如何使用Arduino设计延时继电器?

ID:204072 · 发表于 2024-8-30 18:42

如题，求大侠！

ID:444392 · 发表于 2024-8-31 10:26

简单程序直接用等待语句，复杂场合用中断？

ID:155507 · 发表于 2024-8-31 12:50

给你个参考。

int led_pin = 18;
int relay_pin = 12;
int sensor_pin = 4;

bool detected = false;
bool stop_relay = false;
unsigned long motion_stopped_time = 0; //will track the elapsed time after the motion stop

void setup() {
  pinMode(led_pin, OUTPUT);
  pinMode(relay_pin, OUTPUT);
  pinMode(sensor_pin, INPUT_PULLUP);
  Serial.begin(9600);
}

void loop(){

  if(digitalRead(sensor_pin) == HIGH){ //the sensor has detected motion

      //enclose the code here so it only executes once when motion is detected
      if(detected == false){
         Serial.println("Motion detected!");
         detected = true;

         digitalWrite(led_pin, HIGH); //turn led on
         digitalWrite(relay_pin, HIGH); //switch the relay on

      }

  }else{ //the sensor has stopped detecting motion

   if(detected == true){ //execute this only once when motion stops
         Serial.println("Motion stopped!");
         detected = false;

         digitalWrite(led_pin, LOW); //turn the led off

         motion_stopped_time = millis(); //remember the current time
         stop_relay = true;

   }else{
      if(stop_relay == true){ // ensures that this block will only execute once after the delay timer logic below

         //the current millis() time is 60sec more than the remembered time when the motion stopped
         if(millis() - motion_stopped_time >= 60000){
            digitalWrite(relay_pin, LOW); //switch the relay off
            stop_relay = false;
         }

      }
   }
  }
}

ID:291549 · 发表于 2024-8-31 14:18

1、输入定时延时函数数值。2、为了模拟，输出为13，板子上面有LED观察，可改为其它引脚为继电器输出。
3、2、3设定为定时开始和停止按键。
由于要求未说明白，本例使用MsTimer2定时器和硬件中断，以提高稳定性。

#include <MsTimer2.h>
// 设定各类函数，定时、开始、停止、执行
volatile int atime;
volatile boolean start;
volatile boolean stop;
volatile boolean led;
void msTimer2_func() {
start = start;
digitalWrite(13,start);
}
void attachInterrupt_fun_RISING_2() {
// MsTime2定时器
MsTimer2::set(atime, msTimer2_func);
MsTimer2::start();
}
void attachInterrupt_fun_RISING_3() {
MsTimer2::stop();
digitalWrite(13,stop);
}
void setup(){
atime = 5000;//定时时间设定
start = true;
stop = false;
led = true;
pinMode(2, INPUT_PULLUP);
pinMode(13, OUTPUT);//执行输出
pinMode(3, INPUT_PULLUP);
interrupts();// 硬件中断，2、3接开始和停止按钮
attachInterrupt(digitalPinToInterrupt(2),attachInterrupt_fun_RISING_2,RISING);
attachInterrupt(digitalPinToInterrupt(3),attachInterrupt_fun_RISING_3,RISING);
}
void loop(){
}

复制代码

看能否适用这个要求。
[color=rgba(0, 0, 0, 0.85)]

ID:204072 · 发表于 2024-9-2 22:04

感谢前辈指点！的确没有描述清楚，奉上原理图及时序图。烦请指点，谢谢！
如图，按钮AN按下后，D2、D3点亮，D4保持熄灭；按钮松开，开始延时，D2熄灭，D3延时后熄灭，D4点亮；延时结束后全部熄灭。
无标题.jpg

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