Mediterranean Journal of Basic and Applied Sciences (MJBAS) Volume 6, Issue 2, Pages 147-153, April-June 2022 ISSN: 2581-5059 www.mjbas.com 147 Design and Implementation of a Sophisticated Metal Detector Used in the Field of Airport Security Fatima Habqa 1* , Khader Salman 2 & Rabei Mustafa 3 1 Master in Industrial Automation, 2,3 Student in Industrial Automation, 1-3 Tartous University, Syria. Corresponding Author Email: fatimahabqa1991@gmail.com* DOI: http://doi.org/10.46382/MJBAS.2022.6214 Copyright: © 2022 Fatima Habqa et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Article Received: 24 March 2022 Article Accepted: 20 June 2022 Article Published: 30 June 2022 1. Introduction A metal detector is an electronic device that detects metals close to it, and of course there are various and a different form of metal detectors belonging to various brands, and each of them has specific features. In the late nineteenth century, specifically in 1881, the first metal detector in history was made by the inventor and scientist Alexander Graham Bell. As for the uses of these devices, they were used in the past to detect mines in the ground, especially during the First and Second World Wars [1]-[2]. The matter did not stop with the invention of the portable metal detector, but the work continued to make metal detectors more convenient and easy to navigate and to make them enjoy modern and advanced features, and the invention of the transistor had a significant impact on the development of metal detectors and transferred them to a completely different space, as the emergence of Modern technologies and microprocessors have led to a qualitative leap in this field, as the design and development process has become simpler, to be used in security fields more widely and with high reliability. In this paper, we talked about metal detectors and primitive techniques and modern techniques used, and we designed a metal detector circuit to study the frequency of some different metals such as aluminum, gold and silver, and compare the practical results with the theoretical results, as it was found that the practical results differ from the results The theory is due to the difference in temperature, the difference in hearing the sound of the device when we find the metal as a result of the difference in the noise ratio, as well as the quality of the device and its sensitivity [3]-[7]. ABSTRACT In this research, we designed and implemented an advanced metal detector based on the Atmega328p microprocessor; it is used in the security field to prevent the entry of dangerous metal tools or explosives to places that require a high degree of safety such as schools, airports, universities and commercial malls. Where the mechanism of the electronic scheme of the detector was understood, including what it contains of active and passive electronic components, the microprocessor used how to program it and its technical specifications were identified. After that, we converted the electronic diagram into a printed circuit board (PCB) via easyada.com, And then print this circuit on special paper so that we can transfer it on the copper board, and a special solution was used to remove the copper residues from the board, after that holes were created and the electronic elements were soldered, Moving on to the software part, the Arduino Uno chip was used to act as an ISP programmer, through which the Atmaga328p controller was programmed using AVRDUDESS software, tested with a small coil with a diameter of 1.5cm. The detector gave excellent performance in detecting metal pieces such as copper, aluminum, iron and silver, as well as electrical wires in the walls, where the device screen shows the signal strength of the captured metal as well as the numerical symbol of the metal. It also discovered the presence of a sharp tool hidden in the mouth, shoes or inside the clothes, and the device achieved high performance In discovering metal parts and determining their properties, with an accuracy of 80%. Keywords: Atmega328p, Metal detector, Coil, Metal pieces, Metal numerical symbol.