Microprocessor Based Thermometer Device

Mohd Sufian , Musa (2007) Microprocessor Based Thermometer Device. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This project is to design a thermometer that can display the current temperature at any time. The temperature is displayed by LCD at the press of the button. The logic of deciding the maximum and minimum temperatures is implemented in Assembly Language on microprocessor. This thermometer device uses the DS 1820 as a temperature sensor. This temperature sensor can detect any change of temperature in format from -55 °C to + 125 °C. These sensors have relatively small physical sizes. The data from this sensor will be send to the brain of the thermometer- Integrated Circuit 16F84. This IC will be programming by the Assembly Language 8085. After that, as a result the LCD screen will show the temperature value in Kelvin and degree Celsius. All this process in the thermometer will use 5 Volt as a power supply for operates. This thermometer also used a microcontroller PID to control all the input from the circuit of sensor and the output to display temperature in digital number. This project is expected to improve the temperature measurement for everyone that need to know the accurate temperature.

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