思维导图Mind mappingArduino逻辑控制（一）：按键开关控制LED灯。Arduino Logic Control (1): Push button switch to control LED lights.首先打开Arduino IDE，依次选择文件，示例，Digital,DigitallnputPullup。将此程序上传到Arduino开发板上，可以发现在之前的示例中也一直有一个上拉电阻，但是在本次演示中，上拉...
pinMode(2, INPUT_PULLUP); pinMode(13, OUTPUT); } void loop() { //read the pushbutton value into a variable int sensorVal = digitalRead(2); //print out the value of the pushbutton Serial.println(sensorVal); // Keep in mind the pullup means the pushbutton's // logic is inverted...
输入上拉模式 arduino内部自带上拉电阻,所以我们要完成上面的操作,完全就可以把引脚设置成 输入上拉模式(INPUT_PULLUP)。 pinMode(pin,INPUT_PULLUP); 使用按钮控制LED 程序 boolean pushButton; void setup() { // put your setup code here, to run once: Serial.begin(9600); pinMode(2,INPUT_PULLUP);...
pinMode(Button2, INPUT_PULLUP); //按钮2引脚设置为输入上拉模式 } void loop() { // 读取输入引脚的值 boolean button1State = digitalRead(Button1); boolean button2State = digitalRead(Button2); // 打印结果到串口 Serial.print("button1:"); Serial.println(button1State); Serial.print("button2...
//configure pin 2 as an input and enable the internal pull-up resistor pinMode(2, INPUT_PULLUP); pinMode(13, OUTPUT); } void loop() { //read the pushbutton value into a variable int sensorVal = digitalRead(2); //print out the value of the pushbutton ...
pinMode(2, INPUT_PULLUP); pinMode(13, OUTPUT); } void loop() { //read the pushbutton value into a variable int sensorVal = digitalRead(2); //print out the value of the pushbutton Serial.println(sensorVal); // Keep in mind the pullup means the pushbutton's ...
Connecting the resistor to GND sets the push-button’s state to LOW (0). The resistor is known as a pull-down resistor. On the other hand, it would be a pull-up resistor if it was connected to the power supply. This would set the initial state to HIGH (1). To be sure our conn...
Button 按钮 Turns on and off a light emitting diode(LED) connected to digital pin 13, when pressing a pushbutton attached to pin 2. 点亮和熄灭连接到数字针脚 13 上的 LED, 当按下连接到针脚 2 上的按钮开关。 The circuit: 电路连接
This example shows how to play three songs from SD card by pressing a push button The circuit: * Push Button on pin 2 and 3 * Audio Out - pin 9 * SD card attached to SPI bus as follows: ** MOSI - pin 11 ** MISO - pin 12 ...
What is the Arduino INPUT_PULLUP option for the pinMode function? In this tutorial I will show you different examples, using an Arduino board and a simple push button, to explain what INPUT_PULLUP does, and how to use it in your Arduino programs. ...