Circ 3 and 4

Circ -03: Motor

Circuit Picture:

Youtube:

Code:

/*     -----------------------------------------------------------
 *     |  Arduino Experimentation Kit Example Code               |
  *     |  CIRC-03 .: Spin Motor Spin :. (Transistor and Motor)   |
  *     -----------------------------------------------------------
 * 
  * The Arduinos pins are great for driving LEDs however if you hook 
  * up something that requires more power you will quickly break them.
  * To control bigger items we need the help of a transistor. 
  * Here we will use a transistor to control a small toy motor
  * 
  * http://tinyurl.com/d4wht7
  *
  */

 int motorPin = 9;  // define the pin the motor is connected to
                    // (if you use pin 9,10,11 or 3you can also control speed)

 /*
  * setup() - this function runs once when you turn your Arduino on
  * We set the motors pin to be an output (turning the pin high (+5v) or low (ground) (-))
  * rather than an input (checking whether a pin is high or low)
  */
 void setup()
 {
  pinMode(motorPin, OUTPUT); 
 }


 /*
  * loop() - this function will start after setup finishes and then repeat
  * we call a function called motorOnThenOff()
  */

 void loop()                     // run over and over again
 {
  motorOnThenOff();
  //motorOnThenOffWithSpeed();
  //motorAcceleration();
 }

 /*
  * motorOnThenOff() - turns motor on then off 
  * (notice this code is identical to the code we used for
  * the blinking LED)
  */
 void motorOnThenOff(){
   int onTime = 2500;  //the number of milliseconds for the motor to turn on for
   int offTime = 1000; //the number of milliseconds for the motor to turn off for
   
   digitalWrite(motorPin, HIGH); // turns the motor On
   delay(onTime);                // waits for onTime milliseconds
   digitalWrite(motorPin, LOW);  // turns the motor Off
   delay(offTime);               // waits for offTime milliseconds
 }

 /*
  * motorOnThenOffWithSpeed() - turns motor on then off but uses speed values as well 
  * (notice this code is identical to the code we used for
  * the blinking LED)
  */
 void motorOnThenOffWithSpeed(){
   
   int onSpeed = 200;  // a number between 0 (stopped) and 255 (full speed) 
   int onTime = 2500;  //the number of milliseconds for the motor to turn on for
   
   int offSpeed = 50;  // a number between 0 (stopped) and 255 (full speed) 
   int offTime = 1000; //the number of milliseconds for the motor to turn off for
   
   analogWrite(motorPin, onSpeed);   // turns the motor On
   delay(onTime);                    // waits for onTime milliseconds
   analogWrite(motorPin, offSpeed);  // turns the motor Off
   delay(offTime);                   // waits for offTime milliseconds
 }

 /*
  * motorAcceleration() - accelerates the motor to full speed then
  * back down to zero
 */
 void motorAcceleration(){
   int delayTime = 50; //milliseconds between each speed step
   
   //Accelerates the motor
   for(int i = 0; i < 256; i++){ //goes through each speed from 0 to 255
     analogWrite(motorPin, i);   //sets the new speed
     delay(delayTime);           // waits for delayTime milliseconds
   }
   
   //Decelerates the motor
   for(int i = 255; i >= 0; i--){ //goes through each speed from 255 to 0
     analogWrite(motorPin, i);   //sets the new speed
     delay(delayTime);           // waits for delayTime milliseconds
   }
 }

Circ – 04: The Micro Servo

Circuit Diagram:

Youtube:

Code:

// Sweep
 // by BARRAGAN  

 #include  
  
 Servo myservo;  // create servo object to control a servo 
                 // a maximum of eight servo objects can be created 
  
 int pos = 0;    // variable to store the servo position 
  
 void setup() 
 { 
   myservo.attach(9);  // attaches the servo on pin 9 to the servo object 
 } 
  
  
 void loop() 
 { 
   for(pos = 0; pos < 180; pos += 1)  // goes from 0 degrees to 180 degrees 
   {                                  // in steps of 1 degree 
     myservo.write(pos);              // tell servo to go to position in variable 'pos' 
     delay(15);                       // waits 15ms for the servo to reach the position 
   } 
   for(pos = 180; pos>=1; pos-=1)     // goes from 180 degrees to 0 degrees 
   {                                
     myservo.write(pos);              // tell servo to go to position in variable 'pos' 
     delay(15);                       // waits 15ms for the servo to reach the position 
   } 
 }