World Journal of Engineering Research and Technology (WJERT) has indexed with various reputed international bodies like : Google Scholar , Index Copernicus , Indian Science Publications , SOCOLAR, China , International Institute of Organized Research (I2OR) , Cosmos Impact Factor , Research Bible, Fuchu, Tokyo. JAPAN , Scientific Indexing Services (SIS) , Jour Informatics (Under Process) , UDLedge Science Citation Index , International Impact Factor Services , International Scientific Indexing, UAE , International Society for Research Activity (ISRA) Journal Impact Factor (JIF) , International Innovative Journal Impact Factor (IIJIF) , Science Library Index, Dubai, United Arab Emirates , Scientific Journal Impact Factor (SJIF) , Science Library Index, Dubai, United Arab Emirates , Eurasian Scientific Journal Index (ESJI) , Global Impact Factor (0.342) , IFSIJ Measure of Journal Quality , Web of Science Group (Under Process) , Directory of Research Journals Indexing , Scholar Article Journal Index (SAJI) , International Scientific Indexing ( ISI ) , 

World Journal of Engineering
Research and Technology

( An ISO 9001:2015 Certified International Journal )

An International Peer Reviewed Journal for Engineering Research and Technology

ISSN 2454-695X

Impact Factor : 5.924

ICV : 79.45

News & Updation

  • Article Invited for Publication

    Article are invited for publication in WJERT Coming Issue

  • ICV

    WJERT Rank with Index Copernicus Value 79.45 due to high reputation at International Level

  • WJERT New Impact Factor

    Its our Pleasure to Inform you that WJERT Impact Factor has been increased from  5.549 to 5.924 due to high quality Publication at International Level


    JANUARY 2021 Issue has been successfully launched on 1 January 2021.

  • New Issue Published

    Its Our pleasure to inform you that, WJERT 1 January 2021 Issue has been Published, Kindly check it on




*Ogunjirin O.A., O.A. Ojo, O.A. Ola and Nwaobilor Promise


A Tachometer has been defined as a device used to determine the speed of rotation, typically of a shaft or rotating disc, usually measured in revolutions per minute (RPM). The constructed digital tachometer does this by taking advantage of the properties of the Infrared (IR) sensor to detect the body been measured. It also employs some mathematical computations to convert the IR detections to Revolutions per Minutes (RPM) by extrapolating the data. The entire device was built around the ATmega328-p Arduino Micro-Controller Unit (MCU) which uses the embedded C++ programming language. After Performance testing and evaluation of the device against a commercial tachometer a percentage error of 4.165% was observed, which is well within an acceptable range. The device promises several opportunities especially in automation, instrumentation and control as it can readily be put to use in the performance and evaluation of the agricultural processing machines and tractors alike in the center.

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