Temperature BCD code displayed in the 0809 significantly depending on the voltage value, so the voltage must be converted into temperature values. LM35 temperature sensor voltage characteristics 10mV/° C , by the amplifier circuit to enlarge four times the post-40mV/° C, so for example 255, each number represents a 20mV, voltage value that is to say each represents 00,000,002 temperature value of 00000001, which can be made available for out of a BCD code conversion table, this part of the procedures are as follows:

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