对于Arduino，用pinMode将IO口设为OUTPUT的时候，其实IO的状态为“强推挽”，也就是说设为高电平时，IO口对电源正极的电阻比较小（强上拉），设为低电平时IO口对地的电阻也比较小（强下拉），这样IO口就具备了较强的驱动能力。其实也没有强到哪里去，大概几十毫安，能点亮LED而已。这里顺便提一下常见的51单片机
引脚（pin）是对芯片的外部物理接口的一个称呼，它是在不把这个物理接口投入到具体应用场合下的称呼。例...
以下是一个点灯示例程序。void setup() { // initialize digital pin PC13 as an output. pinMode(PC13, OUTPUT);}// the loop function runs over and over again forevervoid loop() { digitalWrite(PC13, HIGH); // turn the LED on (HIGH is the voltage level) delay(1000); // wai...
int ledPin = 9; // LED connected to digital pin 9 int analogPin = 3; // potentiometer connected to analog pin 3 int val = 0; // variable to store the read value void setup() { pinMode(ledPin, OUTPUT); // sets the pin as output } void loop() { val = analogRead(analogPin)...
Serial.begin(9600); } void loop() { int sensorValue = analogRead(A0); // equation for converting digital value from ADC into actual voltage level voltageInput = voltageRef - (resolution * sensorValue); Serial.println(voltageInput); delay(10); }...
Arduino library forMCP4728quad channel, 12-bit voltage output Digital-to-Analog Convertor with non-volatile memory and I2C compatible Serial Interface This library is highly inspired fromthis great work Usage #include<Wire.h>#include"MCP4728.h"MCP4728 dac;voidsetup() { Serial.begin(115200);//...
Void setup(){//initialize the digital pin as an output. pinMode(led, OUTPUT); } //the loop routine runs over and over again forever: void loop(){ digitalWrite(led, HIGH); //turn the LED on(HIGH is the voltage level) delay(1000);//wait for a second ...
5. 以下语句从作为 DAC 输出(MCP4725 DAC IC 的 OUTPUT 引脚)的 A1 读取模拟电压。该引脚也可以连接到万用表以检查输出电压。在此处了解如何使用万用表。 无符号 int 类比读取 = 类比读取(A1)*4 ; 6. 此外,变量analogread的电压值使用以下公式计算 ...
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. ...
// 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) ...