Sensor + Servo Machine (NEED HELP)

[ballinwcode]

I'm trying to make a machine using sensors and a servo. Everything's perfectly fine but my servo isn't moving. Can anyone tell me why?

#include <LiquidCrystal.h> // includes the LiquidCrystal Library
#include <Servo.h>
LiquidCrystal lcd(1, 2, 4, 5, 6, 7); // Creates an LCD object. Parameters: (rs, enable, d4, d5, d6, d7)
Servo myservo;
const int led = 0;
const int trigPin = 9;
const int echoPin = 10;
long duration;
int distanceCm, distanceInch;
int noteduration = 500;
void setup() {
lcd.begin(16,2); // Initializes the interface to the LCD screen, and specifies the dimensions (width and height) of the display
pinMode(trigPin, OUTPUT);
pinMode(led, OUTPUT);
pinMode(echoPin, INPUT);
myservo.attach(11);
myservo.write(0);
}
void loop() {
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distanceCm= duration*0.034/2;
distanceInch = duration*0.0133/2;
lcd.setCursor(0,0); // Sets the location at which subsequent text written to the LCD will be displayed
lcd.print("Put Hand Under "); // Prints string "Distance" on the LCD
delay(10);
lcd.setCursor(0,1);
lcd.print("Arrow ");
delay(10);
if (distanceInch<5)
{
  delay(500);
  digitalWrite(led, HIGH);
  delay(1000);
  myservo.write(200);
}
else {
    digitalWrite(led, LOW);
    myservo.write(0);
}
}

[szakaria]

The delay in your loop is too short to see the servo working.

[GolamMostafa]

@ballinwcode

myservo.write(200);

1. You need to declare the following global variables as floats:

float distanceCm, distanceInch;

2. Try the above quoted code with the following parameter and see if Servo moves.

myservo.write(150);

3. If the Servo still does not move, try by putting the following code above the if()...

distnaceInch = 4.15;    //test purpose
if (distanceInch<5.0)
{
  delay(500);
  digitalWrite(led, HIGH);
  delay(1000);
  myservo.write(150);
}

[MicroBahner]

@ballinwcode

  myservo.write(200);

That does not make sense. Angle values are limited to 0...180.
Please provide a link to the servo you are using. Especially digital servos ignore pulse values out of their limits.

[TomGeorge]

Hi,
What are your sensors?
If you are using the ultrasonic sensor, try using NewPing library to do your ultrasonic sensor work/calcs.
Also in the IDE press CTRL and T keys to auto format your code to make it easier to read.

Thanks.. Tom..

[ballinwcode]

apparently my servos are just broken. Thanks for the help though!