Diode

Draft Monday Oct 20 The Ways of the Chemist Chemist – Bohr Current event –White light-emitting diodes lamps save energy Investigation a. Background i. Bohr [From Purdue article (includes assumptions, equation, what Bohr showed, limits) http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch6/bohr.html] From Purdue article (includes assumptions, equation, what Bohr showed, limits) http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch6/bohr.htmlf UTK incl experiment Balmer Rydberg http://www

you find the value of Planck’s constant. Experiment / Materials and Methods Apparatus: Circuit board LED’s blue to infrared Resistor in series on circuit board 100Ω Smartphone camera Procedure: Firstly set up apparatus, then connect the diodes one at a

Arduino Uno R3 is a microcontroller board. It has 14 digital input/output pins. 6 analogue inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header and a reset button. It is much more user friendly to use. When using an Arduino it simplifies a large amount of work that needs to be done in order to get a running system.The Arduino hardware platform already has the power and reset circuitry setup as well as the circuitry to program and communicate with the micro over USB. The

Introduction Data transfer from one device to another has become an extremely important task of our daily life, using our phones to send pictures or connecting our laptops to the internet and quite more examples in our daily life have become dependent on this connection, hence researches and huge investments are being forward to better the quality. The current technologies, which are mainly radio waves, offer slow connection when the bandwidth is shared on multiple connections, ergo the user can

LI-FI (Light Fidelity)-The future technology in wireless communication Pooja Abhnag1, Pratima Tarte2 Department of Electronics & Communication Dr. D. Y. Patil Polytechnic Address 1poojaabhnag13@gmail.com 2tartepratima@gmail.com Abstract— Li-Fi is a new wireless communication technology which enables a wireless data transmission through LED light. Li-Fi is based on a unique ability of solid state lighting systems to create a binary code of 1s and 0s with a LED flickering that is invisible

eye cannot detect, so the result in form of light appears constant and hence offering connectivity. More sophistication in the transmission techniques can further maximize the transfer of data rate through VLC. Till now this technique was implemented through white LED bulbs only but groups at the University of Oxford and the University of Edinburgh are focusing on parallel data transmission by the use of multiple LEDs or array of LEDs, where each LED allows a different stream of data. Mixtures of

Have you ever wondered were led lights came from..? well I Daniel Mcfarland was born in Pennsylvania on February, 27 1869 and attended Lehigh University for college from 1884-1889. I studied electrical engineering, After experimenting with different sources, I started using glow discharges to produce light. In 1986 I had devised a glow discharge lighting system, creating an extension to the Geissler tube. The lamp utilized nitrogen and carbon dioxide as the luminous gas because they emitted a soft

1 I still remember the days in my universities as if it were yesterday. In those days I worked with lot of national and international organizations, which are working in varied sectors and bringing change by modern methodologies. In second year of my under-graduate, I founded a Non-Governmental Organization named Fep-Si (Forum for Empowering people through Social Innovation and Entertainment) and worked with another organization named Alexis Foundation as research associate for designing public policy

Efficiency: There are about 1.5 billion base stations globally. A huge amount of energy is consumed by these base stations, especially to cool the base stations. These base stations have an efficiency of 5% only. But li-fi uses LED (Light emitting diode) which are highly energy efficient. 3.) Availability: We can use li-fi in places where radio waves can cause hazardous interference like flights, hospitals and petrochemical plants etc. 4.) Security: Radio waves can be easily intercepted. IV DISADVANTAGES

wound healing, retinoprotection, and skin rejuvenation ( – ). PBM is performed with red to near-infrared (NIR) light, ranging in wavelength from 630 to 880 nm ( ). Lasers have traditionally been the sole light source of PBM, but the light-emitting diodes (LEDs) have recently been implemented, with several advantages. In addition to being less expensive, LEDs are non-coherent, allowing for a wider bandwidth and more diffuse light, and making them safer than coherent lasers (