激光传感器的使用

能实现无接触远距离测量、速度快、精度高、量程大、抗光、电干扰能力强，应用于各种长距离、大区域安防检测、工业自动化光电信号检测等。

 1 int lasersend = 2;
 2
 3 int laserrev = 3;
 4
 5 int revled = 13;
 6
 7 int val;
 8
 9 void setup() {
10
11   // put your setup code here, to run once:
12
13   pinMode(lasersend, OUTPUT);
14
15   pinMode(laserrev, INPUT);
16
17   pinMode(revled, OUTPUT);
18
19   digitalWrite(lasersend; HIGH);
20
21 }
22
23
24
25 void loop() {
26
27   // put your main code here, to run repeatedly:
28
29   val = digitalRead(laserrev);
30
31   if (val == HIGH)
32
33   {
34
35     digitalWrite(revled, HIGH);
36
37   }
38
39   else {
40
41     digitalWrite(revled, LOW);
42
43   }
44
45 }