Other Arduino Codes and Videos by Robojax
Using this code and video is about measuring DC current up to 500A using the Any Shunt Resistor.
/*
* This Arduin to measure DC Current using The 75mV Shunt resistor for up 500A
* * 50A 75mV, 100A 75mV, 200A 75mV, 300A, 500A
*
* Watch Video instrution for this code:https://youtu.be/xHe9RRQWMBM
*
* Full explanation of this code and wiring diagram is available at
* my Arduino Course at Udemy.com here: http://robojax.com/L/?id=62
* Written by Ahmad Shamshiri on May 10, 2020 at 04:18 in Ajax, Ontario, Canada
* in Ajax, Ontario, Canada. www.robojax.com
*
* Get this code and other Arduino codes from Robojax.com
Learn Arduino step by step in structured course with all material, wiring diagram and library
all in once place. Purchase My course on Udemy.com http://robojax.com/L/?id=62
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* * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.*
* This code has been download from Robojax.com
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
const int inPin =A0;//can change
const float SHUNT_CURRENT =100.00;//A
const float SHUNT_VOLTAGE =75.0;// mV
const float CORRECTION_FACTOR = 2.00;
// start of settings for LCD1602 with I2C
#include <LiquidCrystal_I2C.h>
// Set the LCD address to 0x27 for a 16 chars and 2 line display
LiquidCrystal_I2C lcd(0x26, 16, 2);
// end of settings for LCD1602 with I2C
const int ITERATION = 30; //can change (see video)
const float VOLTAGE_REFERENCE = 1100.00;//1.1V
const int BIT_RESOLUTION =10;//and 12 for Due and MKR
const boolean DEBUG_ONCE = true;
// the setup routine runs once when you press reset:
void setup() {
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
Serial.println("Robojax 50A Current for Arduino");
lcd.begin();
lcd.backlight();
lcd.print("Robojax Shunt 75mV");
lcd.setCursor(0,1);
lcd.print("Current:");
//for line below see https://www.arduino.cc/reference/en/language/functions/analog-io/analogreference
analogReference(INTERNAL);//1.1V internal reference
//analogReadResolution(BIT_RESOLUTION);//only Arduino with Due and MKR
delay(500);
}
// the loop routine runs over and over again forever:
void loop() {
//robojax.com 500A Shunt Current Measurement for Arduino
//lcd.clear();// clear previous values from screen
if(getCurrent())
{
lcdDisplay(getCurrent());
}else{
lcdDisplay(0.0);
}
delay(1000);
//printDebug();
//printCurrent();
//getCurrent();
//delay(500);
}
/*
* getCurrent()
* @brief gets current
* @param none
* @return returns one of the values above
* Written by Ahmad Shamshiri for robojax.com
* on May 10, 2020 at 03:05 in Ajax, Ontario, Canada
*/
float getCurrent()
{
//robojax.com 500A Shunt Current Measurement for Arduino
float averageSensorValue =0;
int sensorValue ;
float voltage, current;
for(int i=0; i< ITERATION; i++)
{
sensorValue = analogRead(inPin);
delay(5);
if(sensorValue !=0 && sensorValue < 100)
{
voltage = (sensorValue +0.5) * (VOLTAGE_REFERENCE / (pow(2,BIT_RESOLUTION)-1));
current = voltage * (SHUNT_CURRENT /SHUNT_VOLTAGE ) ;
if(i !=0){
averageSensorValue += current+CORRECTION_FACTOR;
}
delay(1);
}
}
//IGNORE_CURRENT_BELOW
averageSensorValue /=(ITERATION-1);
return averageSensorValue;
}//getCurrent()
/*
* printCurrent()
* @brief prints the current on serial monitor
* @param none
* @return none
* Written by Ahmad Shamshiri for robojax.com
* on May 08, 2020 at 02:45 in Ajax, Ontario, Canada
*/
void printCurrent()
{
Serial.println("Current:");
Serial.print(getCurrent(),2);
Serial.println("A");
Serial.println();
}//printCurrent()
/*
* printDebug()
* @brief prints the full details of current measurement
* @param none
* @return none
* Written by Ahmad Shamshiri for robojax.com
* on May 08, 2020 at 02:45 in Ajax, Ontario, Canada
*/
void printDebug()
{
//robojax.com 500A Shunt Current Measurement for Arduino
Serial.print("Debug Details Measureing ");
Serial.print(ITERATION);
Serial.println(" Times");
Serial.print("Reading from pin: ");
Serial.println(inPin);
Serial.print("Shunt Voltage: ");
Serial.print(SHUNT_VOLTAGE);Serial.println("mV");
Serial.print("Shunt Current: ");
Serial.print(SHUNT_CURRENT);Serial.println("A");
Serial.print("Voltage Reference: ");
Serial.print(VOLTAGE_REFERENCE);Serial.println("mV");
Serial.print("Bits Resolution: ");
Serial.print(BIT_RESOLUTION);Serial.println(" bits");
Serial.println();
Serial.println("Sensor Voltage Current");
int sensorValue ;
float voltage, current;
float averageCurrentValue=0;
for(int i=0; i< ITERATION; i++)
{
sensorValue = analogRead(inPin);
delay(5);
if(sensorValue !=0 && sensorValue < 100)
{
Serial.print(sensorValue);
voltage = (sensorValue +0.5) * (VOLTAGE_REFERENCE / (pow(2,BIT_RESOLUTION)-1));
Serial.print(" ");Serial.print(voltage);
current = voltage * (SHUNT_CURRENT /SHUNT_VOLTAGE ) ;
if(i !=0) averageCurrentValue += current+CORRECTION_FACTOR;
Serial.print("mV ");Serial.print(current);Serial.println("A");
delay(100);
}else{
i--;
}
}
averageCurrentValue /=(ITERATION-1);
Serial.print("Average Current: ");
Serial.print(averageCurrentValue);
Serial.println("A");
Serial.println();
while(DEBUG_ONCE);
}//printDebug
/*
* lcdDisplay(float current)
* @brief prints current on LCD1602 or LCD2004
* @param current of type float
* @return none
* Written by Ahmad Shamshiri for robojax.com
* on May 10, 2020 at 15:00 in Ajax, Ontario, Canada
*/
void lcdDisplay(float current)
{
// Robojax.com LCD1602 for 75mV Shune Current Demo
lcd.setCursor (10,1); //
lcd.print(current);
lcd.setCursor (15,1); //
lcd.print("A");
// Robojax.com LCD1602 for 75mV Shune Current Demo
}
/*
* lcdDisplay(float current)
* @brief prints current on LCD1602 or LCD2004
* @param current of type float
* @return none
* Written by Ahmad Shamshiri for robojax.com
* on May 10, 2020 at 15:00 in Ajax, Ontario, Canada
*/
void lcdDisplay2(char * title,float current)
{
// Robojax.com LCD1602 for 75mV Shune Current Demo
lcd.setCursor (0,0); //
lcd.print(title);
lcd.setCursor (10,0); //
lcd.print(current);
lcd.setCursor (15,0); //
lcd.print("A");
// Robojax.com LCD1602 for 75mV Shune Current Demo
}
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