the pin numbers in the row[] and column[] arrays rows are the anodes cols are the cathodes --- Pin numbers: Matrix: * Digital pins 2 through 13, * analog pins 2 through 5 used as digital 16 through 19 Potentiometers: * center pins are attached to analog pins 0 and 1, respectively...
Connect two wires to the Arduino board. The black wire connects ground to one leg of the pushbutton. The second wire goes from digital pin 2 to the other leg of the pushbutton. 连接两根线到 Arduino 板子。黑线接地并连接到按钮开关一只脚。另外一根连接到数字针 2 并连接到按钮开关。 Pushbutton...
// Pin 13 has an LED connected on most Arduino boards. // give it a name: int led = 13; // the setup routine runs once when you press reset: void setup() { // initialize the digital pin as an output. pinMode(led, OUTPUT); } // the loop routine runs over and over again fo...
// initialize digital pin LED_BUILTIN as an output.//注释行,初始化数字引脚,定义它为输出针脚 pinMode(LED_BUILTIN, OUTPUT); //具体可以参考网站语法 //定义pinMode,LED_BUILTIN指板上的指示灯,当然我们可以指定其他针脚比如 2 } // the loop function runs over and over again forever ...
Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN is set to the correct LED pin independent of which board is used. If you want to know what pin the on-board LED is connected to ...
// initialize digital pin LED_BUILTIN as an output. pinMode(LED_BUILTIN, OUTPUT); } // the loop function runs over and over again forever void loop() { digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage ...
现在,当你打开Arduino IDE的串口监视器,你会看见“0”的数据流(如果开关打开)或者“1”的数据流(如果开关闭合) /* DigitalReadSerial Reads a digital input on pin 2, prints the result to the serial monitor This example code is in the public domain. ...
int steeringDirection = 0; // Left (0) and Right (1) 在设置中,我们使用pinmode()命令将这些引脚定义为输出,然后使用digitalWrite ()将它们设置为 0 伏。 void setup() { //other stuff... // Declare digital output pins: pinMode(controlPin1A, OUTPUT); // 1A pin...
这是一个抽象函数，其作用是向指定的数字量接口写入数据。在这个例子中，要写入的数字量接口是LED对应的管脚，写入的数据是目标状态，亮或灭。
digital input on pin 2 and prints the results to the serial monitor. The circuit: * Momentary switch attached from pin 2 to ground * Built-in LED on pin 13 Unlike pinMode(INPUT), there is no pull-down resistor necessary. An internal ...