Make your own Power Inverter using Arduino

1#include "TimerOne.h"               // include TimerOne.h
2#define  low_battery_voltage 10.2               // define high battery voltage limit as 14.2
3#define  high_battery_voltage 14.4               // define low battery voltage limit as 10.2
4int  dutycycle = 0;               // Initailize duty cylce variable as integer data type
5int  sense_value =0;               // Initialize sense_value variable to capture the  adc reading of battery voltage (range from 0 to 1023)
6float battery_voltage =  0.0;               // Initialize battery_voltage variable as a float data type to  convert sense_value to actual battery voltage
7                                                 
8                                                 
9void setup()               //  Setup function
10{
11  pinMode (9,OUTPUT);              // set pin 9 as an output  pin for pwm
12  pinMode (10,OUTPUT);             // set pin 10 as an output pin  for pwm 
13  Timer1.initialize(20000);             // Initailize timer1 time period  as 20 milli second (50 Hz frequency)
14  Timer1.attachInterrupt(battery_voltage_measurement);      // battery_voltage_measurement function will be executed every 20 milli second  using timer 1 overflow interrupt
15  TCCR1A = (TCCR1A & 0x0F) | 0xB0 ;             //  set pin 10 inverted of pin 9
16}  
17   
18void battery_voltage_measurement()               // battery_voltage_measurement function starts
19{ sense_value =  (analogRead(A0));               // read battery voltage on pin A0 & capture that  value in sense_value variable
20                                             //  {warning - arduino pin accept only upto 5v so don't forget to map upper 
21                                             //  battery volatge i.e 14.2v to 5v using voltage divider resistor network}
22                                                 
23  battery_voltage = sense_value * (14.4/1023.0);               // convert sense_value  (0 to 1023) to range (0 to 14.2)
24 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
25        {
26          dutycycle = 300;
27        }
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29                                                
30 else if(battery_voltage < 10.2  || battery_voltage > 14.4)              // if battery voltage is below 10.2v or  above 14.2v , 
31       {
32          dutycycle = 0;         //set the duty cycle  to 0 and inverter will go in cutoff mode
33       }                                      
34                                                 
35                                                
36}              // battery_voltage_measurement function ends
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38                                                 
39 void loop()              //  loop function starts
40{
41  Timer1.pwm(9,dutycycle,20000);              // Timer1.pwm  function takes argument as (pin no. , dutycycle , time period)
42  Timer1.pwm(10,1023-dutycycle,20000);                         
43                                                                          
44}               // loop function ends
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1#include "TimerOne.h"               // include TimerOne.h
2#define
3  low_battery_voltage 10.2               // define high battery voltage limit as 14.2
4#define
5  high_battery_voltage 14.4               // define low battery voltage limit as 10.2
6int
7  dutycycle = 0;               // Initailize duty cylce variable as integer data type
8int
9  sense_value =0;               // Initialize sense_value variable to capture the
10  adc reading of battery voltage (range from 0 to 1023)
11float battery_voltage =
12  0.0;               // Initialize battery_voltage variable as a float data type to
13  convert sense_value to actual battery voltage
14                                                 
15
16                                                 
17void setup()               //
18  Setup function
19{
20  pinMode (9,OUTPUT);              // set pin 9 as an output
21  pin for pwm
22  pinMode (10,OUTPUT);             // set pin 10 as an output pin
23  for pwm 
24  Timer1.initialize(20000);             // Initailize timer1 time period
25  as 20 milli second (50 Hz frequency)
26  Timer1.attachInterrupt(battery_voltage_measurement);
27      // battery_voltage_measurement function will be executed every 20 milli second
28  using timer 1 overflow interrupt
29  TCCR1A = (TCCR1A & 0x0F) | 0xB0 ;             //
30  set pin 10 inverted of pin 9
31}  
32   
33void battery_voltage_measurement()
34               // battery_voltage_measurement function starts
35{ sense_value =
36  (analogRead(A0));               // read battery voltage on pin A0 & capture that
37  value in sense_value variable
38                                             //
39  {warning - arduino pin accept only upto 5v so don't forget to map upper 
40                                             //
41  battery volatge i.e 14.2v to 5v using voltage divider resistor network}
42                                                 
43
44  battery_voltage = sense_value * (14.4/1023.0);               // convert sense_value
45  (0 to 1023) to range (0 to 14.2)
46 if(battery_voltage < 14.4 && battery_voltage
47  > 10.2) // if battery voltage is under limit i.e between 10.2 and 14.2 then dutycycle
48  will be 150
49        {
50          dutycycle = 300;
51        }
52                                                 
53
54                                                
55 else if(battery_voltage < 10.2
56  || battery_voltage > 14.4)              // if battery voltage is below 10.2v or
57  above 14.2v , 
58       {
59          dutycycle = 0;         //set the duty cycle
60  to 0 and inverter will go in cutoff mode
61       }                                      
62
63                                                 
64                                                
65}
66              // battery_voltage_measurement function ends
67                                                 
68
69                                                 
70 void loop()              //
71  loop function starts
72{
73  Timer1.pwm(9,dutycycle,20000);              // Timer1.pwm
74  function takes argument as (pin no. , dutycycle , time period)
75  Timer1.pwm(10,1023-dutycycle,20000);
76                         
77                                                                          
78}
79               // loop function ends
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