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Sensor Technology Tasks

Arduino and Servos

To cover:

• Using servos with the Arduino
• Make video connecting Arduino to a servo
• Solenoids
• http://lemurbots.org/
• Pat Metheny and Robots
• Lemur videos

About Servos

Example 1

// Sweep
// by BARRAGAN  
// additions by rhoadley
// servo red to 5v, black to ground, yellow to digital pin 9;

#include <Servo.h> 
 
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 
int pos2 = random(180);
 
void setup() 
{ 
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object 
} 
 
void loop() 
{ 
  pos2 = random(18);
  for(pos = 0; pos < pos2; pos += 1)  // goes from 0 degrees to a random variation of 18 degrees - play with this! 
  {                                  // in steps of 1 degree 
    myservo.write(pos);              // tell servo to go to position in variable 'pos' 
    delay(random(20));               // wait a random time for the servo to reach the position 
  } 
  for(pos2; pos>=1; pos-=1)     // goes fromthe previous position to 0 degrees 
  {                                
    myservo.write(pos);         // tell servo to go to position in variable 'pos' 
    delay(random(20));          // waits a random time for the servo to reach the position 
  } 
} 

Example 2

// Sweep
// by BARRAGAN  
// additions by rhoadley
// servo red to 5v, black to ground, yellow to digital pin 9;

#include <Servo.h> 
 
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 < 45; pos += 1)  // goes from 0 degrees to 45 degrees 
  {                                  // in steps of 1 degree 
    myservo.write(pos);              // tell servo to go to position in variable 'pos' 
    delay(5);                       // waits 5ms for the servo to reach the position 
  } 
  for(pos = 45; pos>=1; pos-=1)     // goes from 45 degrees to 0 degrees 
  {                                
    myservo.write(pos);              // tell servo to go to position in variable 'pos' 
    delay(1);                       // waits 1ms for the servo to reach the position 
  } 
} 

Example 3

// Sweep
// by BARRAGAN  
// additions by rhoadley
// servo red to 5v, black to ground, yellow to digital pin 9;

#include <Servo.h> 
 
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 
  Serial.begin(9600);
} 
 
 
void loop() 
{ 
  for(pos = 0; pos < 45; pos += 1)  // goes from 0 degrees to 45 degrees 
  {                                  // in steps of 1 degree 
    myservo.write(pos);              // tell servo to go to position in variable 'pos' 
    delay(5);                       // waits 15ms for the servo to reach the position 
  } 
 
  // Here we add a rhythm, choosing a delay if a random condition is met...
  if (random(100) < 50)
      { 
        Serial.println("200");
        delay(200); 
      }
    else
      { 
        Serial.println("1");
        delay(1); 
      }
  
  for(pos = 45; pos>=1; pos-=1)     // goes from 45 degrees to 0 degrees 
  {                                 
    myservo.write(pos);              // tell servo to go to position in variable 'pos' 
    delay(1);                       // waits 15ms for the servo to reach the position 
    
  } 
  

} 

Example 4

// Two Servos
// by BARRAGAN  
// additions by rhoadley
// servo red to 5v, black to ground, yellow to digital pins 9 and 10;

#include <Servo.h> 
 
Servo myservo;  // create servo object to control a servo 
Servo myservo2;   // a maximum of eight servo objects can be created 
 
int pos = 0;    // variable to store the servo position 
int pos2 = 0;
 
void setup() 
{ 
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object 
  myservo2.attach(10); 
  Serial.begin(9600);
} 
 
 
void loop() 
{ 
  for(pos = 0; pos < 45; pos += 1)  // goes from 0 degrees to 45 degrees 
  {                                  // in steps of 1 degree 
    myservo.write(pos);              // tell servo to go to position in variable 'pos' 
    delay(5);                       // waits 15ms for the servo to reach the position 
  } 
 
  // Here we add a rhythm, choosing a delay if a random condition is met...
  if (random(100) < 50)
      { 
        Serial.println("200");
        delay(200); 
      }
    else
      { 
        Serial.println("1");
        delay(1); 
      }
  
  // second servo
  for(pos2 = 45; pos2>=1; pos2-=1)     // goes from 45 degrees to 0 degrees 
  {                                 
    myservo2.write(pos2);              // tell servo to go to position in variable 'pos' 
    delay(1);                       // waits 15ms for the servo to reach the position 
  } 
    for(pos2 = 0; pos2 < 180; pos2 += 1)  // goes from 0 degrees to 180 degrees 
  {                                  // in steps of 1 degree 
    myservo2.write(pos2);              // tell servo to go to position in variable 'pos' 
    delay(15);                       // waits 15ms for the servo to reach the position 
  } 
  for(pos2 = 180; pos2>=1; pos2-=1)     // goes from 180 degrees to 0 degrees 
  {                                
    myservo2.write(pos2);              // tell servo to go to position in variable 'pos' 
    delay(15);                       // waits 15ms for the servo to reach the position 
  } 

}