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Crowtail- Relay
Crowtail- Relay

Crowtail- Relay

 The Relay is the most common used module in actually application such as home automation, and sometimes you need to control large current such as the air conditioning/water heater. That is what this Large Current Relay Module can b... جزئیات بیشتر »

تولید کننده: Elecrow
مدل کالا: ELEC0023
موجودی: 18
قیمت: 8,600تومان

Crowtail- Relay

 The Relay is the most common used module in actually application such as home automation, and sometimes you need to control large current such as the air conditioning/water heater. That is what this Large Current Relay Module can be help.

    This Large Current Relay Module is a high quality Single Pole Souble Throw Relay(SPST). When the relay not triggered, the 2 outputs is disconnected; when the relay triggered(Logic Low), the 2 outputs connected, the max current can be up to 30A@240VAC or 30A@30VDC, which would be enough for most of the home appliances.

Specification

  • Control Voltage: 5V
  • Nominal Current: 185mA

Part List

  • 1 X Crowtail- Relay 
  • 1 X Crowtail 3 Pin Cable

Wiki & External links

 

Features

  • High Switching Current

Specification

Parameter Description
Operating Voltage 5V
Operating Current 90mA
Relay Life 100,000 Cycle
Max Switching Voltage 120VAC/24VDC
Max Switching Current 3A

Usage

Intelligent Temperature Control Fan

1.Hardware Connection

2.Copy the demo code to your sketch, then upload to Arduino or Crowduino board.You can set a threshold temperature value to control the realy ON or OFF, then control the fan work or not.

/*
Temperature sensor connect to AO
Relay connetct to D5
*/

#include <math.h>
int a;
float temperature;
int B=3975;                  //B value of the thermistor
float resistance;
// Connect the Relay to digital pin D5.
// give it a name:
int Relay = 5;

void setup()
{
 // initialize the digital pin as an output.
 pinMode(Relay, OUTPUT);  
 Serial.begin(9600);  
}

void loop()
{
   a=analogRead(0);
   resistance=(float)(1023-a)*10000/a; //get the resistance of the sensor;
   temperature=1/(log(resistance/10000)/B+1/298.15)-273.15;//convert to temperature via datasheet ;
   delay(1000);
   Serial.print("Current temperature is ");
   Serial.println(temperature);
   if(temperature>20)
   {
         digitalWrite(Relay, HIGH);  //if temperature >20 degree,turn the Relay on,fan working
   }
   else
   {
        digitalWrite(Relay, LOW);//if temperature <=20 degree,turn the Relay off,fan not working
   }
}

3.When the temperature above 20 degrees,the fan will working.

 

Resource

 

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