lightValue = 0;

void setup() {

pinMode(ledPin, OUTPUT);

pinMode(photoPin, INPUT);

Serial.begin(9600);

}

void loop() {

photoValue = analogRead(photoPin);

lightValue = photoValue;

//lightValue = photoValue / 4;

Serial.println(lightValue);

analogWrite(ledPin, lightValue);

delay(100);

}

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#2

/* Code by Wm. Joe Cohen for

Physical Computing Studio */

int timer = 50;

int ledPins[] = {

7, 6, 5, 4, 3 };

int pinCount = 5;

int photoPin = 0;

int photoValue = 0;

void setup() {

int thisPin;

for (int thisPin = 0; thisPin <>

pinMode(ledPins[thisPin], OUTPUT);

}

pinMode(photoPin, INPUT);

Serial.begin(9600);

}

void loop() {

photoValue = analogRead(photoPin);

// lighter environment (values of 30+) moves the LED flow one way

if(photoValue >= 30) {

for (int thisPin = 0; thisPin <>

digitalWrite(ledPins[thisPin], HIGH);

delay(timer);

digitalWrite(ledPins[thisPin], LOW);

Serial.println(photoValue);

}

}

// darker environment (values of 29-) moves the LED flow the opposite way

if(photoValue <= 29) {

for (int thisPin = pinCount - 1; thisPin >= 0; thisPin--) {

digitalWrite(ledPins[thisPin], HIGH);

delay(timer);

digitalWrite(ledPins[thisPin], LOW);

Serial.println(photoValue);

}

}

}

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#3

/* Code by Wm. Joe Cohen for

Physical Computing Studio */

int timer = 50;

int ledPins[] = {

7, 6, 5, 4, 3 };

int pinCount = 5;

int photoPin = 0;

int photoValue = 0;

void setup() {

int thisPin;

for (int thisPin = 0; thisPin <>

pinMode(ledPins[thisPin], OUTPUT);

}

pinMode(photoPin, INPUT);

Serial.begin(9600);

}

void loop() {

photoValue = analogRead(photoPin);

int newTimer1;

int newTimer2;

// lighter environment (values of 30+) moves the LED flow one way

// and the LEDs move 10 times slower than 'time'

if(photoValue >= 30) {

for (int thisPin = 0; thisPin <>

newTimer1 = timer * 10;

digitalWrite(ledPins[thisPin], HIGH);

delay(newTimer1);

digitalWrite(ledPins[thisPin], LOW);

Serial.println(photoValue);

}

}

// darker environment (values of 29-) moves the LED flow the opposite way

// and the LEDs move 2 times faster than 'time'

if(photoValue <= 29) {

for (int thisPin = pinCount - 1; thisPin >= 0; thisPin--) {

newTimer2 = timer / 2;

digitalWrite(ledPins[thisPin], HIGH);

delay(newTimer2);

digitalWrite(ledPins[thisPin], LOW);

Serial.println(photoValue);

}

}

}