Shailza Kant Pandey
Published © GPL3+

Make an Inverter at Home Using Arduino

This project is all about making a power inverter using arduino. The Inverter produces 220VAC from 12V battery.

IntermediateFull instructions provided8,484
Make an Inverter at Home Using Arduino

Things used in this project

Hardware components

Arduino Nano R3
Arduino Nano R3
×1
Dual H-Bridge motor drivers L293D
Texas Instruments Dual H-Bridge motor drivers L293D
×1
Linear Regulator (7805)
Linear Regulator (7805)
×1
Mosfet IRF3205
×2
transformer 12-0-12 / 220V 600VA
×1
Breadboard (generic)
Breadboard (generic)
×1
SparkFun Snappable Protoboard
SparkFun Snappable Protoboard
×1
Battery 12V 7.2AH
×1

Hand tools and fabrication machines

DSO
Multimeter
Soldering iron (generic)
Soldering iron (generic)

Story

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Schematics

Schematics of Inverter using Arduino nano

Complete schematic of inverter using Arduino nano drawn in Eagle software

Code

Inverter

Arduino
Its an Arduino nano Code
#include "TimerOne.h"               // include TimerOne.h
#define low_battery_voltage 10.2               // define high battery voltage limit as 14.2
#define high_battery_voltage 14.4               // define low battery voltage limit as 10.2
int dutycycle = 0;               // Initailize duty cylce variable as integer data type
int sense_value =0;               // Initialize sense_value variable to capture the adc reading of battery voltage (range from 0 to 1023)
float battery_voltage = 0.0;               // Initialize battery_voltage variable as a float data type to convert sense_value to actual battery voltage
                                                 
                                                 
void setup()               // Setup function
{
  pinMode (9,OUTPUT);              // set pin 9 as an output pin for pwm
  pinMode (10,OUTPUT);             // set pin 10 as an output pin for pwm 
  Timer1.initialize(20000);             // Initailize timer1 time period as 20 milli second (50 Hz frequency)
  Timer1.attachInterrupt(battery_voltage_measurement);      // battery_voltage_measurement function will be executed every 20 milli second using timer 1 overflow interrupt
  TCCR1A = (TCCR1A & 0x0F) | 0xB0 ;             // set pin 10 inverted of pin 9
}  
   
void battery_voltage_measurement()               // battery_voltage_measurement function starts
{ sense_value = (analogRead(A0));               // read battery voltage on pin A0 & capture that value in sense_value variable
                                             // {warning - arduino pin accept only upto 5v so don't forget to map upper 
                                             //  battery volatge i.e 14.2v to 5v using voltage divider resistor network}
                                                 
 battery_voltage = sense_value * (14.4/1023.0);               // convert sense_value (0 to 1023) to range (0 to 14.2)
 if(battery_voltage < 14.4 && battery_voltage > 10.2) // if battery voltage is under limit i.e between 10.2 and 14.2 then dutycycle will be 150
        {
          dutycycle = 300;
        }
                                                 
                                                
 else if(battery_voltage < 10.2 || battery_voltage > 14.4)              // if battery voltage is below 10.2v or above 14.2v , 
       {
          dutycycle = 0;         //set the duty cycle to 0 and inverter will go in cutoff mode
       }                                      
                                                 
                                                
}              // battery_voltage_measurement function ends
                                                 
                                                 
 void loop()              // loop function starts
{
  Timer1.pwm(9,dutycycle,20000);              // Timer1.pwm function takes argument as (pin no. , dutycycle , time period)
  Timer1.pwm(10,1024-dutycycle,20000);                         
                                                                          
}               // loop function ends
                                                 
                                                 
                                                 
                                                 
                                              
                                                
                                                 
                                               
                                             

Credits

Shailza Kant Pandey

Shailza Kant Pandey

1 project • 7 followers
i am an electronics enthusiast , worked in various fields like SMPS, Home Automation , inverter designing using arduino etc.

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