| Search found 119 matches on edaboard.com: tv transmitter rf transmitter transmitter fm transmitter ir transmitter |
38khz transsmitter circuit need help here
any one can help me for this circuit below? is that any problem with this circuit in the link? can anyone tell me?http://www.electronicsforu.com/efyli...i-05-nov04.pdfthe circuit never mention what type of ir led be use, so i just simply buy and use ...
Hobby Circuits and Small Projects Problems :: 21 Nov 2009 11:38 :: FvM :: Replies: 37 :: Views: 1829
stereoscopic video processing, lvds to cvbs: advice needed
i am looking at an imager that has a stereo-mode output when coupled with an lvds chip of 8-bit raw bayer on an 18-bit frame output. i want to convert this to cvbs output and have been told that i should use cpld of some kind, or perhaps fpga. ther...
PLD, SPLD, GAL, CPLD, FPGA Design :: 10 Nov 2009 15:25 :: stereofan :: Replies: 0 :: Views: 39
self learning ir transmitter
hey all,i want to make a self learning infrared transceiver that learns every infrared code.i know, it sounds like i want to step too many ladders.. but is possible right?i am using mikroelektronika mikroc pro for pic compiler.here is my code so far,...
Microcontrollers :: 09 Nov 2009 1:42 :: cebrax :: Replies: 18 :: Views: 696
tv transmitter schematic for all
dear freinds,here im attaching tv transmitter in uhf channel for all of you,please how can make pcb for it.eng.dibagaykurdistan of iraq[/img]...
RF, Microwave, Antennas and Optics :: 19 Oct 2009 11:05 :: vfone :: Replies: 8 :: Views: 432
get 27v ac from 220v ac
hello,i have a pl504 vacuum tube (http://www.r-type.org/pdfs/pl504.pdf) and i need to drive its filament from 220v ac source without using a transformer, so a ballast resistor must be used.the tube filament draws 27v 300mawhat value of resistor do i ...
Electronic Elementary Questions :: 05 Oct 2009 14:49 :: FvM :: Replies: 21 :: Views: 525
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
i need more range in ir
i am using tsop 1738 infrared recieverand a 38khz source using ne555 driving two ir lednow they are place on same pcb the ir rays reflected from the object in front and they are recieved by tsop1738i am maximized led current and i have tried to set f...
Hobby Circuits and Small Projects Problems :: 21 Sep 2009 19:13 :: Audioguru :: Replies: 19 :: Views: 1920
wireless transmitter -need help on how to construct circuit
pls i need help on how to construct this circuit using an antennae.i also need the circuit. thanks...
Hobby Circuits and Small Projects Problems :: 17 Aug 2009 10:26 :: akshay_d_2006 :: Replies: 2 :: Views: 386
infra-red liquid level detector
the design useful in liquid level or proximity detection. it should operate by detecting the distance from the target by reflection of an infra-red beam. it should safely detect the level of a liquid in a tank without any contact with the liquid itse...
Electronic Elementary Questions :: 27 Jul 2009 10:19 :: FvM :: Replies: 41 :: Views: 2106
infra red alarm system help.......
hey there guys,a while ago i managed to get my hands on a couple of old electronics magazines, electronics africa, in it i found an on going article on how to build an infra red alarm system.(picture attached)although it may be an old design, i have ...
Hobby Circuits and Small Projects Problems :: 23 Jun 2009 19:28 :: alarm man :: Replies: 8 :: Views: 501
electronics hobby projects and circuit applications
lf projects which involved electronics in different applications...here are some of the lists of projects:pure class a headphone amplifier20 watts automotive power amplifiercar parking sensorwideband tv amplifier300mw fm transmitterpll fm transmitter...
Hobby Circuits and Small Projects Problems :: 13 Jun 2009 20:40 :: rashedix :: Replies: 11 :: Views: 2403
can lna act as an hpa? tell me basic difference
please tell me the basic difference b/w these two amplifiers. i mean if biasing is same. transistor is same . noise only or some other also.thanx...
RF, Microwave, Antennas and Optics :: 02 May 2009 10:12 :: DaveN :: Replies: 1 :: Views: 177
plz reply me before thursday i have exams plz
1. in a communication system, noise ismost likely to get into the system(a) at the transmitter(b) in the channel(c) in the information source(d) at the destination2. when modulation frequency is doubled,the modulation index is halved, and themodulati...
Electronic Elementary Questions :: 28 Apr 2009 2:54 :: santom :: Replies: 7 :: Views: 1422
simple fm transmitter
hi ! lately iv made a very simple fm transmitter.http://www.aaroncake.net/circuits/fmtrans2.gifmore info:http://www.aaroncake.net/circuits/fmtrans.aspso the reson i made this post is that its working badly. as u see there are 2 inductors and i made t...
Hobby Circuits and Small Projects Problems :: 23 Apr 2009 18:25 :: zlatkoMM :: Replies: 9 :: Views: 2319
electronics projects and circuit applications
lf projects which involved electronics in different applications...here are some of the lists of projects:pure class a headphone amplifier20 watts automotive power amplifiercar parking sensorwideband tv amplifier300mw fm transmitterpll fm transmitter...
Analog Circuit Design :: 02 Apr 2009 8:34 :: Gundam001 :: Replies: 0 :: Views: 378
ati xilleontm 220 video data book
ati xilleontm 220 high definition tv data bookchapter 1: introduction1.1 about this manual................................................................................................................... 1-11.2 ati component part number legend........
Professional Hardware and Electronics Design :: 12 Mar 2009 11:47 :: prakash13 :: Replies: 9 :: Views: 1398
ir led
does the ir led in this circuit lights just like the ir led in a tv remote control?i have tested it but the ir leds does not light when supplied with 5 volts. it looks like it lights when it is supplied with 5 volts as circuit provides....
Hobby Circuits and Small Projects Problems :: 04 Mar 2009 14:43 :: donrigor :: Replies: 17 :: Views: 1011
superimposing a 38khz wave
im working on a ir-rf-ir transmitter, for a tv remote.i took it with me to school and took some screen shots of the remote output, theyre below. its a 3vpp pwm wave with a 1vpp 38khz signal riding on top of it. on the transmitter end im gonna use an ...
Analog Circuit Design :: 21 Feb 2009 6:12 :: tanky321 :: Replies: 2 :: Views: 564
fm tuner front end design-primer needed.
hi,im new to this forum so hello everyone.i would like to eventually design my own fm tuner front end (hifi). i am aware of the basic topology eg rf amplifier, local oscillator, mixer and first 10.7mhz if stage.i would like to use varactor diodes, d...
RF, Microwave, Antennas and Optics :: 13 Jan 2009 20:59 :: stcboy2002 :: Replies: 10 :: Views: 1488
computer controlled universal remote control
hello mate,i am doing my final year project, in which i need to construct a universal remote control fro tv. the controller will be controlled by the computer. the computer will send the appropriate signal through serial / parallel port to the ir tra...
Hobby Circuits and Small Projects Problems :: 29 Dec 2008 15:27 :: banjo :: Replies: 2 :: Views: 354
ir transmitter & receiver with relays at output
hi, i am looking for a design for an ir transmitter and receiver which controls relays at the output of the receiver. i am going to use this project for controlling on and off a lamp at the relay outputs for example. a 4 relay output will do very fin...
Hobby Circuits and Small Projects Problems :: 09 Nov 2008 8:35 :: Chupo_cro :: Replies: 15 :: Views: 6432
some electronics related ques...help plz...
> g(s) = 10/s(s+2) then the natural frequency of this transfer function isa) 3.146b) 4c) 5d) 2 > in tv video amplifier is used for =?> avalanche photo diode is used when compared to pin diode bcza) larger band width b) hig...
Electronic Elementary Questions :: 05 Nov 2008 12:32 :: umang :: Replies: 5 :: Views: 300
hdmi interface
can anyone help me further with information about hdmi interface. according to the standards and documents i find on the internet the circuits at the receiver end are connected to a 3.3v power supply. however, there is no 3.3v supply line running thr...
Analog Circuit Design :: 20 Oct 2008 13:13 :: QuizTed :: Replies: 4 :: Views: 333
tv transmitter networking
hi,we have many kinds of analog tv transmitter in many different placesand also software connecting from pc to transmitter ( via port rs232) using rs232 cable (local control) to view the parameters, supervise, control it.now, our project is going to ...
Network :: 18 Oct 2008 18:27 :: alsoleda :: Replies: 0 :: Views: 186
reqd :ir transmitter and receiver in c
hai all i would like to construct a ir remote control transmitter and receiver both using a microcontroller, either 8051 or pic preferabily in c. any protocol will do.standard or custom . please provide links or examples for the same.my objec...
Microcontrollers :: 08 Oct 2008 14:36 :: nevis :: Replies: 12 :: Views: 6246
fiber optic for cctv connection
hi there,i would like to know is there any connection on close circuit tv conected using fiber optic ,is it cost effective compared to conection using wires?do any one have info on ftth?thank youregards danesh...
RF, Microwave, Antennas and Optics :: 09 Sep 2008 9:18 :: iraqi2006 :: Replies: 3 :: Views: 720
wireless update scrolling led display
please helpim working on a scrolling led display using 5x7 dotmatrix. im inplementing on pic18f series and looking for a means of updating without wires. wireless or infrared using rs232 port. please i need help....
Microcontrollers :: 03 Sep 2008 14:09 :: polag :: Replies: 5 :: Views: 534
send data to ucontroller
hi,i hv been wrking with dot matrix.i want to send the string(to display) from pc to the ucontroller.hw can i send the string to the ucontroller ?serial communication?if so,hw to accomplish it?plz ,inform me in details.with regards.....
Microcontrollers :: 30 Aug 2008 5:09 :: saeed_pk :: Replies: 6 :: Views: 474
video tx
hello i have assembled a video transmitter circuit. its not working. the base voltage of q4 is zero. please see if the circuit is correct. i dont see how the base receives its voltage, because there is no connection from the positive supply...
RF, Microwave, Antennas and Optics :: 27 Jul 2008 15:38 :: vfone :: Replies: 1 :: Views: 174
ir transmitter
ossible design an ir transmitter using microcontroller rsc 4x (sensorys). and if you know some examples (firmware and schematic) that can be useful.an other question: i have to command sky (satellite tv), which protocol i have to use, it dipend on th...
Microcontrollers :: 10 Jul 2008 17:40 :: boseji :: Replies: 1 :: Views: 351
need rf ground breaker design, catv giving me 1.5v from coax
hi guys.. this is my first post here.sorry for my english. hope you can understand me.btw: im not a technician or anything.i live in argentina, where we still have analog catv. the other day i measured the voltage that my cable company sends through ...
RF, Microwave, Antennas and Optics :: 30 Jun 2008 1:21 :: RF-OM :: Replies: 18 :: Views: 474
pair of antenna at 90 degrees? (on same access point)
hi. i have seen an application working in the 2.4ghz spectrum where the access point had two antennas (i am not sure if it was actually two separate transceivers or just two antennas - i suspect the former) who were mounted at a 90 degree angle to on...
RF, Microwave, Antennas and Optics :: 29 Jun 2008 6:42 :: Azulykit :: Replies: 4 :: Views: 171
ADS
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satellite tv polarization question
hi.1-satellite tv usually use for ku-band linear polarization (horizontal/vertical), but what is the name of the phenom that allows to receive both h/v polarization at the same time using a specific rotation of the lnb? is it cross-polarization? 2-if...
RF, Microwave, Antennas and Optics :: 27 Jun 2008 15:34 :: Bhanumurthy :: Replies: 15 :: Views: 555
four 18000uf capacitors (350v) in parallel
anyone here good at x-ray machine ?i have just see a mobile type (high-frequency) and inside it is four big capacitor ?i been said that because using them will decrease the cable size (the ampere value that the cable size must endure is about 100a fo...
Electronic Elementary Questions :: 13 Jun 2008 19:57 :: hsingarajah :: Replies: 6 :: Views: 216
degraded and non-degraded mimo wireless channels
dear all, topic for discussion: what are degraded and non-degraded mimo broadcast channels?waiting for replies,cheers,mak...
Digital communication :: 23 Apr 2008 10:55 :: urwelcome :: Replies: 5 :: Views: 396
broadcast tv cable?
hii was wondering if there was any way to broadcast the analog output from the tv cable so i can receive it with an antenna on my tv.i have a tv in my room but there isnt any way to put the cable in my room so i was wondering if there was any simple ...
Electronic Elementary Questions :: 15 Apr 2008 16:43 :: Kral :: Replies: 5 :: Views: 192
measure analysis video signal
hello,i use video test pattern to analyze the quality of analog tv transmitter and using equipment vm101 at the output to receive the results, but i dont understand what the parametter (from vm101) is, im freshman, so could anyone help me and recom...
RF, Microwave, Antennas and Optics :: 29 Mar 2008 4:20 :: alsoleda :: Replies: 3 :: Views: 147
how to detect the presence of an object
can anybody help me how to detect the presence of an object with in a short distance only. what kind of sensors do you recommend? any circuit or links would help a lot....
Robotics and Automatics Forum :: 27 Mar 2008 10:00 :: randell_xtian :: Replies: 5 :: Views: 424
video/audio transmitter
hiwhat is the shape of output signal?...
RF, Microwave, Antennas and Optics :: 08 Mar 2008 1:03 :: mister_rf :: Replies: 1 :: Views: 90
i need help at fm transmitter
hi allcan i use valve in rf output instead of transistor at the range of fm whatthe real idea and the main schematic i can use regards...
RF, Microwave, Antennas and Optics :: 15 Feb 2008 17:52 :: mvs sarma :: Replies: 9 :: Views: 306
precoded ofdm....
dear alli need the thesis of, “spectrally precoded ofdm”. author – char-dir chungplease help me ………...
Digital communication :: 18 Jan 2008 12:37 :: vkekk :: Replies: 2 :: Views: 296
transmitter antenna
hi,.. i have a small question concerning an fm transmitter. ive made a transmitter with power approximatly 10mwatt, i live in an appartement in the 1st floor, when i place my antenna from the window, i got a range about 500meters without barriers...
RF, Microwave, Antennas and Optics :: 13 Jan 2008 4:16 :: duckling :: Replies: 26 :: Views: 1191
for sale apple macbook (ma700ll/a) mac notebook(at)600usd
company name - cupidlimitedregistered no.02918701address: 4 dial lane, ipswich, suffolk, ip1 1dlincorporation date: 13-04-1994contact#: 447045765571contact email: cupidlimited6@yahoo.com,contact email: cupidlimited@hotmail.comcupidlimited was establi...
General :: 13 Nov 2007 22:30 :: cupidlimited :: Replies: 0 :: Views: 435
for sales playstation 3 60gb(at)360usd and panasonic th-42phd8u
company name - cupidlimitedregistered no.02918701address: 4 dial lane, ipswich, suffolk, ip1 1dlincorporation date: 13-04-1994contact#: 447045765571contact email: cupidlimited6@yahoo.com,contact email: cupidlimited@hotmail.comcupidlimited was establi...
Business Special Interest Group :: 13 Nov 2007 22:23 :: cupidlimited :: Replies: 0 :: Views: 747
rf video transmitter
first, let me say that i know virtually nothing about electronics, radio frequencies etc. i am here because it looks like the best place to get some questions answered about a project. unlike typical projects i see on this board... im not building...
RF, Microwave, Antennas and Optics :: 03 Nov 2007 15:20 :: dibaa :: Replies: 17 :: Views: 1557
tv problem
actually i want to know how tv becomes on when we press on/off switch of remote control. what exactly happens, how the smps in tv become on/off ?...
Microcontrollers :: 08 Oct 2007 19:37 :: Medtronic :: Replies: 2 :: Views: 135
ir transmitter
i college know and i have the final project is use remote control.i want to know about remote control code for sony tv triniton wega kvtf21n61 series. the meaning about code is command and address code is use in program transmitter remote control.and...
Software Requests :: 23 Jun 2007 19:14 :: garfield :: Replies: 1 :: Views: 72
basic television circuitry
hi all, ive searched in the web regarding television. however there is no links or article that can help me understand how does the ciruitry of the television syatem work. any one have some dummies for televeion circuit or more informative li...
Electronic Elementary Questions :: 02 Jun 2007 11:51 :: echo47 :: Replies: 4 :: Views: 681
22" lcd monitor resolution in linux
i just dont understand why the 22 lcd are all widescreen? it is only good for watching movie in general.1. but anyway, i got one today, the max (default) resolution is 1680*1050. that is what i use in windows. but in linux (rhel 3 update 8 ), this re...
Linux Software :: 28 May 2007 7:18 :: lxyangroc2000 :: Replies: 10 :: Views: 930
video signal through power line. help please
i want to make a transiver unit through which i can transmitt the received video signal (from cable operator) through the power line. can any one guide me for the same? is it possible?my idea is like this. the output of cable i.e modulated video sign...
RF, Microwave, Antennas and Optics :: 25 May 2007 15:37 :: IanP :: Replies: 1 :: Views: 360
how a transister different from a vacuum tube
hai im very new to electronics plz help me how a transistor different from vacuum tube in construction and in functional:?::arrow:...
Electronic Elementary Questions :: 08 May 2007 14:31 :: ranganath_d :: Replies: 11 :: Views: 204
applications of semiconductor lasers
tructure and material) are commonly used for applications such as cd and dvd drives, optical fiber communication in the second window around 1.3µm, remote control transmitter and receiver in a common tv system.thank you...
Electronic Elementary Questions :: 15 Feb 2007 13:42 :: Trasponder :: Replies: 0 :: Views: 105
tv remote based multipurpose controller
hi anyone can help me with this project. i require to make a controller receiver which can be use for more than 1 electronic appliances. i have to know the ieee standard also for the frequency and also the work of transmitter and receiver. i hope u a...
RF, Microwave, Antennas and Optics :: 30 Jan 2007 14:51 :: hope_co :: Replies: 0 :: Views: 111
what is lmds?
hi guys,does anyone know about lmds ?i think it stands for local multi-point distriduted systemcan anyone explain about it?...
Digital communication :: 22 Jan 2007 16:37 :: dozy_walia :: Replies: 3 :: Views: 282
ir transmitter and reciever schematics
rying this out tommorow to find its range but im guessing 3 to 9 feet and by the way if you add a headphone jack to the transmitter (also available from radio shack) you can hook it up to a cd player,tv,computer,stereo etc...it should be fine for tha...
Professional Hardware and Electronics Design :: 15 Jan 2007 5:10 :: UncleBinary :: Replies: 0 :: Views: 204
wireless audio/video transmitter with i2c interface
und this great ic . it is a vhf audio/video modulator with rf output level of 82dbuv . and i think if i connect a input of a camera and then connect an antenna at this ics rf out pin and tune into my tv i would have a video transmitter. th......
Microcontrollers :: 07 Jan 2007 14:09 :: faizanbrohi :: Replies: 0 :: Views: 303
where to buy a uhf transmitter?
hi.i looked every where in the internet but i couldnt find a uhf transmitter.if it had a range of 500km it would be great....
RF, Microwave, Antennas and Optics :: 20 Nov 2006 22:21 :: farshid-ar :: Replies: 7 :: Views: 354
rf system design ku,x and c band
i wanna know if i can design an rf communication system at ku band 12 to 14ghz what will be the specification of my receiver transmitter.how can i make a link budget analysiswhat topologies i must use?are spectrum analyser,network anlayser and signa...
RF, Microwave, Antennas and Optics :: 15 Oct 2006 12:09 :: andrishev :: Replies: 7 :: Views: 1245
digital transmitter and reciver
in communication field i have no experience.so pls replay me,how to communicate between two microcontroller using rf signal[/img]...
Digital communication :: 15 Oct 2006 6:55 :: mbyka :: Replies: 9 :: Views: 930
final year project
hi everyone,i am looking for a project for my video systems class. here is a list of things i might do. i want it to be somewhat easy to find components and to develop. if there are any ideas or any sites from where i can get a theme to work on it wi...
RF, Microwave, Antennas and Optics :: 09 Oct 2006 17:08 :: georgewh :: Replies: 0 :: Views: 135
interference analysis
hi all,i have to design a workbench to evaluate possible interferences (co-channel, adj channel, ecc.) on a digital tv transmitter.of course, these interferences could be caused by other digital or analog transmitters, the band is uhf.i also have to ...
RF, Microwave, Antennas and Optics :: 29 Sep 2006 11:19 :: scoppulal :: Replies: 0 :: Views: 141
problem in fm ciruit
in fm transmitter circuit , i found aproblem in it as one of its componants is 2 coils each one 0.001µh but there is no ifi sold the 2 coils and connect the circuit but it didnt worki cant solve this problemif any body know about the matter plz tell...
Hobby Circuits and Small Projects Problems :: 14 Sep 2006 4:54 :: E-design :: Replies: 9 :: Views: 912
rf/ghz video link
i have one idea and i need your help people. what im planning to do is receive several tv signals at one (high) location with good reception, demodulate them to composite video level and then use rf link in ghz range to transmit it to another locatio...
RF, Microwave, Antennas and Optics :: 02 Sep 2006 10:21 :: sinip :: Replies: 6 :: Views: 453
help please. i need to build an infrared detector switch.
i am trying to build a momentary switch built with either photocells or ir detectors that will close a circuit when the ir beam is broken. do know if i can do this fairly cheaply?...
Electronic Elementary Questions :: 23 Aug 2006 15:34 :: trainman :: Replies: 5 :: Views: 354
what is ofdm?
what is it, and why is everyone so excited about it?...
Electronic Elementary Questions :: 15 Aug 2006 20:12 :: bauer :: Replies: 12 :: Views: 1704
give circuit of fm transmitter and receiver
hi, please give me circuit diagram of fm transmitter and receiver for the range of 1 km having good quality reception of sound.thanks,sangmeshwar...
Professional Hardware and Electronics Design :: 12 Aug 2006 8:09 :: smxx :: Replies: 4 :: Views: 636
50 ohm and 75 ohm characteristic impedance
why do 50 ohm get to be the standard rf transmission line impedance in the mobile communication systems, but 75 ohm is for catv?...
RF, Microwave, Antennas and Optics :: 21 Jul 2006 11:58 :: yuyu :: Replies: 3 :: Views: 285
vhf & uhf antenna [help]
hi friends;i need the specifications of vhf-uhf antennas, directional or omni-directional....
RF, Microwave, Antennas and Optics :: 20 Jun 2006 16:54 :: alexx :: Replies: 3 :: Views: 312
polarization
hi all!how can i correct (calibrate) a measurement done in vertical polarization whilethe transmitter used a horizontal polarization??in other words, i performed a measurement test with a vertical polarized antenna while the transmitter was in horizo...
RF, Microwave, Antennas and Optics :: 08 Jun 2006 11:11 :: scoppulal :: Replies: 2 :: Views: 174
wireless mic with mc145152
hi there,want to build a wireless microphone using mc12017(precaler) and mc145152-2(pll) to work in the 108mhz - 120mhz band and 75us of preenphasis if possible to connect to the back of mic, a shure sm58 or to install in a small box with no more tha...
Hobby Circuits and Small Projects Problems :: 06 Jun 2006 19:17 :: Code Warrior :: Replies: 6 :: Views: 2103
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