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please help me in usb
im new comer to usb, the standards spec is too huge, long as 650 pages. after reading some portions of it, i just know some basic concepts like packets, pipe, endpoints..., but could not get the big picture for the operation of usb. could any one hav...
ASIC Design Methodologies & Tools (Digital) :: 28 Oct 2009 9:49 :: niravbhatt :: Replies: 6 :: Views: 387
arm powered embedded system design
pantech r&d wing clings to an interesting and encouraging agenda for arm based comprehensive workshop that introduces the current arm family development systems. the workshop familiarizes the delegates with current popular arm architectures (arm7 and...
Upload temp :: 28 Oct 2009 7:55 :: ngsrinivasan :: Replies: 0 :: Views: 180
future vlsi ?
hi every one...i came to know that nowadays most of the companies are not running any projects because they r not getting any projects.for eg. in tata elxi for past 2 and half months no vlsi projects is running.is this is true....if this is the case ...
ASIC Design Methodologies & Tools (Digital) :: 28 Oct 2009 5:38 :: niravbhatt :: Replies: 18 :: Views: 1485
rf to dc regulator design
hi. yall my chip of wireless sensors will be fed by rf signal (by inductive coils). i am now stuck at design for rf to dc regulator (2.5v vdd generation). my charge pump multiplies voltage and provides unregulated dc with small ripples. this dc varie...
Analog IC Design & Layout :: 27 Oct 2009 16:02 :: florescent :: Replies: 2 :: Views: 129
inductive resonance wireless power
hi everyone, i hav a project which involve using inductive resonance to produce wireless energy and then create a cell phone charger using that.the problem now i faced is i have difficulties getting the power transfer efficiently.wat i have done is, ...
Hobby Circuits and Small Projects Problems :: 26 Oct 2009 7:04 :: sajal1975 :: Replies: 1 :: Views: 123
"back-off" for power amplifier
in some articles it said the power back-off for the power amplifier can conserve battery power and avoid to cause interference in the adjacent channels. it also says the efficiency will be reduced? why?could someone advise what back-off mean here?ple...
RF, Microwave, Antennas and Optics :: 25 Oct 2009 17:40 :: cnuchcnu :: Replies: 5 :: Views: 511
please help! lights and batteries....what do i do?
sorry for the possibly vague subject, i am new to all this. my problem....i am trying to do a romantic night with the lady friend and i want to run alot of lights in the middle of no where. no access to household power or generator etc... can i run a...
Electronic Elementary Questions :: 25 Oct 2009 12:57 :: betwixt :: Replies: 8 :: Views: 360
interfacing zigbee with microcontroller..
im and final year electronics engineering student. im designing a wireless monitoring and control system..... there will be a master which will monitor and control slaves located in various locations in radius of max 300m. my master will be an arm p...
Network :: 23 Oct 2009 18:44 :: swanandthegreat :: Replies: 0 :: Views: 195
cross layer optimization for ofdm wireless network
hi everyone i am verifying the results of a research paper cross layer optimization for ofdm wireless network.can anyone help me in plotting the graph between average utility and snr value?any kind of help regarding this paper is welcomed....
Digital communication :: 23 Oct 2009 15:16 :: akgakgakgmnnit :: Replies: 0 :: Views: 81
send several bytes via gprs - sim300
hi,i want to send several bytes via gprs with sim300.but i dont know how to initialized this module with at commands.i searched in the net and found a series command but i cant send data with none of them.if someone has been able to initialize gprs w...
Microcontrollers :: 23 Oct 2009 8:08 :: jagrut911 :: Replies: 18 :: Views: 1518
fundamentsl of wireless communicaions
hi friends,i need the solution manual of the book fundamentals of wireless communications by david tse.please forward it to me.please . please i need it badly.thanx...
Digital communication :: 23 Oct 2009 7:01 :: Communications_Engineer :: Replies: 8 :: Views: 2898
mimo sc-fdma of 3gpp lte
hi all!it is well-known that 3gpp lte standard adopts mimo transmission for downlink ofdma, but mimo also can be used in conjunction with sc-fdma for uplink transmission.i want to know wheather 3gpp lte standard have adopted mimo for sc-fdma.if it i...
Digital communication :: 21 Oct 2009 2:16 :: kongfuzi :: Replies: 4 :: Views: 408
go to school at uc berkeley for free
i am a student at berkeley and am also half polish, so it is only natural to want to help you guys! berkeley is expensive, but they are very nice about posting all class notes and homeworks in pdf. if you put effort into learning these courses (eve...
Electronic Elementary Questions :: 20 Oct 2009 10:31 :: jameswong227 :: Replies: 56 :: Views: 11562
audio power amplifier
i just want to ask how to make an audio power amplifier (class b) on final stage to drive a load of 4 or 8 Ω to output power of 30 w? thank you. its for a project. im quite confuse with the circuit i have. thanks again!:d...
Hobby Circuits and Small Projects Problems :: 20 Oct 2009 8:45 :: FvM :: Replies: 21 :: Views: 921
warpdrives - ontopic links collection
are there any types of the following devices that implement warpdrives.instrumentation: rf, wireless, microwave, optical, photonic, fiber optic, laser, electromagnetic, plasma, holographic, electro optic, optoelectronic, gps.http://www.google.ca/sear...
Analog Circuit Design :: 19 Oct 2009 22:56 :: betwixt :: Replies: 2 :: Views: 156
sim300s modem meet problem when register with simcards
currently, our sim300s modem come with problem when register simcards. this issue is like follow: simcard works with mobile phones and siemens gsm modems. it has problem working with sim300s modules. when we first put the simcard to the modem with wo...
Professional Hardware and Electronics Design :: 17 Oct 2009 13:53 :: moyoumin :: Replies: 2 :: Views: 162
a question on the xtal osc deisgn
hiwe are deisgning a 35mhz xtal osc. the attached file is the schematic of the ciruit we used. it is a typical cross-coupled oscillator.the negative impedence anlaysis is ok. but i can not make it oscillate.would anyone pls. tell me any wrong with th...
Analog IC Design & Layout :: 17 Oct 2009 4:05 :: chang830 :: Replies: 13 :: Views: 567
gprs modem interface proceduer
i am starting to design a telemetry system using sms. any sugestions about gsm modules? thanks in advance....
Professional Hardware and Electronics Design :: 17 Oct 2009 3:44 :: printed circuit girl :: Replies: 191 :: Views: 52537
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free energy source from radio signal?
http://www.edaboard.com/files-eboard/capture_6324.jpgi would like to have an antenna, and then drain the current that oscilates in the antena i think ac? and store it in capacitors or batteries.. because the antenna is picking random radio frequencye...
Electronic Elementary Questions :: 16 Oct 2009 4:39 :: flatulent :: Replies: 3 :: Views: 201
simcom module and wireless modem price adjusted
dear friends, nice to meet you all in edaboard. im neo from popular communication. our company is the largest simcom wireless module distributor in china. we have engaged in wireless module field since 2001. currently our gsm module price had been ad...
EDA Jobs, Promotions, Advertising :: 15 Oct 2009 6:38 :: moyoumin :: Replies: 0 :: Views: 198
help with wiring a voltage regulator
hello and tia!im trying to power a wireless camera off of a battery pack. but in doing so ive found out that it goes through batteries pretty quickly and so i started learning about them. so i am trying to use rechargeable batteries but have need of ...
Electronic Elementary Questions :: 14 Oct 2009 22:56 :: GhettoBSD :: Replies: 23 :: Views: 570
seeking 100-150 meter communication solution
i apologize in advance, my knowledge of electronics and radio communication is extremely rudimentary and i have no formal education in either, but im seeking advice on a project im working on, and any input is greatly appreciated.im trying to figure ...
RF, Microwave, Antennas and Optics :: 14 Oct 2009 21:37 :: relic180 :: Replies: 3 :: Views: 189
ecg simulator circuit
:idea: ecg simulator circuit explained.[/b]...
Other Design :: 14 Oct 2009 17:49 :: jajomafa :: Replies: 14 :: Views: 13588
help me: phd looking for a rf filter/diplexer design job
b. i can professionally use hfss, cst and matlab, and primarily use ads. i have over 10 years design experience in rf filter design, incl. coaxial, helical, tunable, high power. also a senior wireless signal processing position is good for me...
EDA Jobs, Promotions, Advertising :: 14 Oct 2009 15:19 :: cwjcwjcwj :: Replies: 1 :: Views: 270
1st international conference on intelligent systems
call for papers, submission deadline: 30 october 2009.1st international conference on intelligent systems, modelling and simulation, isms2010 27 - 29 january 2010, liverpool, uk.conference website: ww...
General :: 13 Oct 2009 8:15 :: salma ali bakr :: Replies: 0 :: Views: 195
gsm ,gps modules in china?
hiis there companies in china that sell gsm,gps modules ,please send their web site link....
Business Special Interest Group :: 13 Oct 2009 5:00 :: moyoumin :: Replies: 11 :: Views: 2698
simcom module and wireless modem price adjusted
dear friends,nice to meet you all in edaboard. im neo from popular communication. our company is the largest simcom wireless module distributor in china. we have engaged in wireless module field since 2001. currently our gsm module price had been adj...
Business Special Interest Group :: 13 Oct 2009 4:45 :: moyoumin :: Replies: 0 :: Views: 201
full duplex audio and text communication system rf system
i want to make a rf based full duplex audio and text communication system plz can anyone help me...
Digital communication :: 12 Oct 2009 11:16 :: krnmore :: Replies: 2 :: Views: 298
interface pic 16f877a with mrf24j40ma picdem rf tranceiver !
hello everyone !!.............i want to interface pic16f877a with mrf24j40ma picdem rf transceiver !...........can you please tell me how i can interface ???............also tell me which pins and ports of pic 16877a are used and connect to which pi...
Microcontrollers :: 11 Oct 2009 21:08 :: Salman_Engineer :: Replies: 2 :: Views: 402
pwm module for pic 16f737
hello all ...at first, sorry for my bad english...im get started to use pic 16f737 and i need some help with this pic...if someone can help ill be very happy...-someone have any good beginner tutorial that can help me with the pic 16f737, (about the ...
Microcontrollers :: 11 Oct 2009 21:04 :: wp100 :: Replies: 3 :: Views: 294
rf transceiver ic for remote keyless entry
hi all, i am researching and designing about wireless switch for remote entry keyless. i need some circuits about this and one rf ic transceiver in ( tssop or lqfp or smd ) packageand low costany help would be appreciated....
Digital communication :: 11 Oct 2009 13:59 :: shoja :: Replies: 0 :: Views: 72
problem with wireless serial transmisson
hi, i am doing school project and have encountered a problem when using t5/r5 module and pic16f877 usart feature for rf communication.datasheet for t5/r5 module and my schematics are attached. basically, the route is t5 tx pin -> pic tx -> transmissi...
Hobby Circuits and Small Projects Problems :: 11 Oct 2009 12:37 :: Tracy Chin :: Replies: 6 :: Views: 462
tx and rx raised cosine filter in wireless channel
greetings ,i am simulating a simple wireless channel consisting of only bernoulli random generator- tx raised cosine filter -awgn channel rx raised cosine filter but the output is very distorted , i have kept both the filter roll off factor to 0.2 t...
Digital communication :: 09 Oct 2009 10:50 :: shamma :: Replies: 0 :: Views: 114
about the simulation of sc-fdma-mimo
hi allwant to simulate the sc-fdma-mimo system which is sc-fdma and with stbc of 2x1 antenna structure i have wrriten a matlab code of stbc-2x1 system,but have some decoding problems when add the dft-precodingis anyone have this sc-fdma-mimo code ?i ...
Digital communication :: 09 Oct 2009 4:02 :: kongfuzi :: Replies: 2 :: Views: 303
serial port transmission pic18f4620
can i have direct acces on the bits trasmitted to serial port? if i wanted to transfer 1011 on the serial port, can i make a program in c# which only transmits those bits (those are bits, not characters)? or the serial port just transmits ascii chara...
PC Programming and Interfacing :: 08 Oct 2009 18:00 :: mannnish :: Replies: 22 :: Views: 2012
set of circuits for new project - guidance would be great!
i am a product designer by trade an occasionally take on a project with electronic aspects, this project is by far the most complex ive attempted.in short, i am trying to wirelessly charge (inductive) a flashlight that will contain nimh batteries, th...
Hobby Circuits and Small Projects Problems :: 07 Oct 2009 22:23 :: idtkid :: Replies: 6 :: Views: 240
wireless application help
hello all,we have a device which gives out serial data at 9600 baud rate. this data has to be transferred to a base computer say atleast 200 feet away wirelessly. my problem we will have atleast 30 such devices all streaming data continously. can any...
Network :: 07 Oct 2009 13:50 :: siongboon :: Replies: 1 :: Views: 189
interface two computers using wireless transceiver
hi all,i am trying to interface two computers (wireless) using rs232(null modem).wired connection works fine (transfer of files working between two computers)!!but there are many issues with wireless transmissioni am using tws434a and rws434a for rf ...
PC Programming and Interfacing :: 07 Oct 2009 11:43 :: hariswaroopkv :: Replies: 0 :: Views: 105
connecting transmitters and receivers to pc
i have an idea to make an circuit which can be connect to computer work as receiverthere are more than two transmitters.the parameters send by transmitters receiveby ckt connected to pc. the parameters can be analysis by software in pc ...
Hobby Circuits and Small Projects Problems :: 06 Oct 2009 18:14 :: rockom :: Replies: 2 :: Views: 168
microstrip patch antenna array 1x2
helloi am designing a 1 by 2 array of microstrip patch antenna.please suggest me some good literature or book on the designing of the array. i am facing problems in designing the microstrip transmission line used to feed power to the antenna elements...
Electromagnetic Design and Simulation :: 05 Oct 2009 17:53 :: Chinaski :: Replies: 1 :: Views: 225
help please select the type of wireless communication
help please select the type of wireless communication for industrial applications (preferably name - the manufacturer, url) to communicate at a distance of not more than 30m, the data rate `100-500 kbaud. communication - point2point - it is necessar...
Network :: 05 Oct 2009 6:09 :: aadvedaboard :: Replies: 1 :: Views: 195
wireless video tx(need help)
i am just planning to create a wireless video transmitter for my robot but i dont know how do this.i am currently using rf modules for transmitting control signal but its bit rate is just approx 8kbps and i know it is not enough to transmit video sig...
RF, Microwave, Antennas and Optics :: 03 Oct 2009 18:17 :: vfone :: Replies: 3 :: Views: 150
rf amplifier at 1ghz- request for resources
hi everyone,i would like to design a rf power amplifier, can anyone suggest any simple circuit to amplify 1ghz rf power?thanks alot....
RF, Microwave, Antennas and Optics :: 02 Oct 2009 6:21 :: emergenbernz :: Replies: 4 :: Views: 198
how to simulate a wireless channel response
i have a home work to write a program to simulate a wireless channel reponse..the detial of the homework is as below: h(t)=Σaiδ(t-τi) where i is index ,a is amplitude of ricain distribution. ...
Software Problems, Hints and Reviews :: 02 Oct 2009 5:29 :: ermai :: Replies: 0 :: Views: 90
free webinar: 60 ghz power amplifier design for wireless hdm
free webinar: 60 ghz power amplifier design for wireless hdmi the emergence of wireless hdmi standard requires advanced design tools and technologies to meet its stringent performance requirements. this webinar will review the ads design tools & meth...
RF, Microwave, Antennas and Optics :: 01 Oct 2009 18:44 :: ADS_Marketing_Manager :: Replies: 0 :: Views: 153
cdma vs gsm
whta are the main differences between the tow systems...
Digital communication :: 01 Oct 2009 7:05 :: usmani :: Replies: 15 :: Views: 2454
new audio-interactive concept
reality sys sa, belgium, designs and manufactures a range of tiny professional audio players/repeaters allowing to add interactive and multilingual information/sounds to any place.we have the pleasure to present the babybox : electronic stand-alone s...
EDA Jobs, Promotions, Advertising :: 28 Sep 2009 15:23 :: realitysys :: Replies: 0 :: Views: 135
wireless nwtwork help (wifi)
dear all; i want to esatblish a wireless network between two locations 350 meters apart @ location a i have two pcs and a dsl connection all wired through lan @ location b i have three pcs wired through a lan but no inter...
Network :: 27 Sep 2009 9:03 :: tanbukhari :: Replies: 1 :: Views: 303
re: wireless switch with rolling code technology
hi all, i am researching about wireless switch with rolling code technology. i need some circuits about this. any help would be appreciated....
Other Design :: 26 Sep 2009 13:29 :: bobcat1 :: Replies: 1 :: Views: 336
pic18 and webcam application on mobile robot
good morning,i am currently thinking of construct a mobile robot equiped with webcam. the webcam is connected to pc through wireless connection. the mobile robot contain pic18 microcontroller. i want to use the webcam to recognize some stactic target...
Microcontrollers :: 25 Sep 2009 20:10 :: anandpv2009 :: Replies: 3 :: Views: 258
urgent need of some advice.
i have a project where i need to transmit some command bits using wireless mode of communication. considering its usage as a mobile surveillance unit, range should not be around 200 m or so.i need advice what options do i have?heres what i was planni...
Hobby Circuits and Small Projects Problems :: 25 Sep 2009 12:40 :: elrayes :: Replies: 3 :: Views: 351
matlab codes from the book: smart antennas for wireless comm
can anyone please give me the matlab codes from the booksmart antennas for wireless communications, by frank grossi have a project to submit any help would be very precious...
RF, Microwave, Antennas and Optics :: 24 Sep 2009 18:23 :: stamford :: Replies: 0 :: Views: 99
interfacing 8051 with infrared or blutooth
hi guys,m working on a project called bus schedule indicator. in dis proj i need 2 identify d buses cuming on a particular stop. i hv 2 options for wireless data transfer i.e. bluetooth and infrared. i want 2 interface either bluetooth or infrared re...
Microcontrollers :: 24 Sep 2009 12:19 :: srikanthsamaga :: Replies: 4 :: Views: 303
ofdm with qpsk (matlab simulation code required)
hi,can i get a matlab simulation code for ofdm implementing qpsk modulation..its urgent plz,,,,...
Digital communication :: 24 Sep 2009 9:51 :: puripong :: Replies: 6 :: Views: 1530
can matlab do event driven simulations
hi, i have a wireless communications project involving queuing management.i have to give inputs to my scheduler the voice is modeled as an on-off process, where the avg duration of on and off periods are set to 2.5 and .5 secs. during the on period, ...
Software Problems, Hints and Reviews :: 23 Sep 2009 17:13 :: carl_chao :: Replies: 2 :: Views: 400
rs 232 wireless serial communication
is half duplex communication is possible with pic16f84 (software uart)i need to develop pic to pic data transferring circuit (wireless).i am using a same frequency rf modules at both sides and i think there is a chance of collision.any one can help m...
Microcontrollers :: 23 Sep 2009 1:38 :: nandhu015 :: Replies: 1 :: Views: 252
need mimo matlab code
im looking for the mimo matlabcode simulationanyone here pls help meregard,...
Digital communication :: 22 Sep 2009 16:17 :: aqil :: Replies: 21 :: Views: 7833
need wsn mac/network advice
hiiam working in aproject with wireless sensor network iam using the nodes to monitor an industrial process i got to use 6-10 nodes my part in the project is to make the network between nodes all the protocols i know was used in large number of nodes...
Network :: 21 Sep 2009 22:26 :: k_general :: Replies: 0 :: Views: 165
pcb design help (315mhz with 1/4 wave dipole)
hi, i have never done rf layout before. this is a really simple board but i would like maximum range. :) i have a transceiver chip and antenna that are both matched at 50ohms and tuned for 315mhz. my problem is how to get a trace from chip to antenna...
RF, Microwave, Antennas and Optics :: 21 Sep 2009 17:22 :: biff44 :: Replies: 5 :: Views: 369
ph. d topic in os/database/web technology - need help
dear friends,i am a lecturer and now looking seriously for a topic in os/database/web technology for the research work.please suggetsthanking you...
Linux Software :: 21 Sep 2009 10:43 :: eld03 :: Replies: 1 :: Views: 391
goofingn off with another transistor problem. slightly diffe
i grabbed this picture, of some site and thought it would be simple to work out, however i cant make sense. does the second 1k resistor to 0v decrease the base current ? if it was meerly a pulldown i would have thought a 10k resistor would do the job...
Electronic Elementary Questions :: 21 Sep 2009 8:26 :: expelleior :: Replies: 14 :: Views: 1055
avr uc wireless link, which is better wifi or bluetooth?
hi guys,doing my final design project and i need to design a wireless link from my avr atmega32 to my pc either using wifi or bluetooth. if u know of any good resources please let me know as well.thanks alot guys!!:d:d...
Microcontrollers :: 20 Sep 2009 18:19 :: nevadayz :: Replies: 0 :: Views: 96
smart antennas matlab
hello, i need some help in matlab coding, i have to design the adaptive beamforming algorithms (lms and nlms) in smart antennas, and compare them in radation pattern and convergence analysis.i got some codes from www.mathwork.com site....but not abl...
RF, Microwave, Antennas and Optics :: 20 Sep 2009 5:07 :: stamford :: Replies: 3 :: Views: 642
wimax thesis
hello i am new to this forum and stumbled upon it quite by accident. i am currently trying to start a thesis on wimax implementation and link budgeting and sadly enough i have no idea about wimax. could somebody direct me on what to read up on? so fa...
Digital communication :: 19 Sep 2009 15:44 :: friendz101 :: Replies: 8 :: Views: 969
need help! why my solar panel will not charge my laptop batt
i had came across many solar charger products whereby they use a battery pack to store the solar energy and charge it to their laptops.i had in mind thay i want to use the solar energy going to through regulator to charge my laptop battery.i am using...
Hobby Circuits and Small Projects Problems :: 18 Sep 2009 17:39 :: willi65 :: Replies: 17 :: Views: 780
scroll bar for data analysis
dear all,i have a small problem with vb.net. i have written a program that records data that comes from a wireless ekg recorder. what i now want is to add the possiblity to open and show the data to the user. i want to draw the wave from in a picture...
PC Programming and Interfacing :: 18 Sep 2009 15:04 :: tomeko :: Replies: 1 :: Views: 150
wireless charger - opinions on the products
dear all: does anyone have relation experience or document http://www.wildcharge.com/index.cfm/fuseaction/category.display/category_id/179/wildcharge_products.htmthis website is some power wirelss charge product . thanks...
Analog IC Design & Layout :: 18 Sep 2009 10:06 :: pranam77 :: Replies: 3 :: Views: 138
i develop projects with microcontroller.
hello!im from brazil and working with development projects with microcontrollers for control and automation. on my site you can see some of the projects that i did. if you want that i develop a project, just send an email to fabioposser@hotmail.com o...
EDA Jobs, Promotions, Advertising :: 18 Sep 2009 7:47 :: thand-s :: Replies: 1 :: Views: 356
rs232 fullduplex communication between 2 8051 controllers
hi .i need help with the following :design, build and demonstrate a wireless communication system.a serial transmission protocol must be designed and implementedon this wireless connection. the protocol must include error control, flow control,framin...
Microcontrollers :: 18 Sep 2009 7:41 :: thand-s :: Replies: 0 :: Views: 201
interfacing microcontroller with pstn
dear all, my project is to make biomedical hand held unit that is used in house. simply, i need to read data from different biomedical sensors via usb port and send it to a microcontroller (task1: i need to choose asuitable controller), then t...
Microcontrollers :: 18 Sep 2009 1:30 :: elrayes :: Replies: 5 :: Views: 348
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