Arduino Smart Car-LED (20180504 Training Course--Huaqing Vision)

1. Arduino LED hardware connection

• Arduino has a programmable LED light, the corresponding pin number is  13 , please refer to the hardware schematic diagram for details. 
  

2. Arduino LED programming

• step 1: Set pin 13 as  output  function, the specific programming is as follows:

1. #define LED_PIN 13
2. void setup() {
3. // put your setup code here, to run once:
4. pinMode(LED_PIN,OUTPUT); //设置引脚 13 为输出功能
5. }

• step 2 : Add the following code to the loop function:

1. digitalWrite(LED_PIN,HIGH);//输出高电平,则LED灯亮
2. delay(1000);
3. digitalWrite(LED_PIN,LOW);//输出低电平,则LED灯灭
4. delay(1000);