Help with Servo Code

Projects Programming
1

So what im trying to do is get my servo to go from 0 to 90 when i press the button and stop. Then when i press it again it goes from 90 back to 0 then stop. basically every time i press the button it goes back and forth from 0 and 90.

Whats going on now is when i press the button it goes 0 to 90 but stays there and when i press the button again it jumps to 0 but then goes back to 90 again. Attached is the code im using and layout with a video.

Thank you for any help i can get with this.

1024×587 54.5 KB 

#include <Servo.h> 

// Set digital pin numbers:
const int servoPin = 8;  // The number of the Servo pin
const int buttonPin = 9;  // The number of the Pushbutton pin

int buttonState = 0;  // Variable for reading the pushbutton status
int directionState = 0;  // Variable for reading direction of the servo

Servo myservo;  // Create servo object to control a servo 

int pos = 0;  // Variable to store the servo position 

void setup() {
   myservo.attach(8);  // attaches the servo on pin 8 to the servo object 
   pinMode(buttonPin, INPUT);  // initialize the pushbutton pin as an input
 }

 void loop(){
   // read the state of the pushbutton value:
   buttonState = digitalRead(buttonPin);

   if (directionState == 0){
     //The button is pushed
     if (buttonState == HIGH) {
       directionState = 1;// The direction for the servo is clockwise

       // goes from 0 degrees to 90 degrees in steps of 1 degree
       for(pos = 0; pos < 90; pos=pos+1)
       {
         myservo.write(pos);  // tell servo to go to position in variable ‘pos’ 
         delay(15);  // waits 15ms for the servo to reach the position 
       }
     }

   } else if (directionState == 1) {
     // The button is pushed
     if (buttonState == HIGH) {
       directionState = 0;  // The direction for the servo is anti-clockwise 

       // goes from 90 degrees to 0 degrees in steps of 1 degree 
       // for (pos = 90; pos>=1; pos=pos–1)
       {
         myservo.write(pos);  // tell servo to go to position in variable ‘pos’ 
         delay(15);  // waits 15ms for the servo to reach the position 
       }
     }
   }
 }

Range_Finder.ino (1.59 KB)

Range Finder.jpg
Range Finder.jpg2580×1480 436 KB

4

Im not very good with coding. What would i need to do to make it just go back and forth. Where if i hit the button it goes to 90 then stops and when i hit it again it goes to 0 and stops?

6

i must be missing something. to me when i read the code it looks like it should be doing what i want it to do but its not. im not seeing the sweep part of it at all. im kind of a begginer at this.

8

So i made an adjustment to the code and it seems to be working. but now when i go to the 90deg position the servo vibrates like its still trying to turn even though its not. is that normal? when it goes back to 0 it stops.

#include <Servo.h> 

// Set digital pin numbers:
const int servoPin = 8;  // The number of the Servo pin
const int buttonPin = 9;  // The number of the Pushbutton pin

int buttonState = 0;  // Variable for reading the pushbutton status
int directionState = 0;  // Variable for reading direction of the servo

Servo myservo;  // Create servo object to control a servo 

int pos = 0;  // Variable to store the servo position 

void setup() {
   myservo.attach(8);  // attaches the servo on pin 8 to the servo object 
   pinMode(buttonPin, INPUT);  // initialize the pushbutton pin as an input
 }

 void loop(){
   // read the state of the pushbutton value:
   buttonState = digitalRead(buttonPin);

   if (directionState == 0){
     //The button is pushed
     if (buttonState == HIGH) {
       directionState = 1;// The direction for the servo is clockwise

       // goes from 0 degrees to 90 degrees in steps of 1 degree
       for(pos = 0; pos < 90; pos=pos+1)
       {
         myservo.write(pos);  // tell servo to go to position in variable ‘pos’ 
         delay(15);  // waits 15ms for the servo to reach the position 
       }
     }

   } else if (directionState == 1) {
     // The button is pushed
     if (buttonState == HIGH) {
       directionState = 0;  // The direction for the servo is anti-clockwise 

       // goes from 90 degrees to 0 degrees in steps of 1 degree 
      for (pos = 90; pos>=1; pos=pos-1)
       {
         myservo.write(pos);  // tell servo to go to position in variable ‘pos’ 
         delay(15);  // waits 15ms for the servo to reach the position 
       }
     }
   }
 }