scholarly journals A Portable, Inexpensive, Nonmydriatic Fundus Camera Based on the Raspberry Pi® Computer

2017 ◽  
Vol 2017 ◽  
pp. 1-5 ◽  
Author(s):  
Bailey Y. Shen ◽  
Shizuo Mukai
Keyword(s):  
Healthcare Professionals ◽  
Liquid Crystal Display ◽  
Light Emitting Diode ◽  
Raspberry Pi ◽  
Fundus Images ◽  
Light Emitting ◽  
Total Cost ◽  
Fundus Camera ◽  
Indirect Ophthalmoscopy ◽  
Retinal Photography

Purpose. Nonmydriatic fundus cameras allow retinal photography without pharmacologic dilation of the pupil. However, currently available nonmydriatic fundus cameras are bulky, not portable, and expensive. Taking advantage of recent advances in mobile technology, we sought to create a nonmydriatic fundus camera that was affordable and could be carried in a white coat pocket. Methods. We built a point-and-shoot prototype camera using a Raspberry Pi computer, an infrared-sensitive camera board, a dual infrared and white light light-emitting diode, a battery, a 5-inch touchscreen liquid crystal display, and a disposable 20-diopter condensing lens. Our prototype camera was based on indirect ophthalmoscopy with both infrared and white lights. Results. The prototype camera measured 133mm×91mm×45mm and weighed 386 grams. The total cost of the components, including the disposable lens, was $185.20. The camera was able to obtain good-quality fundus images without pharmacologic dilation of the pupils. Conclusion. A fully functional, inexpensive, handheld, nonmydriatic fundus camera can be easily assembled from a relatively small number of components. With modest improvements, such a camera could be useful for a variety of healthcare professionals, particularly those who work in settings where a traditional table-mounted nonmydriatic fundus camera would be inconvenient.

Items Searching in Factory Warehouse Using Arduino Module

2019 ◽  
Vol 1 (1) ◽  
pp. 1-14
Author(s):  
Tan Liong Ching ◽  
Nureize Binti Arbaiy
Keyword(s):  
Inventory Management ◽  
Liquid Crystal Display ◽  
Light Emitting Diode ◽  
Storage System ◽  
Voice Recognition ◽  
Inventory System ◽  
Search Process ◽  
Light Emitting ◽  
Recognition Function ◽  
Light Function

The smart store system (F3 Storage System) provides an inventory system function, and is supported by voice recognition for items searching purpose in the warehouse. This system is aimed to improve effectiveness in item searching process for the warehouse management. An inventory system structures is employed in this system to enable items management. Voice recognition facility helps the worker to search item in an effective way. Worker can use voice recognition function to search the item in the warehouse, and searched information of the item will be displayed in the liquid crystal display (LCD) screen. Meanwhile, the location of the item will be physically indicated by the light emitting diode (LED) light function. The developed system also contains a barcode system to enhance the process of scheduling warehouse activity. Such facilities will enhance the capabilities of existing inventory management systems in warehouses. Prototyping model is used to assist project development. Arduino technology is used to enable integrated hardware and software to read data or input. With Arduino technology, traditional search items by using text and search functionality are enhanced to allow speech functionality. This functionality makes the search process faster and more efficient.

Characteristics of thin film transistors fabricated employing various sequential lateral solidification poly-Si microstructures

2004 ◽  
Vol 19 (2) ◽  
pp. 481-487 ◽  
Author(s):  
Ji-Yong Park ◽  
Hye-Hyang Park ◽  
Ki-Yong Lee ◽  
Ho-Kyoon Chung
Keyword(s):  
Thin Film ◽  
Thin Film Transistors ◽  
Liquid Crystal Display ◽  
Light Emitting Diode ◽  
Superior Performance ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Average Value ◽  
Sequential Lateral Solidification ◽  
Device Properties

Sequential lateral solidification (SLS) is known to be a promising method to make low-temperature poly-Si thin film transistors (LTPS TFTs) with superior performance for fabrication of highly circuit-integrated flat panel displays such as TFT liquid crystal display and TFT organic light-emitting diode. The dependence of TFT characteristics on the details of the SLS poly-Si microstructures was studied by varying the size, direction, and shape of the grains by applying different SLS crystallization mask patterns and processing details. The TFTs results demonstrated that various device properties and characteristics are obtained depending on the specifics of the microstructures. Nearly direction-insensitive TFTs of mobility about 300 cm2/V·s (within 5% variation of average value) were successfully fabricated by controlling the microstructures. Such a characteristic is recognized as being desirable for an optimal integration of the peripheral circuits.

scholarly journals RANCANG BANGUN SISTEM MONITORING KEAMANAN RUMAH BERBASIS WEB MENGGUNAKAN RASPBERRY PI B+ SEBAGAI SERVER DAN MEDIA KONTROL

2016 ◽  
Vol 19 (1) ◽  
pp. 22
Author(s):  
Muhammad Khoiru Syabibi ◽  
Arkhan Subari
Keyword(s):  
Monitoring System ◽  
Light Emitting Diode ◽  
Web Server ◽  
Remote Access ◽  
Raspberry Pi ◽  
Web Based ◽  
Light Emitting ◽  
Security Monitoring ◽  
Home Security ◽  
Security Monitoring System

Muhammad Khoiru Syabibi, Arkhan Subari  in this paper explain that Along with the progress of era, the development of advanced technology also impacts on the development of security systems. Sophisticated security systems that digitally integrated has been growing, one of them is a web-based security system. This web-based home security monitoring system uses a raspberry pi b + that serves as a server and media controller, then for the web programming, it uses HTML, CSS and Javascript. This web-based home security monitoring system home uses a webcam (web camera) that functions like CCTV which can be monitored via a web browser, magnetic switch as security detector, keypad as access control to turn off security monitoring system for 10 seconds, and the buzzer and LED as security indicators. When someone enter the house, he/she must press the keypad. If keypad input is correct according to the passcode then the LED will turn off, indicate that home security monitoring system off for 10 seconds. If he/she enter the house without pressing the keypad according to the passcode then when the door opens, a switch magnetic will active, then buzzer will sound and the indicator on the web will change, indicate that he/she is a person who will do the crime.Keyword : raspberry pi b+, webcam, magnetic switch, keypad, buzzer and LED. ReferencesAndre. 2014. Sejarah PHP dan Perkembangan Versi PHP. http://www.duniailkom.com/sejarah-php-dan-perkembangan-versi-php.Apache Software Foundation. About the Apache HTTP Server Project. http://httpd.apache.org/ABOUT_APACHE.html.Arfa. 2014. Akses Kontrol Kendaraan Bermotor Roda Empat Menggunakan Password dan Sensor. Skripsi. Jakarta: STMIK Raharja.Aziz, Abdul. 2012. Pengertian, Fungsi, Serta Cara Kerja Web Server. http://www.dedeerik.com/pengertian-fungsi-serta-cara-kerja-web-server.Baharudin, M. 2011. Pengertian Website. http://www.naevaweb.com/pengertian-website/arsip.html.Cox, Tim. 2014. Raspberry Pi Cookbook. Birmingham: Packt Publishing.Embedded Linux Wiki. Raspberry Pi, Low-level Peripherals. http://elinux.org/RPi_Low- level_peripherals.Embededdlinux. Raspberry Mode B-Block diagram. Diunduh http://embeddelinux01.com.Faizal. 2011. Prinsip Kerja Piezoelectric. http://www.insinyoer.com/prinsip-kerja-piezoelectric.Friedl, Stave. 2015. Secure Linux/Unix Access With Putty and Open SSH. http://unixwiz.net/techtips/putty-openssh.html/2015.Gudang Linux. 2011. Python. http://gudanglinux.com/glossary/python.Gurevich, Vladimir. 2011. Electric Relays: Principles and Applications. London: CRC Press.Harian Android. 2014. Pengertian dan Fungsi SD Card. http://www.harianandroid.com/2014/04/pengertian-dan-fungsi-sd-card.html.Heranudin. 2011. Rancang Bangun Sistem Keamanan Ruangan Menggunakan Radio Frequency. Skripsi. Depok: FT UI.Iswan, Agusta. 2012. Sistem Proteksi Brankas Berpassword Menggunakan Magnetic Doorlock sebagai Penggerak Doorstrike Berbasis Mikrokontroller. Tugas Akhir D3 Teknik Elektro. Semarang: FT UNNES.Kho, Dickson. 2012. Dioda dan Fungsi Dioda. http://teknikelektronika.com/-dioda-fungsi-dioda.Kho, Dickson. 2012. Pengertian LED (Light Emitting Diode) dan Cara Kerjanya. http://teknikelektronika.com/pengertian-led-light-emitting-diode-cara-kerja.Kho, Dickson. Pengertian Resistor dan Jenis Resistor. http://teknikelektronika.com/pengertian-resistor-jenis-jenis-resistor.Komponen Elektronika. 2011. Rangkaian Buzzer. http://komponenelektronika.com/rangkaian- buzzer.html.MS-1 Magnetic Door Switch datasheet. http://www.braude.ac.il/files/departments/electrical_electronic_engineering/labs/data_pages/p3.pdfNasih, Muhammad Usman. 2013. Alat Pengaman Kendaraan Bermotor Menggunakan Password dan SMS. Tugas Akhir. Yogyakarta: STMIK El Rahma.Özcan, Yakut. 2014. Piezoelektrik.Paul Malvino, Albert. 2010. Prinsip-Prinsip Elektronika. Jakarta: Erlangga.Pemrograman Komputer. 2012. Petunjuk Praktikum Pemrograman Komputer. Semarang: D3 Teknik Elektro UNDIP.Prayitno, Indra. 2010. Kupas Tuntas Malwar. Jakarta: Elex Media Komputindo.Raspberry Pi Fondation. GPIO Raspberry Pi Model A dan B. https://www.raspberrypi.org/documentation/usage/gpio/2009Raspberry Pi Fondation. Setting Up And Apache Web Server On A Raspberry Pi. https://www.raspberrypi.org/documentation/remote-access/web-server/apache.md.Raspberrry Pi Fondation. SSH Using Windows. http://raspberrypi.org/documentation/remote-access/ssh/windows.md/2014Richardson, Matt dan Shawn Wallace. 2015. Make: Getting Started with Raspberry Pi. Sebastopol: Maker Media.Robinson, Andrew dan Mike Cook. 2014. Raspberry Pi Projects. Chichester: John Wiley & Sons Ltd.Rohiman, Ao. 2011. Pengertian dan cara kerja router.http://www.catatanteknisi.com/2011/05/pengertian-cara-kerja-router.html.Sidik, Betha. 2011. Javascript. Jakarta: Informatika.Wahyu. Pengertian Webcam dan Fungsinya. http://wahyu.blog.fisip.uns.ac.id/2011/12/06/pengertian-web-cam-dan-fungsinya.Wikipedia. Secure Digital. https://en.wikipedia.org/wiki/Secure_Digital#Micro. 

scholarly journals PEMROGRAMAN DAN FLOW DESIGN UNTUK RANGKAIAN LAMPU LIGHT EMITTING DIODE (LED) BERBASIS RASPBERRY PI 3B MENGGUNAKAN NODE-RED PADA RANCANG BANGUN GREENHOUSE AUTOMATION SYSTEM (GAS)

2020 ◽  
Author(s):  
Muhammad Azmi Rafly
Keyword(s):  
Internet Of Things ◽  
Light Emitting Diode ◽  
Raspberry Pi ◽  
Automation System ◽  
Light Emitting

Iklim yang cenderung sulit untuk diprediksi secara langsung membuat para petani sulit memenuhi kuantitas, kualitas dan kontinuitas produksi sehingga belum terealisasi dengan baik atau optimal. Greenhouse merupakan sebuah bangunan kontruksi yang berfungsi untuk menghindari atau memanipulasi kondisi lingkungan agar tercipta kondisi lingkungan yang dikehendaki dalam pemeliharaan tanaman. Dengan memanfaatkan teknologi Internet of Things (IoT) untuk membantu proses perawatan pada tanaman di dalam greenhouse, padahal dengan menggunakan Internet of Things dapat mempermudah petani dalam hal monitoring dan controlling. Monitoring yang dimaksudkan antara lain keadaan udara, air, dan tanah yang ada di dalam ruangan hingga mengontrol nyala lampu UV untuk menggantikan matahari.

Fabrication of High Performance Light Guide Plate and New Design for High Luminance

2010 ◽  
Author(s):  
Takaya Fujimoto ◽  
Kenji Yamashita ◽  
Satoshi Nishida ◽  
Daiji Noda ◽  
Tadashi Hattori
Keyword(s):  
High Performance ◽  
Light Guide ◽  
Liquid Crystal Display ◽  
Light Emitting Diode ◽  
High Luminance ◽  
Light Emitting ◽  
Light Guide Plate ◽  
Guide Plate ◽  
Average Luminance ◽  
Point Light

Recently, LED (Light Emitting Diode) is paid to attention as a new source of light. However, it doesn’t turn to shine on a wide area efficiently because LED is a point light. Then, the method of the light guide plate technology used for the liquid crystal display etc, and use as the LED lighting is examined. A minute reflection dots exists bottom of the light guide plate, system is such that light comes out from the surface because the light that hits the dots break a total reflection condition. In our laboratory, the function of the diffusion seat and the condensing prism seat that is complete parts of the lighting panel was involved by optimizing shape and the arrangement of the dots, and it works on the research of the light guide plate where uniform luminescence is enabled. In the process of study, it has been understood that luminance increases by increasing the number of dots, too. Therefore, an accumulating method of piling up two or more light guide plates was proposed as a method of achieving high luminance for highly effective lighting usage, and the device was analyzed with an optical simulator. As a result of optimization, the average luminance has improved by 15%. We are starting to fabricate this high luminance light guide plate by accumulating method. If this piled light guide plate is completed and luminance is improved in accordance with the simulation, it will be possible to convert it to a higher luminance light guide plate.

Fabrication of an organic light-emitting diode inside a liquid crystal display

2013 ◽  
Vol 545 ◽  
pp. 471-475 ◽  
Author(s):  
Jiun-Haw Lee ◽  
Wei-Fu Chang ◽  
Cheng-Che Wu ◽  
Chi-Feng Lin ◽  
Jiunn-Yih Lee ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystal Display ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light

scholarly journals Database Management using Embedded System and CAD

2018 ◽  
Vol 7 (3.1) ◽  
pp. 191
Author(s):  
Anitha Mary M ◽  
Bharathy R ◽  
Jhanani Shree U ◽  
Richard Jebasingh S
Keyword(s):  
Embedded System ◽  
Radio Frequency ◽  
Radio Frequency Identification ◽  
Electromagnetic Waves ◽  
Liquid Crystal Display ◽  
Light Emitting Diode ◽  
Contact Method ◽  
Light Emitting ◽  
Rfid Tag ◽  
Frequency Identification

An aim of this paper is to use Radio Frequency Identification (RFID) technology in facilitating efficient file management system. RFID is an abbreviation of radio frequency identification, RFID was poised to take off and become a standard piece of library technology. An RFID transmitter is also needed to capture the radio frequency signal from the tag for turn out to be giving out by the RFID reader. Therefore RFID has been referred to as “a non-contact method of using radio frequency electromagnetic waves for communication between two remote entities”. An Objective of this paper is to design 3D modeling of file rack using Creo software, manage the files using RFID tag, read the files from RFID using microcontroller through embedded code and to display the files using 16x2 Liquid Crystal Display and 4x4 keypad. The position of the files in the rack will be identified using Light Emitting Diode.  

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