Digital Speedometer and Odometer Circuit using PIC Microcontroller

there is some error in the code .... iam not getting the output.. pls kindly help me

Can you please give me the hex code of your c file

16f1946 circuit diagram and data in or data out pin number and mamory flash system

Hey Ashwin, I was wondering if this project is viable in real life application or not. because there we have tire is connected to bike with iron type material instead of plastic material.

before thanks you for the project we have given us completly.now i wish if it is possible having the code in asm .thank you

The distance covered is calculated using circumference whose formula is 2*pi*r not pi*r*r therefore the disance covered should be 1.884m

Does this project works? I'm at last stage of submissions. Can i go for this project ? Reply asap plz

Which power supply is needed ? 5v or 12v ?

I want to edit the program but I can not create an old hex file
It shows me a line in (#include <xc.h>) where this file exists
If you delete it, the error appears at d4
Note that I use the micr c of Virgin 6.6.1. I also tried the hex file on the simulation program and it works well but the distance is up to 998 and starting from the first, what is the solution to make the distance meter reach more than this and how can I keep it With this value even after the power outage and when the operation again follows the count after the last number
thank you very much

can you please compile once more the program,as there are errors in the lcd fuctions and interrupt fuctions

sir can I ask why rpm = (1000/milli_sec) * 60; what (1000) stands for. Can i use this algorithm to calculate speed in the interrupt: SPEED=(3600*2*PI*0.3)/milli_sec; /////0.3m radius, 3600 to exchange m/ms to km/h

Haii aswinth
Iam USING mplabx v3.35& xc8 compiler v1.45
Iam getting so many errors regarding LCD commands&
int c1,c2,c3,int distance,int d1,int d2,int d3
I checked all ur tutorials interfacing LCD,
In that no code is bulid without errors.
Could you please give me any suggestions to overcome all errors.
Errors are appearing as
->Warning:(373 ) implicit signed to unsigned conversion
->Arithmetic overflow in constant expression
->Illegal conversion between pointer variables

can i get the hex file ..plz.its urgent

Velocity = (RPM (diameter * Pi) / 60)

v= radius_of_wheel * rpm * 0.37699

how the value 0.37699 is obtained if, v = (RPM * 2R * 3.14) / 60

                                                          = RPM * R * 0.104

Can i get the hex file please

frequency please? at what frequency microcontroller will run the hex file?

How the value 0.37699 obtained? and why RPM is (1000/TT)*60 what this 1000 means or stands for?

please hex file

Can you please provide a mikroC code or hex file of this code.

MikroC code would be preferred.

Thank You 

sir,how i make a digital speedmetter circuit without using ardiuno or mcu

hi iam try to copy paste and add some but not compile ineed help to get it

#define _XTAL_FREQ 20000000
#define RS RD2
#define EN RD3
#define D4 RD4
#define D5 RD5
#define D6 RD6
#define D7 RD7
#pragma config FOSC = HS        // Oscillator Selection bits (HS oscillator)
#pragma config WDTE = OFF       // Watchdog Timer Enable bit (WDT disabled)
#pragma config PWRTE = ON       // Power-up Timer Enable bit (PWRT enabled)
#pragma config BOREN = ON       // Brown-out Reset Enable bit (BOR enabled)
#pragma config LVP = OFF        // Low-Voltage (Single-Supply) In-Circuit Serial Programming Enable bit (RB3 is digital I/O, HV on MCLR must be used for programming)
#pragma config CPD = OFF        // Data EEPROM Memory Code Protection bit (Data EEPROM code protection off)
#pragma config WRT = OFF        // Flash Program Memory Write Enable bits (Write protection off; all program memory may be written to by EECON control)
#pragma config CP = OFF         // Flash Program Memory Code Protection bit (Code protection off)
 char data;
int speed =0;
int milli_sec=0;
int rpm=0;
int c1,c2,c3;
int d1,d2,d3;
int distance;
 unsigned int i=1065244 ;
//LCD Functions Developed by Circuit Digest.
void Lcd_SetBit(char data_bit) //Based on the Hex value Set the Bits of the Data Lines
{
if(data_bit& 1)
PORTD.F4 = 1;
else
PORTD.F4 = 0;

if(data_bit& 2)
PORTD.F5 = 1;
else
PORTD.F5 = 0;

if(data_bit& 4)
PORTD.F6 = 1;
else
PORTD.F6 = 0;

if(data_bit& 8)
PORTD.F7 = 1;
else
PORTD.F7 = 0;
}

void Lcd (char a)
{
PORTD.F2 = 0;
Lcd_SetBit(a); //Incoming Hex value
PORTD.F3 = 1;
      delay_ms(4);
     PORTD.F3  = 0;
}

void Lcd_Clear()
{
Lcd_Cmd(0); //Clear the LCD
Lcd_Cmd(1); //Move the curser to first position
}

void Lcd_Set_Cursor(char a, char b)
{
char temp,z,y;
if(a== 1)
{
 temp = 0x80 + b - 1; //80H is used to move the curser
z = temp>>4; //Lower 8-bits
y = temp & 0x0F; //Upper 8-bits
Lcd_Cmd(z); //Set Row
Lcd_Cmd(y); //Set Column
}
else if(a== 2)
{
temp = 0xC0 + b - 1;
z = temp>>4; //Lower 8-bits
y = temp & 0x0F; //Upper 8-bits
Lcd_Cmd(z); //Set Row
Lcd_Cmd(y); //Set Column
}
}

void Lcd_Start()
{
  Lcd_SetBit(0x00);
  for( i<=1065244; i<=0; i--)NOP();
  Lcd_Cmd(0x03);
delay_ms(5);
  Lcd_Cmd(0x03);
delay_ms(11);
  Lcd_Cmd(0x03);
  Lcd_Cmd(0x02); //02H is used for Return home -> Clears the RAM and initializes the LCD
  Lcd_Cmd(0x02); //02H is used for Return home -> Clears the RAM and initializes the LCD
  Lcd_Cmd(0x08); //Select Row 1
  Lcd_Cmd(0x00); //Clear Row 1 Display
  Lcd_Cmd(0x0C); //Select Row 2
  Lcd_Cmd(0x00); //Clear Row 2 Display
  Lcd_Cmd(0x06);
}

void Lcd_Print_Char(char data )  //Send 8-bits through 4-bit mode
{
   char Lower_Nibble,Upper_Nibble;
   Lower_Nibble = data&0x0F;
   Upper_Nibble = data&0xF0;
   RS = 1;             // => RS = 1
   Lcd_SetBit(Upper_Nibble>>4);             //Send upper half by shifting by 4
   EN = 1;
   for(int i=2130483; i<=0; i--)
    NOP();
   EN = 0;
   Lcd_SetBit(Lower_Nibble); //Send Lower half
   EN = 1;
   for(int i=2130483; i<=0; i--)  
   NOP();
   EN = 0;
}

void Lcd_Print_String(char *a)
{
int i;
for(i=0;a[i]!='\0';i++)
  Lcd_Print_Char(a[i]);  //Split the string using pointers and call the Char function
}
/*****End of LCD Functions*****/

/****Interrupt function ****/
void interrupt speed_isr()
{
        if(TMR0IF==1) // Timer has overflown
    {
        TMR0IF=0;       // Clear timer interrupt flag
         milli_sec++;
    }

        if (INTF==1)
        {
           rpm = (1000/milli_sec) * 60;
           speed = 0.3 * rpm * 0.37699; // (Assuming the wheel radius to be 30cm)
           INTF = 0;          // clear the interrupt flag
            milli_sec=0;
            distance= distance+028.2;
        }
}
/****End of Interrupt Function****/

int main()
{
    TRISD = 0x00; //PORTD declared as output for interfacing LCD
    TRISB0 = 1;        //DEfine the RB0 pin as input to use as interrupt pin
    OPTION_REG = 0b00000101;  // Timer0 with external freq and 64 as prescalar // Also Enables PULL UPs
    TMR0=100;       // Load the time value for 1ms; delayValue can be between 0-256 only
    TMR0IE=1;       //Enable timer interrupt bit in PIE1 register
    GIE=1;          //Enable Global Interrupt
    PEIE=1;         //Enable the Peripheral Interrupt
    INTE = 1;          //Enable RB0 as external Interrupt pin
    Lcd_Start();

    while(1)
    {
        c1 = (speed/100)%10;
        c2 = (speed/10)%10;
        c3 = (speed/1)%10;
        d1 = (distance/100)%10;
        d2 = (distance/10)%10;
        d3 = (distance/1)%10;

        if (milli_sec>1000)
        {
            speed=0;
        }
        Lcd_Set_Cursor(1,1);
        Lcd_Print_String("Speed(km/hr): ");
        Lcd_Print_Char(c1+'0');
        Lcd_Print_Char(c2+'0');
        Lcd_Print_Char(c3+'0');
        Lcd_Set_Cursor(2,1);
        Lcd_Print_String("Dist_Cov(m): ");
        Lcd_Print_Char(d1+'0');
        Lcd_Print_Char(d2+'0');
        Lcd_Print_Char(d3+'0');
    }
    return 0;
}

could someone clarify the specifications of components?

Sir,  I read again and again the code and the comments but still cannot figure how you got the value of 0.37699 in  "The value is also multiplied with 0.37699". Please explain with details or if possible with taking circumference instead of radius. Thanks