所以对已经设为INPUT的引脚digitalWrite为LOW，是没有任何效果的。
#include<Arduino.h>intled=LED_BUILTIN;intirDrvs[]={0,3,9};voidsetup(){// put your setup code here, to run once:pinMode(led,OUTPUT);pinMode(irDrvs[0],OUTPUT);pinMode(irDrvs[1],OUTPUT);pinMode(irDrvs[2],OUTPUT);}voidloop(){delay(100);digitalWrite(led,HIGH);digitalWrite(irDrvs[...
digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level) delay(1000); // wait for a second digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW delay(1000); // wait for a second } 程序的开头/*...到后面还有一个*/ /*...*/...
在Arduino UNO中,提供PWM功能的引脚为3、5、6、9、10、11。 当使用analogWrite() 函数时,指定引脚会通过高低电平的不断转换输出一个周期固定的方波,通过改变高低电平在每个周期中所占的比例(占空比),而得到近似输出不同的电压的效果。 需要注意的是,这里仅仅是得到了近似模拟值输出的效果,如果要输出真正的模拟值,...
如果引脚被设置为INPUT，digitalWrite()会激活输入引脚的上拉电阻。If the pin is configured as an ...
digitalWrite(led, HIGH); //turn the LED on(HIGH is the voltage level) delay(1000);//wait for a second digitalWrite(led, LOW); //turn the LED off by making the voltage LOW delay(1000);//wait for a second } 1. 2. 3. 4. ...
digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW delay(500); // wait for a second digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level) delay(500); // wait for a second ...
5、Dielectric voltage 耐电压:1 Minute at AC 250V 三、SWITCH CHARACTERISTICS 开关规格 1、Operating force 开关按压力:740±300gf 2、Contact resistance 接触阻抗:100mΩ Max 3、Rating power 额定功率:DC12V 50mA 四、ENDURANCE CHARACTERISTIC 耐久特性 ...
digitalWrite(Buzzer, HIGH); // 蜂鸣器响 } [/code] [code] /* 【Arduino】108种传感器模块系列实验(资料+代码+图形+仿真) 实验三十七:MQ-3酒精乙醇传感器模块(半导体式表面电阻控制型)之三 */ const int gasSensor = 0; void setup() { Serial.begin(9600); // sets the serial port to 9600 ...
digitalWrite(slaveSelectPin, LOW); 延迟(100); SPI.传输(LSB); SPI.传输(MSB); 延迟(100); // 将 SS 引脚拉高以取消选择芯片: digitalWrite(slaveSelectPin, HIGH); } 浮动read_current (void){ load_current = 0; for (int a = 0; a <平均值; a++){ ...