Digital Remote Thermometer

Nooraihan , Rasip (2007) Digital Remote Thermometer. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Digital remote thermometer in the market currently, mostly the output is represented in BCD display to show the measured temperature. Beside, digital remote thermometer is usually used in certain area such office building and factory where the temperature has to stable in order to produce a quality product. But most of this digital remote thermometer is not user friendly because only display the temperature of the room without gives a clear warning to the user. Thus, this project is to build a digital remote thermometer with using PIC microcontroller. The PIC is to produce output of the thermometer where in this project the output is an alarm. Therefore, users are able to know the temperature of the certain area. Distance between transmitter and receiver circuit can reach hundred meters, provided both units are connected to the mains supply. In this project, main power supply will be used a transmission medium to transmit the data. By using the main supply where there is existing connection in building, the thermometer can transmit the data to the whole building. The operation of this remote thermometer is based on the temperature measured by a sensor in range of 0°C to 100°C. Signal from the temperature sensor are sent to the microcontroller by using transmission line. Microcontroller are used for this project is PIC 16F877A. The output from the system will sound the alarm when the temperature is over the value specified. While the input are the frequency value where it is determine the limitation for every measured temperatures.

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