# SENSOR PING))) QUESTION

I GOT A PING))) SENSOR YESTERDAY NOW I KNOW HOW DOES IT WORK BUT I NOW, I NEED TO KNOW WHAT SHOULD I DO, TO TURN ON AN LED OR MOTOR WHEN THE SENSOR REACHES IN THE MIDDLE OF TWO NUMBERS.

WHAT SHOULD I CHANGE IN THE CODE

IF YOU DONT REALLY UNDERSTAND WHAT I MEAN, POST A COMMENT

where is the code?

/* Ping))) Sensor

This sketch reads a PING))) ultrasonic rangefinder and returns the
distance to the closest object in range. To do this, it sends a pulse
to the sensor to initiate a reading, then listens for a pulse
to return. The length of the returning pulse is proportional to
the distance of the object from the sensor.

The circuit:

• +V connection of the PING))) attached to +5V
• GND connection of the PING))) attached to ground
• SIG connection of the PING))) attached to digital pin 7

created 3 Nov 2008
by David A. Mellis
modified 30 Jun 2009
by Tom Igoe

This example code is in the public domain.

*/

// this constant won’t change. It’s the pin number
// of the sensor’s output:
const int pingPin = 7;

void setup() {
// initialize serial communication:
Serial.begin(9600);
}

void loop()
{
// establish variables for duration of the ping,
// and the distance result in inches and centimeters:
long duration, inches, cm;

// The PING))) is triggered by a HIGH pulse of 2 or more microseconds.
// Give a short LOW pulse beforehand to ensure a clean HIGH pulse:
pinMode(pingPin, OUTPUT);
digitalWrite(pingPin, LOW);
delayMicroseconds(2);
digitalWrite(pingPin, HIGH);
delayMicroseconds(5);
digitalWrite(pingPin, LOW);

// The same pin is used to read the signal from the PING))): a HIGH
// pulse whose duration is the time (in microseconds) from the sending
// of the ping to the reception of its echo off of an object.
pinMode(pingPin, INPUT);
duration = pulseIn(pingPin, HIGH);

// convert the time into a distance
inches = microsecondsToInches(duration);
cm = microsecondsToCentimeters(duration);

Serial.print(inches);
Serial.print("in, ");
Serial.print(cm);
Serial.print(“cm”);
Serial.println();

delay(100);
}

long microsecondsToInches(long microseconds)
{
// According to Parallax’s datasheet for the PING))), there are
// 73.746 microseconds per inch (i.e. sound travels at 1130 feet per
// second). This gives the distance travelled by the ping, outbound
// and return, so we divide by 2 to get the distance of the obstacle.
// See: http://www.parallax.com/dl/docs/prod/acc/28015-PING-v1.3.pdf
return microseconds / 74 / 2;
}

long microsecondsToCentimeters(long microseconds)
{
// The speed of sound is 340 m/s or 29 microseconds per centimeter.
// The ping travels out and back, so to find the distance of the
// object we take half of the distance travelled.
return microseconds / 29 / 2;
}

if (cm > minDistance && cm < maxDistance){
//turn led on
}

@OP: Please don't shout, and when posting code, use the # icon on the toolbar to put the code into a code box.

but can you put this somewhere on the code and post it so its gonna be easy for me to understand

and then i will try it

it's easy, and i won't code for you, unless you pay me :grin:

because im a 13 years old beginner. and i really need help so that i will be able to make a robot.

and can a little part of code can be moved anywhere else and will it still work? :fearful:

ok, it's not working because of the cm or inche. :0 is there something else that can replace the cm or inche :relaxed:

Furlongs? What you have written doesn't make sense. Could you tell us what you think the problem is?

i think the problem is that my arduino uno cant read the cm and inches.i just need help for something that can replace the cm and inches

what i have written is:

/* Ping))) Sensor

This sketch reads a PING))) ultrasonic rangefinder and returns the distance to the closest object in range. To do this, it sends a pulse to the sensor to initiate a reading, then listens for a pulse to return. The length of the returning pulse is proportional to the distance of the object from the sensor.

The circuit: * +V connection of the PING))) attached to +5V * GND connection of the PING))) attached to ground * SIG connection of the PING))) attached to digital pin 7

http://www.arduino.cc/en/Tutorial/Ping

created 3 Nov 2008 by David A. Mellis modified 30 Jun 2009 by Tom Igoe

This example code is in the public domain.

*/

// this constant won't change. It's the pin number // of the sensor's output: const int pingPin = 7;

void setup() { pinMode (13,OUTPUT); Serial.begin(9600); }

void loop() { // establish variables for duration of the ping, // and the distance result in inches and centimeters: long duration, inches, cm;

// The PING))) is triggered by a HIGH pulse of 2 or more microseconds. // Give a short LOW pulse beforehand to ensure a clean HIGH pulse: pinMode(pingPin, OUTPUT); digitalWrite(pingPin, LOW); delayMicroseconds(2); digitalWrite(pingPin, HIGH); delayMicroseconds(5); digitalWrite(pingPin, LOW);

// The same pin is used to read the signal from the PING))): a HIGH // pulse whose duration is the time (in microseconds) from the sending // of the ping to the reception of its echo off of an object. pinMode(pingPin, INPUT); duration = pulseIn(pingPin, HIGH);

// convert the time into a distance inches = microsecondsToInches(duration); cm = microsecondsToCentimeters(duration);

Serial.print(inches); Serial.print("in, "); Serial.print(cm); Serial.print("cm"); Serial.println();

delay(100); }

long microsecondsToInches(long microseconds) { // According to Parallax's datasheet for the PING))), there are // 73.746 microseconds per inch (i.e. sound travels at 1130 feet per // second). This gives the distance travelled by the ping, outbound // and return, so we divide by 2 to get the distance of the obstacle. // See: http://www.parallax.com/dl/docs/prod/acc/28015-PING-v1.3.pdf return microseconds / 74 / 2; }

long microsecondsToCentimeters(long microseconds) { if ( pingPin,_______________ ) { digitalWrite(13,HIGH);

} else { digitalWrite(13,LOW); } // The speed of sound is 340 m/s or 29 microseconds per centimeter. // The ping travels out and back, so to find the distance of the // object we take half of the distance travelled. return microseconds / 29 / 2; }

Please back to your last post,click on "modify", then highlight the code, then click on the # icon on the editor's toolbar. Then click on "save".

i think the problem is that my arduino uno cant read the cm and inches

Well of course it can't.

/* Ping))) Sensor

This sketch reads a PING))) ultrasonic rangefinder and returns the distance to the closest object in range. To do this, it sends a pulse to the sensor to initiate a reading, then listens for a pulse to return. The length of the returning pulse is proportional to the distance of the object from the sensor.

The circuit: * +V connection of the PING))) attached to +5V * GND connection of the PING))) attached to ground * SIG connection of the PING))) attached to digital pin 7

http://www.arduino.cc/en/Tutorial/Ping

created 3 Nov 2008 by David A. Mellis modified 30 Jun 2009 by Tom Igoe

This example code is in the public domain.

*/

// this constant won't change. It's the pin number // of the sensor's output: const int pingPin = 7;

void setup() { pinMode (13,OUTPUT); Serial.begin(9600); }

void loop() { // establish variables for duration of the ping, // and the distance result in inches and centimeters: long duration, inches, cm;

// The PING))) is triggered by a HIGH pulse of 2 or more microseconds. // Give a short LOW pulse beforehand to ensure a clean HIGH pulse: pinMode(pingPin, OUTPUT); digitalWrite(pingPin, LOW); delayMicroseconds(2); digitalWrite(pingPin, HIGH); delayMicroseconds(5); digitalWrite(pingPin, LOW);

// The same pin is used to read the signal from the PING))): a HIGH // pulse whose duration is the time (in microseconds) from the sending // of the ping to the reception of its echo off of an object. pinMode(pingPin, INPUT); duration = pulseIn(pingPin, HIGH);

// convert the time into a distance inches = microsecondsToInches(duration); cm = microsecondsToCentimeters(duration);

Serial.print(inches); Serial.print("in, "); Serial.print(cm); Serial.print("cm"); Serial.println();

delay(100); }

long microsecondsToInches(long microseconds) { // According to Parallax's datasheet for the PING))), there are // 73.746 microseconds per inch (i.e. sound travels at 1130 feet per // second). This gives the distance travelled by the ping, outbound // and return, so we divide by 2 to get the distance of the obstacle. // See: http://www.parallax.com/dl/docs/prod/acc/28015-PING-v1.3.pdf return microseconds / 74 / 2; }

long microsecondsToCentimeters(long microseconds) {

if ( pingPin,_______________ ) { digitalWrite(13,HIGH);

} else { digitalWrite(13,LOW);

} // The speed of sound is 340 m/s or 29 microseconds per centimeter. // The ping travels out and back, so to find the distance of the // object we take half of the distance travelled. return microseconds / 29 / 2; }

doned

No, not the "quote" icon, the Code (#) icon. You can go back and modify old posts.

i think the problem is that my arduino uno cant read the cm and inches

Why do you think that?

well if ( pingPin,_______________ ) i don't know what does, but your arduino can read the ms of the ping, and can translate this time in cm/inches

with the first code (that was working, right?) you can read in the serial monitor the output (distance in inch and cm), take a look if this data is good.

yeah your right, :D but can you send and example of it, a little bit modified, so i will understand it clearly :relaxed:

``````if ( pingPin,_______________ )
``````

I don't understand what this is meant to signify. It doesn't look like C.

Please will you go back over your earlier posts, highlight the code, then click on the # icon. Then click "save". Get rid of any "quote" tags, except where quotes are intended.

THANK YOU LESTO, my PING))) SENSOR worked like a charm. :) :D :D :D :D :D