digital

By using a DAC you are generating a analog voltage V which is proportion to corresponding digital voltage D

 V≈kD  where k is some constant and D can be written as

D=a₁*2^-1+a₂*2^-2+_________+a_n*2^-n ................( 1 )

This article is about a simple ranges -55 to 150°C digital thermometer with 1°C resolution using ATMEGA32.The circuit is based on LM35 analog temperature sensor,