Motor with sonar

So this week’s challenge was to build something that involved motors and sensors. I decided to make mine out of a servo and a sonar sensor. Here is the code...

#include <Servo.h> 
Servo servo1; 
long distance; 
long duration; 
int trigPin = 10; 
int echoPin = 9; 

void setup() { 
servo1.attach(8); 
pinMode(trigPin, OUTPUT); 
pinMode(echoPin, INPUT);
} 


void loop() { 
ultra(); 
servo1.write(0); 
if(distance <= 10){
 servo1.write(90); 
} 
} 

void ultra(){ 
digitalWrite(trigPin, LOW); 
delay(2); 
digitalWrite(trigPin, HIGH); 
delay(10); 
digitalWrite(trigPin, LOW); 
duration = pulseIn(echoPin, HIGH); 
distance = duration*0.034/2; 
} 

This challenge didn't seem to hard to program but I was swamped with other work that I had to do for my job so I was unable to build the circuit this week to actually test to see if it worked.  I think it should have but I will try it next week but since this is due today I thought that I would just publish this now and finish it later.  So stay tuned for an update when I actually get the chance to play with it and see if it will work.  I know that is where the real learning happens but I still did learn quite a bit.  I had to read up on how the sonar thing works and how to program it.  I hope I got it right but I guess we will see if that is correct.   I also learned the difference between the long and integer numbers.  I had to use a long number for the distance to the object and the duration variables. Well anyway stay tuned so see if the code and circuit actually work. 

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