Design and Implementation of a Microcontroller-based Automatic Temperature-sensing Relay

Winnie Dkhar

Abstract


A temperature-based relay is designed using a microcontroller, which can be programmed easily for changed settings. The system is built around an Arduino Uno microcontroller that is connected to relays, an LED, and an LM35 temperature sensor. The temperature sensor provides an electrical output corresponding to the temperature in °C and can be used to measure temperature. To determine the temperature of a given room, the Arduino Uno microcontroller decodes the temperature reading from the temperature sensor and compares it to a temperature value that has been set through the program. The microprocessor then automatically switches the relay ON or OFF depending on the comparison algorithm, which is indicated by an LED turning ON or OFF. The primary goal of this work was to design and build an automatic temperature-controlled relay, based on a microcontroller. It has been accomplished with high accuracy. The relay tested for different temperature conditions shows a wide variability in the range of operation. This experimental work serves as an example of how embedded systems are used in electrical device design.

Keywords


LM35; Arduino UNO; LED; temperature relay.

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References


P. M. Anderson and B. K. LeReverend, “Industry experience with special protection schemes,” in IEEE Transactions on Power Systems, vol. 11, no. 3, pp. 1166-1179, Aug. 1996, doi: 10.1109/59.535588.

M. K. A. Senin and M. A. O. Mydin, “Significance of Thermal Comfort in Buildings and Its Relation to the Building Occupants,” European Journal of Technology and Design, vol. 1, no. 1, Sept. 2013, pp. 54–63. Available: https://ejtd.cherkasgu.press/journals_n/1378356078.pdf

A. Daoud, “An Arduino-based Low-Cost Hardware for Temperature Control,” WSEAS TRANSACTIONS ON SYSTEMS, vol. 20, Apr. 2021, pp. 54–66. doi: https://doi.org/10.37394/23202.2021.20.8

N. A Junizan, A. A. Razak, B. Balakrishnan, W. A. F. W. Othman, “Design and Implementation of Automatic Room Temperature Controlled Fan using Arduino Uno and LM35 Heat Sensor,” International Journal of Engineering Creativity and Innovation, vol. 1, no. 2, 2019, pp. 8-14. Available: https://www.academia.edu/40791930/Design_and_Implementation_of_Automatic_Room_Temperature_Controlled_Fan_using_Arduino_Uno_and_LM35_Heat_Sensor

K. Mahmud, M. S. Alam and R. Ghosh, “Design of digital thermometer based on PIC16F77A single chip microcontroller,” 2013 3rd International Conference on Consumer Electronics, Communications and Networks, Xianning, China, 2013, pp. 246-249, doi: 10.1109/CECNet.2013.6703317.

Texas Instruments, “LM35 Precision Centigrade Temperature Sensors,” TI Datasheet, SNIS159H, August 1999–Revised December 2017. [Online]. Available: https://www.ti.com/lit/ds/symlink/lm35.pdf (accessed: 3 May 2023)

D. Sonker, V. Khatri, R. Kaur and A. Yadav, “Measurement of Temperature with Sensor LM35,” Journal of Engineering, Computing and Architecture, vol. 11, no. 5, May 2021, pp. 181-189. Available: https://journaleca.com/volume-11-issue-5-2021/ (accessed: 25 April 2023)




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