Tags: ACS712, 30A, Hall, Current, Sensor, Module

Current Sensor 30A Hall Effect Module ACS712

  • 19.00 AED
    • Ex Tax:19.00 AED
    • Brands techmaze
    • Product Code: Digital
    • Availability: In Stock
    Reading Sensing and Controlling current flow is a requirements in a wide variety of application including, over-current protection circuits, switching mode, battery chargers, power supplies, digital watt meter and programmable current source, etc.. The ACS721 current reading module is based on ACS71..
    Reading Sensing and Controlling current flow is a requirements in a wide variety of application including,
    over-current protection circuits, switching mode, battery chargers, power supplies,
    digital watt meter and programmable current source, etc..
    The ACS721 current reading module is based on ACS712 Sensor which can detect AC, DC current signal accurately.
    This module is based on the ACS712ELC-30 chip. It operates at 5V and has an on-board power indicator. It can measure positive and negative 30 amps, corresponding to the analog output 66mV / A.

    Using Allegro ACS712 DC/AC Current sensor with Arduino Code

    Allegro ACS712 DC/AC Current sensor with Arduino Code

    In this page you will get the code for Allegro ACS712 DC/AC Current Sensor. Watch video instruction on how to use ACS712.

    Models and Current rating of Allegro ACS712 chip

    1. ACS712ELCTR-05B-T 5A current Sensor
    2. ACS712ELCTR-20B-T 20A current Sensor
    3. ACS712ELCTR-30B-T 30A current Sensor
    
     
    /*
     * 
     * Arduino Sketch for Allegro ACS712 Current Sensor 
     * this sensor can measure current at range of up to 30A
     * It operates with 5V
     * Please watch video instruction and explanation for this code.
     * 
     * Written by Ahmad Shamshiri on Sunday Jun 17, 2018 at 22:06 at Ajax, Ontario, Canada
     * for Robojax.com
     * View the video instruction at https://youtu.be/DVp9k3xu9IQ
     * This code has been downloaded from Robojax.com
     */
    #define VIN A0 // define the Arduino pin A0 as voltage input (V in)
    const float VCC   = 5.0;// supply voltage is from 4.5 to 5.5V. Normally 5V.
    const int model = 2;   // enter the model number (see below)
    
    float cutOffLimit = 1.01;// set the current which below that value, doesn't matter. Or set 0.5
    
    /*
              "ACS712ELCTR-05B-T",// for model use 0
              "ACS712ELCTR-20A-T",// for model use 1
              "ACS712ELCTR-30A-T"// for model use 2  
    sensitivity array is holding the sensitivy of the  ACS712
    current sensors. Do not change. All values are from page 5  of data sheet          
    */
    float sensitivity[] ={
              0.185,// for ACS712ELCTR-05B-T
              0.100,// for ACS712ELCTR-20A-T
              0.066// for ACS712ELCTR-30A-T
         
             }; 
    
    
    const float QOV =   0.5 * VCC;// set quiescent Output voltage of 0.5V
    float voltage;// internal variable for voltage
    
    void setup() {
        //Robojax.com ACS712 Current Sensor 
        Serial.begin(9600);// initialize serial monitor
        Serial.println("Robojax Tutorial");
        Serial.println("ACS712 Current Sensor");
    }
    
    void loop() {
      
    
      //Robojax.com ACS712 Current Sensor 
      float voltage_raw =   (5.0 / 1023.0)* analogRead(VIN);// Read the voltage from sensor
      voltage =  voltage_raw - QOV + 0.012 ;// 0.000 is a value to make voltage zero when there is no current
      float current = voltage / sensitivity[model];
     
      if(abs(current) > cutOffLimit ){
        Serial.print("V: ");
        Serial.print(voltage,3);// print voltage with 3 decimal places
        Serial.print("V, I: ");
        Serial.print(current,2); // print the current with 2 decimal places
        Serial.println("A");
      }else{
        Serial.println("No Current");
      }
      delay(500);
    } 

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