TISHITU LI-Fi VLC (Visible Light Communication) Data Communication Through LED
Tishitu explains I found Beautiful concept to communicate two PC or Laptop with some RS-232 Communication simulator or software like Hyperterminal by VLC (Visible Light Communication) , technique LI-fi Components :- U3 Voltage Regulator:- 7805 B1 Battery :- 9V Photo transistor L14G1 OP505A Schmitt-Trigger IC 7414 Hex Inverter U2:A U2:B U2:C U2:F Preset/ Variable resistor RV1 10k or 20k LED D1 White Transistor Q1 BC-548 Diode D2 D3 1N4001-1N4007 IC U1 Max 232 Capacitor C1,C2, C3, C4, C5 - (0.1uf) Resistance R1- 1k, R2-10k DB9 Connector for PC communication ABSTRACT:- Li-Fi Communication technique is not new technique, as well we know for a long decade we are using optical laser communication lines with laser in fiber optical wires . It is made up of pixela glass or fiber glass where laser light cant escape and travel through it by TIR (total internal reflation) so it is VLC (visible light communication) too.. Now day LED (Light Emitting Diodes) are having enough switching capabilities of switching where can transfer a data in higher speed , in MBPS to GBPS. Well Our Aim is to demonstrate Li-Fi (Light fidelity) in a very simple manner how it works. Application:- 1. Imagine when you traveling and road lights gives you position on your mobile and computer display in car what is nearby , 2. Two cars can communicate with each other and can give you traffic density further ahead on road 3. In museum for scholars they can go to LiFi audio / Data region to collect information about monument or object at spot of light 4. In day and Night through Infrared and Visible light you can work without interruption ie. light is on or off 5. Give your garage gate to open or close instruction with your car head light encrypted data instruction to open 6. Imagine you are sitting in park , malls , railway station, airport , Public Places .... and doing internet playing games , communicating neighbors , finding in malls every gate what they have in there visible light regions 7. Charging your phone with light through solar modules and at same time working uninterrupted with power supply all time 8. Funny But Listening Radio / Announcements in colleges / Malls Public places 9. Under Water in Submarines , water divers can communicate in line of site , instead of gestures Working :- 1. Receiving :- Likely in above circuit through Photo transistor LED feed in there is fluctuations or i can say through Rs-232 communication protocol relevant signal are cumming where Light switch on and of in higher speed where human eye cant detect there switching , these data switch/trigger Schmitt-Trigger IC 7414 Pin1 and invert to pin 2 and again 3 to revert process . we are doing this to amplify signal to first stage Pin2 and make amplified signals with reduced noise original signal to pin 4 then signal gose to pin 11 of max-232 ic where high voltage / uneven signals processed to TTL level of 5V processed and out to pin 14 of max-232 IC where it is connected with receive (RX) pin 2 of DB9 connector Now these signal are ready to process by application or simulators like Hyperterminal which is set by 2400 baud rate or high/low in both computers. like in video both computer are set in transmit and receive mode Transmit:- Through DB9 pin no. 3 output data in Low current -15 to +15V (by computer original not USB to serial converter) or by USB to Serial converter 5v to Max-232 IC pin 13 where signal convert to TTL level 5V to further circuit require .. through pin 12 we ge TTL output and feed to buffer noise free output at pin 8 of 7414 where it is connected to base of transistor for very high current and voltage amplification which can drive LED .You can take high voltage/current mosfet to drive hundreds of LED to transmit a data as well, Now Circuit is Ready to transmit Download:- http://www.mediafire.com/download/849... Please follow link below how to install and configure Hyperterminal • TISHITU Hyper Terminal Installation for wi... TISHITU ISO: 9001-2008 RESEARCH AND CONSULTANCY CELL OF INDUSTRIAL APPLICATION A Joint Accreditation System of Australia and New Zealand Copyright © All Rights Reserved www.tishitu.net, [email protected] Reg No.08122629691/SSI Accreditation No. M3111204IN ~-~~-~~~-~~-~ Please watch: "Lifi Communication by Arduino UNO Download Project" • Lifi Communication by Arduino UNO Download... ~-~~-~~~-~~-~
