Yadda ake Amfani da Allegro ACS758 Sensor na Wutar Lantarki tare da Arduino don 50A zuwa 200A

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Yadda ake Amfani da Allegro ACS758 Sensor na Wutar Lantarki tare da Arduino don 50A zuwa 200A

Auna ma'auni a cikin aikace-aikacen da ke da ƙarfin gaske na iya zama mai wahala, amma firikwensin halin yanzu na Allegro ACS758 yana sauƙaƙa wannan aiki. Wannan firikwensin na iya ɗaukar matakan halin yanzu daga 50A zuwa 200A, yana ba da ingantaccen mafita ga ayyuka daban-daban. A cikin wannan koyaswar, za mu bincika yadda ake haɗa ACS758 zuwa Arduino da karanta ƙimar halin yanzu daidai.

ACS758-sensor-0

Sakamakon wannan aikin shine ikon auna halin yanzu da ke gudana ta hanyar kaya, yana nuna sakamakon akan serial monitor. ACS758 yana amfani da fasahar ji na Hall effect don canza halin yanzu zuwa wutar lantarki mai daidaitawa wanda Arduino zai iya karantawa, yana ba da damar sauƙin sa ido kan matakan halin yanzu. Tabbatar duba bidiyon don ƙarin fahimta (a cikin bidiyo a 01:15).

Bayanin Kayan Aiki

Babban ɓangaren wannan aikin shine firikwensin halin yanzu na Allegro ACS758. Wannan firikwensin yana aiki bisa ka'idar Hall effect, wanda ke ba shi damar auna filin maganadisu da halin yanzu ke haifarwa yayin gudana ta hanyar madugu. Yana samar da ƙarfin fitarwa daidai da halin yanzu, yana ba Arduino damar karantawa da fassara waɗannan ƙimar. ACS758 yana da nau'ikan iri daban-daban, tare da "100B" yana nuna cewa yana iya auna har zuwa 100A. Yana da ma'aunin halin yanzu na bi-directional, yana ba da damar ingantaccen karatu ba tare da la'akari da alkiblar halin yanzu ba. Firikwensin yana buƙatar samar da wutar lantarki na 3.3V ko 5V, wanda ke kunna kewayen ciki, gami da amplifier na aiki wanda ke sarrafa siginar Hall effect.

Cikakkun Bayanai na Datasheet

Mai Ƙirƙira	Allegro Microsystems
Lambar ɓangare	ACS758LCB-100B
Ƙarfin Logic/IO	3.3 V / 5 V
Ƙarfin samarwa	4.5 V - 5.5 V
Ƙarfin fitarwa (kowane tashar)	100 A
Ƙarfin kololuwa (kowane tashar)	200 A
Jagorar mitar PWM	Babu
Ƙofofin shigar da logic	Ya dace da TTL
Ragewar ƙarfin / R_DS(on) / saturation	0.1 V @ 100 A
Iyakokin zafi	Yanayin aiki: -40 °C zuwa 125 °C
Kunshin	Kunshin 5-pin
Bayanan kula / nau'ikan	Akwai a cikin ƙimar halin yanzu daban-daban (50A, 100A, 150A, 200A)

Tabbatar da ingantaccen waya don guje wa ragewar ƙarfin saboda juriya.
Yi amfani da waya mai girman da ya dace don aikace-aikacen halin yanzu mai girma don hana zafi mai yawa.
Kiyaye firikwensin a cikin iyakokin zafin da aka ƙayyade don ingantaccen karatu.
Daidaita ƙarfin fitarwa na firikwensin bisa ga takamaiman samfurin da aka yi amfani da shi.
Yi la'akari da amfani da capacitors na tacewa don daidaita karatu idan ya cancanta.

Umarnin Waya

Arduino-wiring-for-ACS758-Current-sensor

Don haɗa firikwensin halin yanzu na ACS758 zuwa Arduino, fara da haɗa fil ɗin VCC na firikwensin zuwa ƙarfin 5V na Arduino. Na gaba, haɗa fil ɗin GND na firikwensin zuwa ƙasan Arduino. Ƙarfin fitarwa na firikwensin, wanda ke ba da ƙarfin daidai da halin yanzu da aka auna, ana iya haɗa shi zuwa fil ɗin shigar da analog akan Arduino, wanda aka fi sani da A0. Tabbatar cewa kayan da kuke son aunawa an haɗa su a jere tare da firikwensin. Hanyar halin yanzu ya kamata ta gudana ta cikin firikwensin don ya iya auna halin yanzu da ke wucewa ta cikinsa daidai. Firikwensin yana da fil ɗin shigar da halin yanzu guda biyu; haɗa wayar tabbatacciyar kayan ku zuwa ɗayan waɗannan fil ɗin da ɗayan fil ɗin zuwa tabbataccen tashar samar da wutar lantarki. Ƙarƙashin ɓangaren samar da wutar lantarki ya kamata ya haɗa zuwa ƙarƙashin tashar kayan. Wannan saitin yana ba firikwensin damar auna halin yanzu da ke gudana zuwa kayan.

Misalan Code & Bayani

Code ɗin Arduino don karanta ƙimar daga firikwensin ACS758 yana da sauƙi. A ƙasa akwai wani ɓangare daga cikin code ɗin ci gaba wanda ke fara firikwensin da karanta ƙarfin:


#define VIN A0 // ayyana fil ɗin Arduino A0 a matsayin shigar da ƙarfin (V in)
const float VCC = 5.0; // ƙarfin samarwa
const float FACTOR = 20.0 / 1000; // hankali ga ACS758-100B

Wannan code ɗin yana ayyana fil ɗin shigar da analog kuma yana saita ƙarfin samarwa. Hakanan yana lissafin ƙimar hankali bisa ga samfurin da aka yi amfani da shi, wanda ke da mahimmanci don ingantaccen karatun halin yanzu. Wani muhimmin ɓangare na code ɗin shine aikin loop, wanda ke ci gaba da karanta ƙarfin daga firikwensin:


void loop() {
  float voltage_raw = (5.0 / 1023.0) * analogRead(VIN); // Karanta ƙarfin daga firikwensin
  float current = (voltage_raw - (VCC * 0.5)) / FACTOR; // Lissafa halin yanzu
  Serial.print("Current: ");
  Serial.println(current, 2); // Buga ƙimar halin yanzu
}

A wannan ɓangaren, code ɗin yana karanta ƙarfin daga firikwensin, yana daidaita shi bisa ga ƙarfin fitarwa na quiescent, kuma yana lissafin halin yanzu ta amfani da ƙimar hankali da aka ayyana. Ana buga ƙimar halin yanzu zuwa serial monitor. Don cikakken fahimtar tsarin code ɗin da aikin sa, da fatan za a koma ga cikakken code ɗin da aka ɗora a ƙasan labarin.

Nuni / Abin da za ku Yi Tsammani

Da zarar an haɗa komai daidai kuma an ɗora code ɗin, ya kamata ku ga ƙimar halin yanzu da aka nuna akan serial monitor. Karatun zai sabunta kowane rabin daƙiƙa kamar yadda aka ayyana a cikin code ɗin. Idan halin yanzu ya yi ƙasa da iyakar yankewa da aka saita a cikin code ɗin, za ku ga saƙon "No Current" da aka nuna. Wannan yankewa yana taimakawa wajen tace hayaniya da ƙananan bambance-bambance a cikin karatun halin yanzu. Yi hattara da haɗin polarity da aka juya, saboda wannan na iya lalata firikwensin. Koyaushe tabbatar da cewa an haɗa firikwensin daidai a jere tare da kayan, kuma kula da ƙarfin fitarwa don tabbatar da ingantaccen karatu. Bidiyon yana ba da ƙarin mahallin da nunin (a cikin bidiyo a 12:30).

ACS758-sensor-5-schematic

Hotuna

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100-Advanced Arduino code for the Allegro ACS758 current sensor

Harshe: C++

/*
 * 
 * Arduino Sketch for Allegro ACS758 Current Sensor (Advanced)
 * This sensor can measure current at a range of up to 200A.
 * It operates with 3.3V or 5V.
 * Please watch the video instruction and explanation for this code.
 * 
 * Written by Ahmad Shamshiri on Saturday, May 27, 2018 at 13:19 in Ajax, Ontario, Canada
 * for Robojax.com
 * View the video instruction at
 * 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 5V or 3.3V. If using PCB, set to 5V only.
const int model = 2;   // enter the model (see below)

float cutOffLimit = 1.00;// reading cutoff current. 1.00 is 1 Ampere

/*
          "ACS758LCB-050B",// for model use 0
          "ACS758LCB-050U",// for model use 1
          "ACS758LCB-100B",// for model use 2
          "ACS758LCB-100U",// for model use 3
          "ACS758KCB-150B",// for model use 4
          "ACS758KCB-150U",// for model use 5
          "ACS758ECB-200B",// for model use 6
          "ACS758ECB-200U"// for model use 7   
          // sensitivity array is holding the sensitivity of the ACS758
          // current sensors. Do not change.          
*/
float sensitivity[] ={
          40.0,// for ACS758LCB-050B
          60.0,// for ACS758LCB-050U
          20.0,// for ACS758LCB-100B
          40.0,// for ACS758LCB-100U
          13.3,// for ACS758KCB-150B
          16.7,// for ACS758KCB-150U
          10.0,// for ACS758ECB-200B
          20.0,// for ACS758ECB-200U     
         }; 

/*         
 *   Quiescent output voltage is a factor of VCC that appears at the output       
 *   when the current is zero. 
 *   For bidirectional sensors, it is 0.5 x VCC.
 *   For unidirectional sensors, it is 0.12 x VCC.
 *   For model ACS758LCB-050B, the B at the end represents Bidirectional (polarity doesn't matter).
 *   For model ACS758LCB-100U, the U at the end represents Unidirectional (polarity must match).
 *   Do not change.
 */
float quiescent_Output_voltage [] ={
          0.5,// for ACS758LCB-050B
          0.12,// for ACS758LCB-050U
          0.5,// for ACS758LCB-100B
          0.12,// for ACS758LCB-100U
          0.5,// for ACS758KCB-150B
          0.12,// for ACS758KCB-150U
          0.5,// for ACS758ECB-200B
          0.12,// for ACS758ECB-200U            
          };
const float FACTOR = sensitivity[model]/1000;// set sensitivity for selected model
const float QOV =   quiescent_Output_voltage [model] * VCC;// set quiescent Output voltage for selected model
float voltage;// internal variable for voltage
float cutOff = FACTOR/cutOffLimit;// convert current cut off to mV

void setup() {
    //Robojax.com ACS758 Current Sensor 
    Serial.begin(9600);// initialize serial monitor
    Serial.println("Robojax Tutorial");
    Serial.println("ACS758 Current Sensor");
}

void loop() {
  //Robojax.com ACS758 Current Sensor 
  float voltage_raw =   (5.0 / 1023.0)* analogRead(VIN);// Read the voltage from sensor
  voltage =  voltage_raw - QOV + 0.007 ;// 0.007 is a value to make voltage zero when there is no current
  float current = voltage / FACTOR;
  if(abs(voltage) > cutOff ){
    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);
}

101-Arduino code for Allegro ACS758 current sensor (basic)

Harshe: C++

/*
 * Arduino Sketch for Allegro ACS758 Current Sensor (Basic Simple)
 * This sensor can measure current at a range of up to 200A.
 * It operates with 3.3V or 5V (the module works with 5V, the sensor can work with 3.3V or 5V).
 * Please watch the video instruction and explanation for this code.
 * 
 * Written by Ahmad Shamshiri on Saturday, May 26, 2018 at 7:05 PM in Ajax, Ontario, Canada
 * for Robojax.com
 * View the video instruction at https://youtu.be/SiHfjzcqnU4
 * This code has been downloaded from Robojax.com
 */
#define VIN A0
const float vcc    = 5.00;// supply voltage 5V or 3.3V
const float factor = 0.02;// 20mV/A is the factor

float voltage;

void setup() {
    //Robojax.com ACS758 Current Sensor 
    Serial.begin(9600);
    Serial.println("Robojax Tutorial");
    Serial.println("ACS758 Current Tester");
    Serial.println("Basic Simple Code");
}

void loop() {
  //Robojax.com ACS758 Current Sensor 
  voltage =   (5.0 / 1023.0)* analogRead(VIN);// Read the voltage from sensor
  voltage =  voltage - (vcc * 0.5) + 0.007 ;// 0.007 is a value to make voltage zero when there is no current
  float current = voltage / factor;
  Serial.print("V: ");
  Serial.print(voltage,3);
  Serial.print("V, I: ");
  Serial.print(current,2); Serial.println("A");
  delay(500);
}

102-Advanced Arduino code for four Allegro ACS758 current sensors

Harshe: C++

/*
 * 
 * Arduino Sketch for 4 modules Allegro ACS758 Current Sensor (Advanced)
 * This sensor can measure current at a range of up to 200A.
 * It operates with 3.3V or 5V.
 * Please watch the video instruction and explanation for this code.
 * 
 * Written by Ahmad Shamshiri on August 4, 2018 at 13:19 in Ajax, Ontario, Canada
 * for Robojax.com in request from Ross M. from YouTube video https://youtu.be/SiHfjzcqnU4 
 * View the video instruction at
 * This code has been downloaded from Robojax.com
 */
#define VIN1 A0 // define the Arduino pin A0 as voltage input (V in)
#define VIN2 A1 
#define VIN3 A2 
#define VIN4 A3 

const float VCC   = 5.0;// supply voltage 5V or 3.3V. If using PCB, set to 5V only.
const int model = 2;   // enter the model (see below)

float cutOffLimit = 1.00;// reading cutoff current. 1.00 is 1 Amper

/*
          "ACS758LCB-050B",// for model use 0
          "ACS758LCB-050U",// for model use 1
          "ACS758LCB-100B",// for model use 2
          "ACS758LCB-100U",// for model use 3
          "ACS758KCB-150B",// for model use 4
          "ACS758KCB-150U",// for model use 5
          "ACS758ECB-200B",// for model use 6
          "ACS758ECB-200U"// for model use 7   
sensitivity array is holding the sensitivity of the ACS758
current sensors. Do not change.          
*/
float sensitivity[] ={
          40.0,// for ACS758LCB-050B
          60.0,// for ACS758LCB-050U
          20.0,// for ACS758LCB-100B
          40.0,// for ACS758LCB-100U
          13.3,// for ACS758KCB-150B
          16.7,// for ACS758KCB-150U
          10.0,// for ACS758ECB-200B
          20.0,// for ACS758ECB-200U     
         }; 

/*         
 *   Quiescent output voltage is a factor of VCC that appears at the output       
 *   when the current is zero. 
 *   For bidirectional sensors it is 0.5 x VCC
 *   For unidirectional sensors it is 0.12 x VCC
 *   For model ACS758LCB-050B, the B at the end represents bidirectional (polarity doesn't matter).
 *   For model ACS758LCB-100U, the U at the end represents unidirectional (polarity must match).
 *   Do not change.
 */
float quiescent_Output_voltage [] ={
          0.5,// for ACS758LCB-050B
          0.12,// for ACS758LCB-050U
          0.5,// for ACS758LCB-100B
          0.12,// for ACS758LCB-100U
          0.5,// for ACS758KCB-150B
          0.12,// for ACS758KCB-150U
          0.5,// for ACS758ECB-200B
          0.12,// for ACS758ECB-200U            
          };
const float FACTOR = sensitivity[model]/1000;// set sensitivity for selected model
const float QOV =   quiescent_Output_voltage [model] * VCC;// set quiescent Output voltage for selected model
float voltage1;// internal variable for voltage1
float voltage2;// internal variable for voltage2
float voltage3;// internal variable for voltage3
float voltage4;// internal variable for voltage4

float cutOff = FACTOR/cutOffLimit;// convert current cut off to mV

void setup() {
    //Robojax.com ACS758 Current Sensor 
    Serial.begin(9600);// initialize serial monitor
    Serial.println("Robojax Tutorial");
    Serial.println("Four ACS758 Current Sensors");
}

void loop() {
  //Robojax.com ACS758 Current Sensor 
  float voltage_raw1 =   (5.0 / 1023.0)* analogRead(VIN1);// Read the voltage from sensor
  float voltage_raw2 =   (5.0 / 1023.0)* analogRead(VIN2);// Read the voltage from sensor
  float voltage_raw3 =   (5.0 / 1023.0)* analogRead(VIN3);// Read the voltage from sensor
  float voltage_raw4 =   (5.0 / 1023.0)* analogRead(VIN4);// Read the voltage from sensor
  
  voltage1 =  voltage_raw1 - QOV + 0.007 ;// 0.007 is a value to make voltage zero when there is no current
  voltage2 =  voltage_raw2 - QOV + 0.007 ;// 0.007 is a value to make voltage zero when there is no current
  voltage3 =  voltage_raw3 - QOV + 0.007 ;// 0.007 is a value to make voltage zero when there is no current
  voltage4 =  voltage_raw4 - QOV + 0.007 ;// 0.007 is a value to make voltage zero when there is no current
  
  float current1 = voltage1 / FACTOR;
  float current2 = voltage2 / FACTOR;
  float current3 = voltage3 / FACTOR;
  float current4 = voltage4 / FACTOR;
  
  if(abs(voltage1) > cutOff ){ //Corrected abs(voltage) to abs(voltage1)

    Serial.print("I1: ");
    Serial.print(current1,2); // print the current with 2 decimal places
    Serial.println("A");
	
    Serial.print("I2: ");
    Serial.print(current2,2); // print the current with 2 decimal places
    Serial.println("A");

    Serial.print("I3: ");
    Serial.print(current3,2); // print the current with 2 decimal places
    Serial.println("A");
	
    Serial.print("I4: ");
    Serial.print(current4,2); // print the current with 2 decimal places
    Serial.println("A");	
	
  }else{
    Serial.println("No Current");
  }
  delay(500);
}

Abin da zaka iya bukata

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ACS758 Current Sensor on Amazon
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Amazon
ACS758 Current Sensor on Amazon Canada
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Amazon
Purchase Allegro ACS758 Current Sensor from Amazon
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eBay
Purchase Allegro ACS758 Current Sensor from eBay
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AliExpress
Purchase Allegro ACS758 Current Sensor from AliExpress
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Sauran fayiloli

Adafruit PCA9685 16-Channel Servo Driver
robojax_PCA9685_extra_learning.pdf
Alegro ACS Current Library
Arduino library for Allegro ACS current sensor modules. Provides functions to read current measurements from ACS712 and similar sensors.

robojax_Alegro_ACS_Current_library.zip 0.02 MB