EmergingObjects_4_2.ino

/*
 *             EMERGING OBJECTS 
 *             CLASS 4 / PART 2
*                                         +-----+ 
 *                                         | +-+ | 
 *                                   TOUCH | | | | 
 *                                   SENSOR| +---+ 
 *                                         +-----+ 
 *                 ARDUINO                       | 
 *              +-----------+                    | 
 *              |        GND|-----------------+  | 
 *              |           |                 |  | 
 *              |         13|-[R220]--[LED>]--O  | 
 *              |         12|                 |  | 
 *              |        ~11|-[R220]--[LED>]--+  | 
 *              |        ~10|                    | 
 *  +--[PHOTO]--|5V       ~9|                    | 
 *  |           |GND       8|                    | 
 *  O---[R10K]--|GND       7|                    | 
 *  |           |         ~6|                    | 
 *  +-----------|A0       ~5|                    | 
 *              |A1        4|----[R1M]-----------O 
 *              |A2       ~3|                    | 
 *              |A3        2|--------------------+ 
 *              |A4        1|                      
 *              +-----------+                      
 *                                                               
 */



// Setup the touch sensor.
#include <CapacitiveSensor.h>
CapacitiveSensor   cs_4_2 = CapacitiveSensor(4,2); 

// Setup the light sensor
int sensorPin = A0; 
int sensorValue = 0;
boolean dark = false;

// Set up the LEDs
int debugLed = 13;
int Led0 = 11;

// Set up the fading
byte fade;

// Set up the blinking
long previousMillis = 0; 
boolean blinkLedState = LOW;
long interval = 1000;           // interval at which to blink (milliseconds)

void setup() {                
  pinMode(debugLed, OUTPUT);   
  pinMode(Led0, OUTPUT);   
  Serial.begin(9600); 
}

void loop() {
  // Light Sensor Section 
  lightSense();
  //Check the touch sensor
  touchSense();
  // blink LED section
  blinkLED();
  // Light LEDs Section
  displayRoutine();
}


void touchSense(){
  long start = millis();
  long total1 =  cs_4_2.capacitiveSensor(30);
  /*
  Serial.print(millis() - start);        // check on performance in milliseconds
   Serial.print("\t");                    // tab character for debug windown spacing
   Serial.println(total1);                  // print sensor output 1
   delay(10);                             // arbitrary delay to limit data to serial port
   */
}


void lightSense(){
  sensorValue = analogRead(sensorPin);   
  if ( sensorValue <= 400 ) {
    dark = true; 
  } 
  else {
    dark = false;
  }
}


void blinkLED(){
  //Blink section
  // check to see if it's time to blink the LED; that is, if the 
  // difference between the current time and last time you blinked 
  // the LED is bigger than the interval at which you want to 
  // blink the LED.
  unsigned long currentMillis = millis();

  if(currentMillis - previousMillis > sensorValue/4) {
    // save the last time you blinked the LED 
    previousMillis = currentMillis;   

    // if the LED is off turn it on and vice-versa:
    blinkLedState = !blinkLedState;
  }
}

void displayRoutine(){
  digitalWrite(debugLed, blinkLedState);   // turn the LED on or off
  analogWrite(Led0,  fade);
  /*
  Serial.print("timer= ");
   Serial.print(timer);
   Serial.print("\t previousTimer= ") ; 
   Serial.print(previousTimer);
   Serial.print("\t fade= ");
   Serial.println(fade);
   */
}