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Projecte de moure un Servo motor a amb Arduino depenen de la distància d’un ultra so


Exercici 1 – Moure un Servo


Exercici 2  – Moure Servo amb bucle For


Exercici 3 – Ultra so i Serial


Exercici 4 – Ultra so i leds

Projecte de circuits :


Exercici 5 – Ultra so i Servo


Codi de l’ultra so:

// 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);
digitalWrite(pingPin, HIGH);
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);
// motor = map(cm, 40, 0, 0, 255)

//write servoAngle to the servo

prova = (2) * inches;

Serial.print(“in, “);


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:
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;