here i am sending some

[dagakshay]

here i am sending some links:

 

how to interface 8051 with temperature sensor (LM35)……..

http://www.engineersgarage.com/microcontroller/8051projects/celsius-fahrenheit-scale-thermometer-AT89C51-circuit

 

you need to use the inbuilt ADC of AVR:

http://www.engineersgarage.com/embedded/avr-microcontroller-projects/adc-circuit