2、数字输入上拉 DigitalInputPullup - 输出上拉串口 InputPullupSerial This example demonstrates the use of INPUT_PULLUP with pinMode(). It monitors the state of a switch by establishingserial communicationbetween your Arduino and your computer over USB. 本例演示如何使用 pinMode 和 INPUT_PULLUP。
digital input 数字电路 按键 分类:Arduino 今天我们借助一个按键开关来聊一下有关Arduino“数字写入”的问题,众所周知开关就是可以控制某段电路断开或接通的元件,但是怎么能通过一个按键开关控制Arduino某一数字接口的电位呢?让我们来用按键连接一个正逻辑电路(如下图),10K电阻接地,按键开关连接+5V,公共端与Arduino...
TheanalogRead()command converts the input voltage range, 0 to 5 volts, to a digital value between 0 and 1023. This is done by a circuit inside the microcontroller called ananalog-to-digital converterorADC. 模拟读 analogRead 命令将输入电压 0 至 5 伏特转换到数字值域,从 0 至 1023.这是通过...
积分型ADC(https://en.wikipedia.org/wiki/Integrating_ADC),并行比较型ADC(https://en.wikipedia.org/wiki/Flash_ADC),压频转换型ADC(https://www.asdlib.org/onlineArticles/elabware/Scheeline_ADC/ADC_visual/voltage1.html)、∑-Δ型ADC(https://en.wikipedia.org/wiki/Delta-sigma_modulation)和...
The following Arduino PWM code sample reduces the voltage and average current output of pin 11:void setup() { pinMode(11, OUTPUT); analogWrite(11, 127); //Operates at a reduced voltage and current. } I connected a small LED to pin 11 to see the results of the above PWM code sample...
input pull-up (INPUT_PULLUP) mode, do not connect the pin to negative voltage or voltages higher than 5V, as this may damage the Arduino controller.由此可见在Arduino上拉模式下，我们无需给Arduino外接上一个上拉电阻，Aduino内部的上拉电阻将会起作用，之前需要上拉电阻是因为我们将引脚设置为INPUT...
It is the input voltage supplied to the board which ranges from 7V to 20V. The voltage provided by the power jack can be accessed through this pin. However, the output voltage through this pin to the board will be automatically set up to 5V. ...
37款传感器与执行器的提法,在网络上广泛流传,其实Arduino能够兼容的传感器模块肯定是不止这37种的。鉴于本人手头积累了一些传感器和执行器模块,依照实践出真知(一定要动手做)的理念,以学习和交流为目的,这里准备逐一动手尝试系列实验,不管成功(程序走通)与否,都会记录下来—小小的进步或是搞不掂的问题,希望能够抛砖引...
Digital I/O: 0至53号引脚 使用pinMode(), digitalWrite(), anddigitalRead() 函数,每一个IO都可以作为输入输出端口。他们工作在3.3V。每一个IO都可以输出 3 mA 或者 15 mA电流,或者输入6 mA 或者 9 mA电流。他们也都有100K 欧 的内部上拉电阻 (默认状态下不上拉)。另外,一些引脚有特殊功能: ...
// 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 level) delay(1000); // wait for a second digitalWrite...