Help regarding Digital Thermometer

[Sanjeeb Kumar Mohanty]

Hello everyone. I want to build a digital thermometer using LM35, ATMega16 and 7-segment- display. Can anyone give me the code and schematics for this ?? I will be grtful. Plz help.

 

 

Thanks…

[adip]

hi sandeeb,

actually a program in this site in microcontrollers-avr is avialable.

i have pasted it below.

only thing is you need a interfacing diagram which is a single pin of LM 35 going to microcontroller and the rest 2 are vcc and ground.

you can get diagram from net.

i think it will work.

if the below code does not work in some software try to change the header file.

 

 

 

 // Program to take input from a particular pin in AVR Microcontroller (ATmega16) #include<avr/io.h> #include<util/delay.h>

int main (void)
{
      unsigned int i=0;
      DDRA=~_BV(PA0);   // PA0 as input pin
      PORTA=0x00;
      DDRD=0xff;

while(1)
      {
            PORTD=0x01;
            while(PORTD!=0)
            {
                  if(bit_is_set(PINA,PA0))       //If PA0=1
                  {
                        _delay_ms(100);

if(bit_is_set(PINA,PA0))//Check it again due to swithc debouncing
                        PORTD=(PORTD<<1);        //Left shift value of PORTD by 1
                 
                  }
                 
            }
      }
}

[Sanjeeb Kumar Mohanty]

Thanks adip

[Author]

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