International Conference on Advances & Challenges in Interdisciplinary Engineering and Management
79
International Conference on Advances & Challenges in Interdisciplinary Engineering and Management 2017 [ICACIEM 2017]
ISBN Website Received Article ID
978-81-933235-1-9 icaciem.org 10 – January – 2017 ICACIEM157
VOL eMail Accepted eAID
01 icaciem@asdf.res.in 28 - January – 2017 ICACIEM.2017.157
Visible Light Communications for Li-Fi Technology Using PWM Signals 1,2,3,4,5,6
Divyalakshmi E1, Pavithra B2, Priya R3, Priyanka S4, Sugashini V5, Vasuki R6 UG Scholars, Department of ECE, Vidyaa Vikas College of Engineering and Technology, Tiruchengode, India
Abstract: Wireless communication is the need of the hour, so there is a huge thirst for improvement of the means of communication. Motivated by the looming crisis of radio frequency (RF) spectrum, light fidelity (Li-Fi) which is a technology attached to the visible light communications (VLC) offers many key advantages and effective solutions to the problems posed in the last decade. Through this technology, data is transmitted by light thanks to the unique properties of white light emitting diode (LED) lamps switching. In this article, we created a scheme of transmission at the base of the pulsewidth modulation (PWM). The information that we are going to transmit in our case is an audio signal generated by a mobile phone. We create a saw tooth signal that we compare with our audio signal in order to create a PWM signal. Then this modulated signal will be transmitted by LED in the form of a light signal that the photodiode (PD) detects and transforms it into an electrical signal. Finally, we demodulate the signal obtained by a simple first-order low-pass filter RC to receive the demodulated in the speakers and therefore the maximum frequency of the transmission is 87 KHz.
ISBN Website Received Article ID
978-81-933235-1-9 icaciem.org 10 – January – 2017 ICACIEM158
VOL eMail Accepted eAID
01 icaciem@asdf.res.in 28 - January – 2017 ICACIEM.2017.158
A Study on Sixth Sense – Future Mini Embedded Computer Vignesh Waran T1, Elangovan P2, Karthick Raj3, Suresh S4, Jayaprabhu S5, Kanakaraj R6 Department of ECE, Vidyaa Vikas College of Engineering and Technology, Tiruchengode, India
1,2,3,4,5,6
Abstract: Sixth Sense is a wearable gestural interface device developed by Pranav Mistry, a PhD student in the Fluid Interfaces Group at the MIT Media Lab. It is similar to Tele-pointer. The Sixth Sense prototype comprises a pocket projector, a mirror and a camera contained in a pendant like, wearable device. Both the projector and the camera are connected to a mobile computing device in the user’s pocket. The projector projects visual information enabling surfaces, walls and physical objects around us to be used as interfaces; while the camera recognizes and tracks user's hand gestures and physical objects using computer vision based techniques. The software program processes the video stream data captured by the camera and tracks the locations of the colour markers (visual tracking fiducially) at the tip of the user’s fingers. The movements and arrangements of these fiducially are interpreted into gestures that act as interaction instructions for the projected application interfaces. Sixth Sense supports multi-touch and multi-user interaction. This paper is prepared exclusively for International Conference on Advances & Challenges in Interdisciplinary Engineering and Management 2017 [ICACIEM 2017] which is published by ASDF International, Registered in London, United Kingdom under the directions of the Editor-in-Chief Dr K Samidurai and Editors Dr. Daniel James, Dr. Kokula Krishna Hari Kunasekaran and Dr. Saikishore Elangovan. Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage, and that copies bear this notice and the full citation on the first page. Copyrights for third-party components of this work must be honoured. For all other uses, contact the owner/author(s). Copyright Holder can be reached at copy@asdf.international for distribution.
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