Added Starter Kit examples

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Scott 2012-10-12 13:23:48 -04:00
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/*
Arduino Starter Kit example
Project 2 - Spaceship Interface
This sketch is written to accompany Project 2 in the
Arduino Starter Kit
Parts required:
1 green LED
2 red LEDs
pushbutton
10 kilohm resistor
3 220 ohm resistors
Created 13 September 2012
by Scott Fitzgerald
http://arduino.cc/starterKit
This example code is part of the public domain
*/
// Create a global variable to hold the
// state of the switch. This variable is persistent
// throughout the program. Whenever you refer to
// switchState, youre talking about the number it holds
int switchstate = 0;
void setup(){
// declare the LED pins as outputs
pinMode(3,OUTPUT);
pinMode(4,OUTPUT);
pinMode(5,OUTPUT);
// declare the switch pin as an input
pinMode(2,INPUT);
}
void loop(){
// read the value of the switch
// digitalRead() checks to see if there is voltage
// on the pin or not
switchstate = digitalRead(2);
// if the button is not pressed
// blink the red LEDs
if (switchstate == LOW) {
digitalWrite(3, HIGH); // turn the green LED on pin 3 on
digitalWrite(4, LOW); // turn the red LED on pin 4 off
digitalWrite(5, LOW); // turn the red LED on pin 5 off
}
// this else is part of the above if() statement.
// if the switch is not LOW (the button is pressed)
// the code below will run
else {
digitalWrite(3, LOW); // turn the green LED on pin 3 off
digitalWrite(4, LOW); // turn the red LED on pin 4 off
digitalWrite(5, HIGH); // turn the red LED on pin 5 on
// wait for a quarter second before changing the light
delay(250);
digitalWrite(4, HIGH); // turn the red LED on pin 4 on
digitalWrite(5, LOW); // turn the red LED on pin 5 off
// wait for a quarter second before changing the light
delay(250);
}
}

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/*
Arduino Starter Kit example
Project 3 - Love-O-Meter
This sketch is written to accompany Project 3 in the
Arduino Starter Kit
Parts required:
1 TMP36 temperature sensor
3 red LEDs
3 220 ohm resistors
Created 13 September 2012
by Scott Fitzgerald
http://arduino.cc/starterKit
This example code is part of the public domain
*/
// named constant for the pin the sensor is connected to
const int sensorPin = A0;
// room temperature in Celcius
const float baselineTemp = 20.0;
void setup(){
// open a serial connection to display values
Serial.begin(9600);
// set the LED pins as outputs
// the for() loop saves some extra coding
for(int pinNumber = 2; pinNumber<5; pinNumber++){
pinMode(pinNumber,OUTPUT);
digitalWrite(pinNumber, LOW);
}
}
void loop(){
// read the value on AnalogIn pin 0
// and store it in a variable
int sensorVal = analogRead(sensorPin);
// send the 10-bit sensor value out the serial port
Serial.print("sensor Value: ");
Serial.print(sensorVal);
// convert the ADC reading to voltage
float voltage = (sensorVal/1024.0) * 5.0;
// Send the voltage level out the Serial port
Serial.print(", Volts: ");
Serial.print(voltage);
// convert the voltage to temperature in degrees C
// the sensor changes 10 mV per degree
// the datasheet says there's a 500 mV offset
// ((volatge - 500mV) times 100)
Serial.print(", degrees C: ");
float temperature = (voltage - .5) * 100;
Serial.println(temperature);
// if the current temperature is lower than the baseline
// turn off all LEDs
if(temperature < baselineTemp){
digitalWrite(2, LOW);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
} // if the temperature rises 2-4 degrees, turn an LED on
else if(temperature >= baselineTemp+2 && temperature < baselineTemp+4){
digitalWrite(2, HIGH);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
} // if the temperature rises 4-6 degrees, turn a second LED on
else if(temperature >= baselineTemp+4 && temperature < baselineTemp+6){
digitalWrite(2, HIGH);
digitalWrite(3, HIGH);
digitalWrite(4, LOW);
} // if the temperature rises more than 6 degrees, turn all LEDs on
else if(temperature >= baselineTemp+6){
digitalWrite(2, HIGH);
digitalWrite(3, HIGH);
digitalWrite(4, HIGH);
}
delay(1);
}

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/*
Arduino Starter Kit example
Project 4 - Color Mixing Lamp
This sketch is written to accompany Project 3 in the
Arduino Starter Kit
Parts required:
1 RGB LED
three 10 kilohm resistors
3 220 ohm resistors
3 photoresistors
red green aand blue colored gels
Created 13 September 2012
by Scott Fitzgerald
Thanks to Federico Vanzati for improvements
http://arduino.cc/starterKit
This example code is part of the public domain
*/
const int greenLEDPin = 9; // LED connected to digital pin 9
const int redLEDPin = 10; // LED connected to digital pin 10
const int blueLEDPin = 11; // LED connected to digital pin 11
const int redSensorPin = A0; // pin with the photoresistor with the red gel
const int greenSensorPin = A1; // pin with the photoresistor with the green gel
const int blueSensorPin = A2; // pin with the photoresistor with the blue gel
int redValue = 0; // value to write to the red LED
int greenValue = 0; // value to write to the green LED
int blueValue = 0; // value to write to the blue LED
int redSensorValue = 0; // variable to hold the value from the red sensor
int greenSensorValue = 0; // variable to hold the value from the green sensor
int blueSensorValue = 0; // variable to hold the value from the blue sensor
void setup() {
// initialize serial communications at 9600 bps:
Serial.begin(9600);
// set the digital pins as outputs
pinMode(greenLedPin,OUTPUT);
pinMode(redLedPin,OUTPUT);
pinMode(blueLedPin,OUTPUT);
}
void loop() {
// Read the sensors first:
// read the value from the red-filtered photoresistor:
redsensorValue = analogRead(redsensorPin);
// give the ADC a moment to settle
delay(5);
// read the value from the green-filtered photoresistor:
greensensorValue = analogRead(greensensorPin);
// give the ADC a moment to settle
delay(5);
// read the value from the blue-filtered photoresistor:
bluesensorValue = analogRead(bluesensorPin);
// print out the values to the serial monitor
Serial.print("raw sensor Values \t red: ");
Serial.print(redsensorValue);
Serial.print("\t green: ");
Serial.print(greensensorValue);
Serial.print("\t Blue: ");
Serial.println(bluesensorValue);
/*
In order to use the values from the sensor for the LED,
you need to do some math. The ADC provides a 10-bit number,
but analogWrite() uses 8 bits. You'll want to divide your
sensor readings by 4 to keep them in range of the output.
*/
redValue = redsensorValue/4;
greenValue = greensensorValue/4;
blueValue = bluesensorValue/4;
// print out the mapped values
Serial.print("Mapped sensor Values \t red: ");
Serial.print(redValue);
Serial.print("\t green: ");
Serial.print(greenValue);
Serial.print("\t Blue: ");
Serial.println(blueValue);
/*
Now that you have a usable value, it's time to PWM the LED.
*/
analogWrite(redLedPin, redValue);
analogWrite(greenLedPin, greenValue);
analogWrite(blueLedPin, blueValue);
}

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/*
Arduino Starter Kit example
Project 5 - Servo Mood Indicator
This sketch is written to accompany Project 5 in the
Arduino Starter Kit
Parts required:
servo motor
10 kilohm potentiometer
2 100 uF electrolytic capacitors
Created 13 September 2012
by Scott Fitzgerald
http://arduino.cc/starterKit
This example code is part of the public domain
*/
// include the servo library
#include <Servo.h>
Servo myServo; // create a servo object
int const potPin = A0; // analog pin used to connect the potentiometer
int potVal; // variable to read the value from the analog pin
int angle; // variable to hold the angle for the servo motor
void setup() {
myServo.attach(9); // attaches the servo on pin 9 to the servo object
Serial.begin(9600); // open a serial connection to your computer
}
void loop() {
potVal = analogRead(potPin); // read the value of the potentiometer
// print out the value to the serial monitor
Serial.print("potVal: ");
Serial.print(potVal);
// scale the numbers from the pot
angle = map(potVal, 0, 1023, 0, 179);
// print out the angle for the servo motor
Serial.print(", angle: ");
Serial.println(angle);
// set the servo position
myServo.write(angle);
// wait for the servo to get there
delay(15);
}

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/*
Arduino Starter Kit example
Project 6 - Light Theremin
This sketch is written to accompany Project 6 in the
Arduino Starter Kit
Parts required:
photoresistor
10 kilohm resistor
piezo
Created 13 September 2012
by Scott Fitzgerald
http://arduino.cc/starterKit
This example code is part of the public domain
*/
// variable to hold sensor value
int sensorValue;
// variable to calibrate low value
int sensorLow = 1023;
// variable to calibrate high value
int sensorHigh = 0;
// LED pin
const int ledPin = 13;
void setup() {
// Make the LED pin an output and turn it on
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, HIGH);
// calibrate for the first five seconds after program runs
while (millis() < 5000) {
// record the maximum sensor value
sensorValue = analogRead(A0);
if (sensorValue > sensorHigh) {
sensorHigh = sensorValue;
}
// record the minimum sensor value
if (sensorValue < sensorLow) {
sensorLow = sensorValue;
}
}
// turn the LED off, signaling the end of the calibration period
digitalWrite(ledPin, LOW);
}
void loop() {
//read the input from A0 and store it in a variable
sensorValue = analogRead(A0);
// map the sensor values to a wide range of pitches
int pitch = map(sensorValue, sensorLow, sensorHigh, 50, 4000);
// play the tone for 20 ms on pin 8
tone(8, pitch, 20);
// wait for a moment
delay(10);
}

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/*
Arduino Starter Kit example
Project 7 - Keyboard
This sketch is written to accompany Project 7 in the
Arduino Starter Kit
Parts required:
two 10 kilohm resistors
1 Megohm resistor
220 ohm resistor
4 pushbuttons
piezo
Created 13 September 2012
by Scott Fitzgerald
http://arduino.cc/starterKit
This example code is part of the public domain
*/
// create an array of notes
// the numbers below correspond to
// the frequencies of middle C, D, E, and F
int notes[] = {262, 294, 330, 349};
void setup() {
//start serial communication
Serial.begin(9600);
}
void loop() {
// create a local variable to hold the input on pin A0
int keyVal = analogRead(A0);
// send the value from A0 to the Serial Monitor
Serial.println(keyVal);
// play the note corresponding to each value on A0
if(keyVal == 1023){
// play the first frequency in the array on pin 8
tone(8, notes[0]);
}
else if(keyVal >= 990 && keyVal <= 1010){
// play the second frequency in the array on pin 8
tone(8, notes[1]);
}
else if(keyVal >= 505 && keyVal <= 515){
// play the third frequency in the array on pin 8
tone(8, notes[2]);
}
else if(keyVal >= 5 && keyVal <= 10){
// play the fourth frequency in the array on pin 8
tone(8, notes[3]);
}
else{
// if the value is out of range, play no tone
noTone(8);
}
}

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/*
Arduino Starter Kit example
Project 8 - Digital Hourglass
This sketch is written to accompany Project 8 in the
Arduino Starter Kit
Parts required:
10 kilohm resistor
six 220 ohm resistors
six LEDs
tilt switch
Created 13 September 2012
by Scott Fitzgerald
http://arduino.cc/starterKit
This example code is part of the public domain
*/
// named constant for the switch pin
const int switchPin = 8;
unsigned long previousTime = 0; // store the last time an LED was updated
int switchState = 0; // the current switch state
int prevSwitchState = 0; // the previous switch state
int led = 2; // a variable to refer to the LEDs
// 600000 = 10 minutes in milliseconds
long interval = 600000; // interval at which to light the next LED
void setup() {
// set the LED pins as outputs
for(int x = 2;x<8;x++){
pinMode(x, OUTPUT);
}
// set the tilt switch pin as input
pinMode(switchPin, INPUT);
}
void loop(){
// store the time since the Arduino started running in a variable
unsigned long currentTime = millis();
// compare the current time to the previous time an LED turned on
// if it is greater than your interval, run the if statement
if(currentTime - previousTime > interval) {
// save the current time as the last time you changed an LED
previousTime = currentTime;
// Turn the LED on
digitalWrite(led, HIGH);
// increment the led variable
// in 10 minutes the next LED will light up
led++;
if(led == 7){
// the hour is up
}
}
// read the switch value
switchState = digitalRead(switchPin);
// if the switch has changed
if(switchState != prevSwitchState){
// turn all the LEDs low
for(int x = 2;x<8;x++){
digitalWrite(x, LOW);
}
// reset the LED variable to the first one
led = 2;
//reset the timer
previousTime = currentTime;
}
// set the previous switch state to the current state
prevSwitchState = switchState;
}

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/*
Arduino Starter Kit example
Project 9 - Motorized Pinwheel
This sketch is written to accompany Project 9 in the
Arduino Starter Kit
Parts required:
10 kilohm resistor
pushbutton
motor
9V battery
IRF520 MOSFET
1N4007 diode
Created 13 September 2012
by Scott Fitzgerald
http://arduino.cc/starterKit
This example code is part of the public domain
*/
// named constants for the switch and motor pins
const int switchPin = 2; // the number of the switch pin
const int motorPin = 9; // the number of the motor pin
int switchState = 0; // variable for reading the switch's status
void setup() {
// initialize the motor pin as an output:
pinMode(motorPin, OUTPUT);
// initialize the switch pin as an input:
pinMode(switchPin, INPUT);
}
void loop(){
// read the state of the switch value:
switchState = digitalRead(switchPin);
// check if the switch is pressed.
if (switchState == HIGH) {
// turn motor on:
digitalWrite(motorPin, HIGH);
}
else {
// turn motor off:
digitalWrite(motorPin, LOW);
}
}

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/*
Arduino Starter Kit example
Project 10 - Zoetrope
This sketch is written to accompany Project 10 in the
Arduino Starter Kit
Parts required:
two 10 kilohm resistors
2 momentary pushbuttons
one 10 kilohm potentiometer
motor
9V battery
H-Bridge
Created 13 September 2012
by Scott Fitzgerald
Thanks to Federico Vanzati for improvements
http://arduino.cc/starterKit
This example code is part of the public domain
*/
const int controlPin1 = 2; // connected to pin 7 on the H-bridge
const int controlPin2 = 3; // connected to pin 2 on the H-bridge
const int enablePin = 9; // connected to pin 1 on the H-bridge
const int directionSwitchPin = 4; // connected to the switch for direction
const int onOffSwitchStateSwitchPin = 5; // connected to the switch for turning the motor on and off
const int potPin = A0; // connected to the potentiometer's output
// create some variables to hold values from your inputs
int onOffSwitchState = 0; // current state of the On/Off switch
int previousOnOffSwitchState = 0; // previous position of the on/off switch
int directionSwitchState = 0; // current state of the direction switch
int previousDirectionSwitchState = 0; // previous state of the direction switch
int motorEnabled = 0; // Turns the motor on/off
int motorSpeed = 0; // speed of the motor
int motorDirection = 1; // current direction of the motor
void setup(){
// intialize the inputs and outputs
pinMode(directionSwitchPin, INPUT);
pinMode(onOffSwitchStateSwitchPin, INPUT);
pinMode(controlPin1, OUTPUT);
pinMode(controlPin2, OUTPUT);
pinMode(enablePin, OUTPUT);
// pull the enable pin LOW to start
digitalWrite(enablePin, LOW);
}
void loop(){
// read the value of the on/off switch
onOffSwitchState = digitalRead(onOffSwitchStateSwitchPin);
delay(1);
// read the value of the direction switch
directionSwitchState = digitalRead(directionSwitchPin);
// read the value of the pot and divide by 4 to get
// a value that can be used for PWM
motorSpeed = analogRead(potPin)/4;
// if the on/off button changed state since the last loop()
if(onOffSwitchState != previousOnOffSwitchState){
// change the value of motorEnabled if pressed
if(onOffSwitchState == HIGH){
motorEnabled = !motorEnabled;
}
}
// if the direction button changed state since the last loop()
if (directionSwitchState != previousDirectionSwitchState) {
// change the value of motorDirection if pressed
if (directionSwitchState == HIGH) {
motorDirection = !motorDirection;
}
}
// change the direction the motor spins by talking
// to the control pins on the H-Bridge
if (motorDirection == 1) {
digitalWrite(controlPin1, HIGH);
digitalWrite(controlPin2, LOW);
}
else {
digitalWrite(controlPin1, LOW);
digitalWrite(controlPin2, HIGH);
}
// if the motor is supposed to be on
if (motorEnabled == 1) {
// PWM the enable pin to vary the speed
analogWrite(enablePin, motorSpeed);
}
else { // if the motor is not supposed to be on
//turn the motor off
analogWrite(enablePin, 0);
}
// save the current On/Offswitch state as the previous
previousDirectionSwitchState = directionSwitchState;
// save the current switch state as the previous
previousOnOffSwitchState = onOffSwitchState;
}

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/*
Arduino Starter Kit example
Project 11 - Crystal Ball
This sketch is written to accompany Project 11 in the
Arduino Starter Kit
Parts required:
220 ohm resistor
10 kilohm resistor
10 kilohm potentiometer
16x2 LCD screen
tilt switch
Created 13 September 2012
by Scott Fitzgerald
http://arduino.cc/starterKit
This example code is part of the public domain
*/
// 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);
// set up a constant for the tilt switchPin
const int switchPin = 6;
// variable to hold the value of the switchPin
int switchState = 0;
// variable to hold previous value of the switchpin
int prevSwitchState = 0;
// a variable to choose which reply from the crystal ball
int reply;
void setup() {
// set up the number of columns and rows on the LCD
lcd.begin(16, 2);
// set up the switch pin as an input
pinMode(switchPin,INPUT);
// Print a message to the LCD.
lcd.print("Ask the");
// set the cursor to column 0, line 1
// line 1 is the second row, since counting begins with 0
lcd.setCursor(0, 1);
// print to the second line
lcd.print("Crystal Ball!");
}
void loop() {
// check the status of the switch
switchState = digitalRead(switchPin);
// compare the switchState to its previous state
if (switchState != prevSwitchState) {
// if the state has changed from HIGH to LOW
// you know that the ball has been tilted from
// one direction to the other
if (switchState == LOW) {
// randomly chose a reply
reply = random(8);
// clean up the screen before printing a new reply
lcd.clear();
// set the cursor to column 0, line 0
lcd.setCursor(0, 0);
// print some text
lcd.print("the ball says:");
// move the cursor to the second line
lcd.setCursor(0, 1);
// choose a saying to print baed on the value in reply
switch(reply){
case 0:
lcd.print("Yes");
break;
case 1:
lcd.print("Most likely");
break;
case 2:
lcd.print("Certainly");
break;
case 3:
lcd.print("Outlook good");
break;
case 4:
lcd.print("Unsure");
break;
case 5:
lcd.print("Ask again");
break;
case 6:
lcd.print("Doubtful");
break;
case 7:
lcd.print("No");
break;
}
}
}
// save the current switch state as the last state
prevSwitchState = switchState;
}

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/*
Arduino Starter Kit example
Project 12 - Knock Lock
This sketch is written to accompany Project 12 in the
Arduino Starter Kit
Parts required:
1 Megohm resistor
10 kilohm resistor
three 220 ohm resistors
piezo
servo motor
push button
one red LED
one yellow LED
one green LED
100 uF capacitor
Created 18 September 2012
by Scott Fitzgerald
Thanks to Federico Vanzati for improvements
http://arduino.cc/starterKit
This example code is part of the public domain
*/
// import the library
#include <Servo.h>
// create an instance of the servo library
Servo myServo;
const int piezo = A0; // pin the piezo is attached to
const int switchPin = 2; // pin the switch is attached to
const int yellowLed = 3; // pin the yellow LED is attached to
const int greenLed = 4; // pin the green LED is attached to
const int redLed = 5; // pin the red LED is attached to
// variable for the piezo value
int knockVal;
// variable for the switch value
int switchVal;
// variables for the high and low limits of the knock value
const int quietKnock = 10;
const int loudKnock = 100;
// variable to indicate if locked or not
boolean locked = false;
// how many valid knocks you've received
int numberOfKnocks = 0;
void setup(){
// attach the servo to pin 9
myServo.attach(9);
// make the LED pins outputs
pinMode(yellowLed, OUTPUT);
pinMode(redLed, OUTPUT);
pinMode(greenLed, OUTPUT);
// set the switch pin as an input
pinMode(switchPin, INPUT);
// start serial communication for debugging
Serial.begin(9600);
// turn the green LED on
digitalWrite(greenLed, HIGH);
// move the servo to the unlocked position
myServo.write(0);
// print status to the serial monitor
Serial.println("the box is unlocked!");
}
void loop(){
// if the box is unlocked
if(locked == false){
// read the value of the switch pin
switchVal = digitalRead(switchPin);
// if the button is pressed, lock the box
if(switchVal == HIGH){
// set the locked variable to "true"
locked = true;
// change the status LEDs
digitalWrite(greenLed,LOW);
digitalWrite(redLed,HIGH);
// move the servo to the locked position
myServo.write(90);
// print out status
Serial.println("the box is locked!");
// wait for the servo to move into position
delay (1000);
}
}
// if the box is locked
if(locked == true){
// check the value of the piezo
knockVal = analogRead(piezo);
// if there are not enough valid knocks
if(numberOfKnocks < 3 && knockVal > 0){
// check to see if the knock is in range
if(checkForKnock(knockVal) == true){
// increment the number of valid knocks
numberOfKnocks++;
}
// print status of knocks
Serial.print(3 - numberOfKnocks);
Serial.println(" more knocks to go");
}
// if there are three knocks
if(numberOfKnocks >= 3){
// unlock the box
locked = false;
// move the servo to the unlocked position
myServo.write(0);
// wait for it to move
delay(20);
// change status LEDs
digitalWrite(greenLed,HIGH);
digitalWrite(redLed,LOW);
Serial.println("the box is unlocked!");
}
}
}
// this function checks to see if a
// detected knock is within max and min range
boolean checkForKnock(int value){
// if the value of the knock is greater than
// the minimum, and larger than the maximum
if(value > quietKnock && value < loudKnock){
// turn the status LED on
digitalWrite(yellowLed, HIGH);
delay(50);
digitalWrite(yellowLed, LOW);
// print out the status
Serial.print("Valid knock of value ");
Serial.println(value);
// return true
return true;
}
// if the knock is not within range
else {
// print status
Serial.print("Bad knock value ");
Serial.println(value);
// return false
return false;
}
}

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/*
Arduino Starter Kit example
Project 13 - Touch Sensor Lamp
This sketch is written to accompany Project 13 in the
Arduino Starter Kit
Parts required:
1 Megohm resistor
metal foil or copper mesh
220 ohm resistor
LED
Software required :
CapacitiveSensor library by Paul Badger
http://arduino.cc/playground/Main/CapacitiveSensor
Created 18 September 2012
by Scott Fitzgerald
http://arduino.cc/starterKit
This example code is part of the public domain
*/
// import the library (must be located in the
// Arduino/libraries directory)
#include <CapacitiveSensor.h>
// create an instance of the library
// pin 4 sends electrical energy
// pin 2 senses senses a change
CapacitiveSensor capSensor = CapacitiveSensor(4,2);
// threshold for turning the lamp on
int threshold = 1000;
// pin the LED is connected to
const int ledPin = 12;
void setup() {
// open a serial connection
Serial.begin(9600);
// set the LED pin as an output
pinMode(ledPin, OUTPUT);
}
void loop() {
// store the value reported by the sensor in a variable
long sensorValue = capSensor.capacitiveSensor(30);
// print out the sensor value
Serial.println(sensorValue);
// if the value is greater than the threshold
if(sensorValue > threshold) {
// turn the LED on
digitalWrite(ledPin, HIGH);
}
// if it's lower than the threshold
else {
// turn the LED off
digitalWrite(ledPin, LOW);
}
delay(10);
}

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/*
Arduino Starter Kit example
Project 14 - Tweak the Arduino Logo
This sketch is written to accompany Project 14 in the
Arduino Starter Kit
Parts required:
10 kilohm potentiometer
Software required :
Processing http://processing.org
Active internet connection
Created 18 September 2012
by Scott Fitzgerald
http://arduino.cc/starterKit
This example code is part of the public domain
*/
void setup() {
// initialize serial communication
Serial.begin(9600);
}
void loop() {
// read the value of A0, divide by 4 and
// send it as a byte over the serial connection
Serial.write(analogRead(A0)/4);
delay(1);
}
/* Processing code for this example
// Tweak the Arduno Logo
// by Scott Fitzgerald
// This example code is in the public domain
// import the serial library
import processing.serial.*;
// create an instance of the serial library
Serial myPort;
// create an instance of PImage
PImage logo;
// a variable to hold the background color
int bgcolor = 0;
void setup() {
// set the color mode to Hue/Saturation/Brightness
colorMode(HSB, 255);
// load the Arduino logo into the PImage instance
logo = loadImage("http://arduino.cc/en/pub/skins/arduinoWide/img/logo.png");
// make the window the same size as the image
size(logo.width, logo.height);
// print a list of available serial ports to the
// Processing staus window
println("Available serial ports:");
println(Serial.list());
// Tell the serial object the information it needs to communicate
// with the Arduno. Change Serial.list()[0] to the correct
// port corresponding to your Arduino board. The last
// parameter (e.g. 9600) is the speed of the communication. It
// has to correspond to the value passed to Serial.begin() in your
// Arduino sketch.
myPort = new Serial(this, Serial.list()[0], 9600);
// If you know the name of the port used by the Arduino board, you
// can specify it directly like this.
// port = new Serial(this, "COM1", 9600);
}
void draw() {
// if there is information in the serial port
if ( myPort.available() > 0) {
// read the value and store it in a variable
bgcolor = myPort.read();
// print the value to the status window
println(bgcolor);
}
// Draw the background. the variable bgcolor
// contains the Hue, determined by the value
// from the serial port
background(bgcolor, 255, 255);
// draw the Arduino logo
image(logo, 0, 0);
}
*/

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/*
Arduino Starter Kit example
Project 15 - Hacking Buttons
This sketch is written to accompany Project 15 in the
Arduino Starter Kit
Parts required:
batery powered component
220 ohm resistor
4N35 optocoupler
Created 18 September 2012
by Scott Fitzgerald
http://arduino.cc/starterKit
This example code is part of the public domain
*/
const int optoPin = 2; // the pin the optocoupler is connected to
void setup(){
// make the pin with the optocoupler an output
pinMode(optoPin, OUTPUT);
}
void loop(){
digitalWrite(optoPin, HIGH); // pull pin 2 HIGH, activating the optocoupler
delay(15); // give the optocoupler a moment to activate
digitalWrite(optoPin, LOW); // pull pin 2 low until you're ready to activate again
delay(21000); // wait for 21 seconds
}