Ultrasonic basics

1#include <NewPing.h>
2  
3// Pins
4const int LED  = 8;
5const  int VCC  = 10;
6const int TRIG = 11;
7const int ECHO = 12;
8
9// Sonar Distance  x
10const int MAX_DISTANCE_CM = 200;
11const int LED_DISTANCE_CM = 7;
12
13NewPing  sonar (TRIG, ECHO, MAX_DISTANCE_CM);
14
15void setup() {
16  // Sonar VCC connected  to leg 10, so put there HIGH.
17  pinMode (VCC, OUTPUT);
18  digitalWrite (VCC,  HIGH);
19  
20  Serial.begin (9600);
21  delay (500);
22}
23
24void loop()  {
25  /*  Comments */
26  int dist = sonar.ping_cm();
27
28  Serial.println  ( dist );
29  
30  if (dist <= LED_DISTANCE_CM){
31    digitalWrite (LED, HIGH);  
32  }
33  else{
34    digitalWrite (LED, LOW);
35  }
36}
37

1#include <NewPing.h>
2  
3// Pins
4const int LED  = 8;
5const
6  int VCC  = 10;
7const int TRIG = 11;
8const int ECHO = 12;
9
10// Sonar Distance
11  x
12const int MAX_DISTANCE_CM = 200;
13const int LED_DISTANCE_CM = 7;
14
15NewPing
16  sonar (TRIG, ECHO, MAX_DISTANCE_CM);
17
18void setup() {
19  // Sonar VCC connected
20  to leg 10, so put there HIGH.
21  pinMode (VCC, OUTPUT);
22  digitalWrite (VCC,
23  HIGH);
24  
25  Serial.begin (9600);
26  delay (500);
27}
28
29void loop()
30  {
31  /*  Comments */
32  int dist = sonar.ping_cm();
33
34  Serial.println
35  ( dist );
36  
37  if (dist <= LED_DISTANCE_CM){
38    digitalWrite (LED, HIGH);
39  
40  }
41  else{
42    digitalWrite (LED, LOW);
43  }
44}
45