Interfacing of Temperature Sensor
Description : Temperature sensor is a device that converts analog signal to digital.
The temperature sensor used in the proposed system is LM35. the o/p of the temperature sensor is linearly proportional to the Celsius scale .The IC doesn't need any external calibration to give accuaries.
An ADC(Analog ti Digital Converter) needs to be inter forced with 8051 micro controller to allow analog i/p for processing of data .Here serial I/O port is used to make the flow of data between controllers and also other devices .The ADC converts the input analog signal into equivalent digital signal by using the reference voltage.
The 8 bit micro controller AT89C51 belongs to 8051 family it consists of 128 bytes of RAM, 16 bit of ROM - 4 K bytes. The main function of the micro controller in the proposed system is to analyze the temperature which is sensed by temperature sensor.
The ADC is responsible for converting a continuous physical quantity to a digital number that represents the quality of amplitude .
The result is a sequence of digital values that have been converted from a continuous time and continuous amplitude analog signal to a discrete time and amplitude digital signal.
Comments
Post a Comment