第一个项目 12 号引脚点灯

xiefandaren

功能目标

点灯亮两秒 熄灭1秒 循环往复

接线图






原理图




硬件走线

Arduino IDE 代码

1. /*
   
2.   Blink
   
3. 
   
4.   Turns an LED on for one second, then off for one second, repeatedly.
   
5. 
   
6.   Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO
   
7.   it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN is set to
   
8.   the correct LED pin independent of which board is used.
   
9.   If you want to know what pin the on-board LED is connected to on your Arduino
   
10.   model, check the Technical Specs of your board at:
    
11.   https://www.arduino.cc/en/Main/Products
    
12. 
    
13.   modified 8 May 2014
    
14.   by Scott Fitzgerald
    
15.   modified 2 Sep 2016
    
16.   by Arturo Guadalupi
    
17.   modified 8 Sep 2016
    
18.   by Colby Newman
    
19. 
    
20.   This example code is in the public domain.
    
21. 
    
22.   https://www.arduino.cc/en/Tutorial/BuiltInExamples/Blink
    
23. */
    
24. 
    
25. // the setup function runs once when you press reset or power the board
    
26. 
    
27. int lightFoot=12;
    
28. 
    
29. void setup() {
    
30.   //初始化数字引脚LED_BUILTIN作为输出。
    
31. 
    
32.   pinMode(lightFoot, OUTPUT);
    
33.   Serial. begin(9600);
    
34.   //初始化串口通讯
    
35. }
    
36. 
    
37. // the loop function runs over and over again forever
    
38. void loop() {
    
39.   digitalWrite(lightFoot, HIGH);  // turn the LED on (HIGH is the voltage level)
    
40.   delay(2000);                      // wait for a second
    
41.   digitalWrite(lightFoot, LOW);   // turn the LED off by making the voltage LOW
    
42.   delay(1000);                      // wait for a second
    
43. }
    

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