Arduino ja ultraheliandur

Lisan ühendamise skeemi ja kauguse mõõtmise koodi.

Originaali leiab http://arduinobasics.blogspot.com.ee/2012/11/arduinobasics-hc-sr04-ultrasonic-sensor.html

Ühendamise skeem

Kauguse mõõtmise kood: LED pin 13 on koodist välja märgitud!

/* HC-SR04 Ping distance sensor: VCC to arduino 5v GND to arduino GND Echo to Arduino pin 7 Trig to Arduino pin 6 This sketch originates from Virtualmix: http://goo.gl/kJ8Gl Has been modified by Winkle ink here: http://winkleink.blogspot.com.au/ 2012/05/arduino-hc-sr04-ultrasonic-distance.html And modified further by ScottC here: http://arduinobasics.blogspot.com.au/ 2012/11/arduinobasics-hc-sr04-ultrasonic-sensor.html on 10 Nov 2012. */ #define echoPin 7 // Echo Pin #define trigPin 6 // Trigger Pin //#define LEDPin 13 // Onboard LED int maximumRange = 200; // Maximum range needed int minimumRange = 0; // Minimum range needed long duration, distance; // Duration used to calculate distance void setup() { Serial.begin (9600); pinMode(trigPin, OUTPUT); pinMode(echoPin, INPUT); //pinMode(LEDPin, OUTPUT); // Use LED indicator (if required) } void loop() { /* The following trigPin/echoPin cycle is used to determine the distance of the nearest object by bouncing soundwaves off of it. */ digitalWrite(trigPin, LOW); delayMicroseconds(2); digitalWrite(trigPin, HIGH); delayMicroseconds(10); digitalWrite(trigPin, LOW); duration = pulseIn(echoPin, HIGH); //Calculate the distance (in cm) based on the speed of sound. distance = duration/58.2; if (distance >= maximumRange || distance <= minimumRange){ /* Send a negative number to computer and Turn LED ON to indicate "out of range" */ Serial.println("-1"); //digitalWrite(LEDPin, HIGH); } else { /* Send the distance to the computer using Serial protocol, and turn LED OFF to indicate successful reading. */ Serial.println(distance); //digitalWrite(LEDPin, LOW); }