Sensor Ultrasônico HC-SR04 - Arquivo 001

Referência:
http://buildbot.com.br/blog/como-utilizar-o-sensor-ultrasonico-hc-sr04/
http://arduinobasics.blogspot.com.br/2012/11/arduinobasics-hc-sr04-ultrasonic-sensor.html

Lista de Materiais:
IDE Arduino 1.0.6
1x  Board Arduino UNO
1x  Protoboard 830 furos
1x  Cabo USB-A male to USB-B male 
1x  Conj. de fios jumper p/ protoboard
1x  Sensor ultrasônico HC-SR04

Montagem:

Firmware:
#include <Ultrasonic.h>
//*****************************************************************
float cmMsec, inMsec;
//*****************************************************************

#define PINO_TRG    4

#define PINO_ECHO 5
//*****************************************************************

Ultrasonic ultrasonic(PINO_TRG, PINO_ECHO);                                                           //*****************************************************************

void setup(){

  Serial.begin(9600);                                                            
}
//*****************************************************************

void loop(){

  long microsec = ultrasonic.timing();                                  
  cmMsec = ultrasonic.convert(microsec, Ultrasonic::CM);  
  inMsec = ultrasonic.convert(microsec, Ultrasonic::IN);

  Serial.print("Centimetros: ");
  Serial.print(cmMsec);
  Serial.print(" - Polegadas: ");
  Serial.println(inMsec);

  delay(1000);
}
//*****************************************************************

Download: Ultrasonic.h