Other Arduino Codes and Videos by Robojax
This code is to measure current using Allegro ACS758 Current Sensor.
Allegro ACS758 Current Sensor works with AC and DC current
/*
*
* Arduino Sketch for Allegro ACS758 Current Sensor (Advanced)
* this sensor can measure current at range of up to 200A
* It operates with 3.3 or 5V
* Please watch video instruction and explanation for this code.
*
* Written by Ahmad Shamshiri on Saturday May 27,2018 at 13:19 at 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 cutt off 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 sensitivy 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 factor for VCC that appears at output
* when the current is zero.
* for Bidirectional sensor it is 0.5 x VCC
* for Unidirectional sensor 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);
}
This is basic code to measure current using Allegro ACS758 Current Sensor . See video for details.
/*
* Arduino Sketch for Allegro ACS758 Current Sensor (Basic Simple)
* this sensor can measure current at range of up to 200A
* It operates with 3.3 or 5V (the module works with 5V, sensor can work with 3.3 or 5V)
* Please watch video instruction and explanation for this code.
*
* Written by Ahmad Shamshiri on Saturday May 26,2018 at 19:05 at 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);
}
/*
*
* Arduino Sketch for 4 modules Allegro ACS758 Current Sensor (Advanced)
* this sensor can measure current at range of up to 200A
* It operates with 3.3 or 5V
* Please watch video instruction and explanation for this code.
*
* Written by Ahmad Shamshiri on August 04,2018 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 cutt off 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 sensitivy 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 factor for VCC that appears at output
* when the current is zero.
* for Bidirectional sensor it is 0.5 x VCC
* for Unidirectional sensor 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(voltage) > cutOff ){
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);
}
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