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fm transmitter

Most mosques in  durban , south africa transmit live trasmissions using fm transmitter. the previous transmitter was independent with its own pick up microphone. only needed to switch on transmitter and you could hear the talks on the fm receiver. most programs dont require use of amplifier . we updated and now the  new transmitter is connected to amplifier which is compulsory to switch on if you need to transmit . it is also a flat sound whereas the old trasmitter picked up a good echo sound. is there any device that the transmitter can be plugged into instead of the amplifier that has a pick up microphone.  thanks mahomed 

Question by modtrend  


FM Transmitter

My wife has a real small FM transmitter that snaps on to her iPod and streams her music in stereo to her car speakers.  I only have the iPod nano which only has a headphone jack, it doesn't have the standard iPod connector. I was looking to see if there's an easy instructable that can make a nice sounding FM stereo transmitter.  The only thing I could find was this one: http://makeprojects.com/Project/Micro-FM-Transmitter/721/1  and I'm not sure it's transmits in stereo.  Pretty sure the one my wife has doesn't use the coil method either. Anyway, is there something else that I can be pointed to as a starting point?  I was thinking of maybe sticking the whole thing into a small altoids box and I can use it in my car.  I didn't know if that project is the only real one out there. any help is greatly appreciated, thanks!

Topic by ericb1    |  last reply


FM Broadcasting Answered

What is the max power voltage for FM broadcasting without a license

Question by wenpherd    |  last reply


FM Transmitter

Does anyone know if there is a way to make a FM Transmitter instead of buying one? Any help will be greatly appreciated!

Topic by XEFrontier05    |  last reply


FM transister

How to build an fm transister on an breadboard. I am a class 7 student . and science exhibition is near pls help me

Topic by 2illickans    |  last reply


FM transmission in Canada

Anyone know what Canadian FM transmission laws are like? How powerful of a transmitter can one use? On what stations can one broadcast? Are there any other things that are important to keep in mind up there?

Topic by randofo    |  last reply


FM radio antennas

Are there any ideas out there for building an FM antenna booster that can be used with the usual whip antenna that comes built into most radios these days. Most of the radios are made in such a way that it is difficult to get at the internal wiring, so the booster would have to be an external unit.

Topic by youri    |  last reply


FM Transmitter ideas

Hey guys i recently bought a maccally fm cup at walmart. it was on clearance for $7.50 so i got 2 incase i ever needed some spare parts on the cheap. so now i have this extra FM transmitter, and i would like some ideas as to what i could do with it. The best i have come up with so far is putting the whole thing in something else (like a project box) because my cupholder is not the best location for my ipod.

Topic by aaronx    |  last reply


FM Publishing and Instructables

Instructables has been invited to join Federated Media Publishing. To make this work, I need your help. Check out this short survey and the full post here.

Topic by ewilhelm  


usb to fm transmitter

 Hi, I am a very big noob to wiring. For a present, I wanted to make my cheap old AAA powered fm transmitter into a usb powered one.  Thinking I was so smart, I cut up an old usb cord and soldered the red to positive and black to negative. It worked great until it started melting the transmitter.  So I now I realize that usb is much more powerful than 2 AAAs.  heh heh. I found this: www.instructables.com/community/USB-to-Travel-Clock-Circuit-Help-/ but it's a bit over my head.  I'm assuming I need to get a capacitor or voltage divider but I could use a little help breaking it down into noob speak.  Plus the transmitter is a little thing, 2 inches, is there a smaller way of checking the voltage? K, thanks bye!

Topic by audrywolters    |  last reply


how to build a fm transmitter?

Question by asehgal1    |  last reply


car stereo sw1 to fm?

 I have sony cdx-v6800 car stereo i am trying turn radio but it shows sw1 and channels until 7524 but i need fm 88-108 can anyone please help how to SW1 into FM.

Question by manmeetcheema    |  last reply


Basic outdoor fm antennae? Answered

I need to make a basic fm antennae for my reciever inside my mancave,  It's a steel shed converted and inside reception drives me crazy.  I do have basic poles and some wire types in my arsenal.  Someone PLEASE HELP.  I need my music to keep my sanity if you can relate.

Question by gday85208    |  last reply


Boosting Fm transmitter range

I bought a FM transmitter for an ipod. I would like to boost the range of the device. (I know it is illegal but would like to get more range than 2 feet.) I think I need to build an external antenna but need to know where to hook it up to the thing. The transmitter I have is a ge FM transmitter for ipod.If anyone has done anything like this or have any useful links it would be great. I don't know anything about circuit making so help would be great on that as well.

Topic by thejrb    |  last reply


Which is the FM transmitter antenna ? Answered

When I wanted to expand my FM transmitter broadcast range I found a White and Red and Black wires please specify me which is the antenna one .

Question by achraf52    |  last reply


FM Transmitter mod help

Does anybody have any idea how to modify a car FM transmitter for an mp3 player so that it will transmit in frequencies other than the low and high extremes built into it? Also would it somehow be possible to make it transmit to all FM frequencies at the same time? If someone could help me out with this I would really appreciate it.

Topic by kurdiz    |  last reply


Hooking up an FM antenna?

I recently got a new power amplifier/tuner from my dad's buddy. On the back, where you hook up the antennas, there are 4 terminals: 2 for FM and 2 For AM. One on the AM side is for the antenna, and the other is ground. This make sense to me, because an AM loop antenna has two wires which need to be hooked up. On the FM side though, it also has a terminal for ground... From what I understand, FM antennas are composed of a single "wire", like those coming out of radios or the ones on cars. What's the ground on the FM side for?

Question by tylervitale  


Fm transmiter coding help

I need a little help determining a code that is used to run a Fm transmitter program through a Fm module and the AVR Butterfly. Here is the original article of the transmitter but there is no code that went with it and I tried to look for the file online, but I was unable to find it. There is this code that's on AVR Freaks, however, I do not know if that is the code for the transmitter (and I do not know what the code is suppose to look like because I barely know programming). I have all the parts ready to build it, I just need to know the code to make it run. Any help would be appreciated.

Topic by KT Gadget    |  last reply


FM Wireless Microphone receiver

About a year ago I got one end of an wireless microphone system at a yard sale. As far as I can tell, it is the sending unit. The recieving unit is lost to posterity, which is why it was so cheap, and has since been collecting dust. It has an RCA line in, 1/4 inch microphone in, a squelch knob, an output knob, a two-foot antenna, and a power button. It says it operates at 49.83MHz FM. I don't have a receiver that will pick up that frequency, and I'd like to know what it would take to build one. Perhaps mod an existing FM radio?

Topic by Rishnai    |  last reply


Amplify FM transmitter range?

Http://www.lucidscience.com//projects/Basic%20Spy%20Transmitter/8.jpg  This all relates to the picture linked to above I was not sure if I could put an amplifier before the antenna to boost the signal going to the antenna extending the range anyone know for sure it seems to make sense 

Question by Algag    |  last reply


schematic for fm radio jammer?

Need to build low power small fm jammer any just a schematic would do i can get parts and put together.

Question by 5bob    |  last reply


The FM is not operational, but the AM works?

Subaru car radio/cd player

Question by GingHeskett    |  last reply


How to build an FM transmitter? Answered

I want to start my own temporary radio channel. Well me and my friends plan to do it, so first we need a FM transmitter, so i was wondering if anyone of you could help me out. I am good at implementing circuits on PCBs and making circuits in general, so i dont think making one should be such a big problem, but the problem is i dont know how to make one, so needed help with that. If there is already an instructable please link me to it because i've not been able to find one.  Thanks! :)

Question by ankur2893    |  last reply


Improving Signal of FM Transmitter

I recently bought the C. Crane FM transmitter. I have not had much luck with it even after turning up the pot as described on the internet. However, I am not giving up yet. Below are some possible things that I have thought of to improve the sound quality of the radio at a distance from the transmitter. 1. run wire from the antenna of the FM transmitter to the ductwork in my house. I already tried this. I had better luck attaching the wire to the exterior of the ductwork in my basement rather than the interior of the ductwork. 2. create some sort of repeater(s) to get around walls. This device would have to be a receiver/transmitter. 3. create my own FM transmitter with the best parts that I can find. 4. Use a homeplug system. Your suggestions are much appreciated. I don't know a darn thing about electronics so if you have any recommendations for good books that would be nice.

Topic by sundet    |  last reply


120v FM radio question

Does anyone have any clue on how to build a normal radio that I can plug into my 120v wall jack and not have to use a earplug to listen? I would greatly appreciate it because i have always wanted to design and build my own radio but after scouring the internet i haven't come upon ANY knowledge...not even a manual. Please, anyone?

Topic by commercial free    |  last reply


FM Transmitter with voice recorder.

This is what I would like to have made. I see these in spy websites for cheap. I don't want to spy on anyone but need for for another reason. Can anyone here on this site point me in the right direction. It's a short range FM Transmitter that has a built in voice recorder for up to 4 minutes made. The recorder would have a simple button that you would press to record with a built-in mic and small speaker for playback. The recording when transmitting would loop forever. The unit would be powered by a small battery and solar panel or just solar panel if that would work both indoors and out. The unit would only have to transmit during daytime hours. I would need the FM Transmitter to transmit no more than 100 feet and to meet FCC for USA. The transmission would need to be a very clear transmission because it is going to be used for advertising. It does not need to be in stereo. I've attached an image of what I would like to have made and the case is available at http://www.polycase.com/ Thanks Gregg

Question by greggsudduth    |  last reply



Is Arduino can do FM modulation? Answered

Is Arduino can do FM modulation without any additional peripherals.Simply an Higher AC frequency signal with antenna can propagate in air. My question is,can we do FM modulation in Arduino only by coding it,without using any additional peripherals.Generating the carrier frequency in Arduino by coding it and then by performing FM modulation by coding it,getting the external audio signal through Analog input pins and after all the modulation process, connecting a long wire on the digital pin of arduino because the square wave is going to be used as carrier signal.A simple wire can act as a Antenna.Is the above explained process is possible in Arduino only by programming it.

Question by Rajkumar2506    |  last reply



what is the inductance of a coil which is 3mm in diam having 5 turns? Answered

I'm testing FM transmitter using multisim software.I don't know the value of the inductor to be used in the oscillator ( the oscill. has a variable cap.).I got this ckt. from a site, it is mentioned that the coil should be about 3mm in diameter and 5 turns. The wire is tinned copper wire, 0.61 mm in diameter.Since I'm testing it using multisim so i need a specific value.anyone knows it PLZ... let me know........THANKS.....

Question by manpreet singh    |  last reply


How to eliminate noise in FM transmitter? Answered

I had made a FM transmitter using IC NE555. When i power the circuit with 9V battery,the transmitted audio is clearly received in my radio receiver.The problem is the battery will soon drain out and also as the battery starts to drain the transmitted frequency changes without my knowledge.So as the battery voltage decreases the frequency is also changing.To eliminate this problem i used transformer powered source with 9V Regulator 7809.When i power the circuit with transformer the received audio signal on my radio receiver has so much of noise added.The audio quality which i transmitted is completely lost.Anyone Help me to resolve this problem.

Question by Rajkumar2506    |  last reply


Cell Phone Noise in FM Transmitter

I have recently built a dock for my HTC touch for use in my car. The dock is basically a holder with a cheap FM transmitter in the back. The FM Transmitter and cell phone are connected in parallel to a 5 volt USB car charger. For some reason, the FM transmitter is picking up noise from the cell phone. It is digital noise, different frequencies and beeps that vary depending on what I am doing on the phone. The noise is very quiet, but still there. Is there any simple solution to filtering out this noise? Will a simple capacitor do? Thanks Andrew

Topic by computerwiz_222    |  last reply


FM Transmitted Music: iPod --> Receiver

I'm working on a total customization of my bicycle, and just had to have some speakers. My iPod's earphones are a bit finicky when it comes to moving around with them, and really constricts my hearing of cars, causing me to not be the safest rider. Now, I've tried hooking larger speakers up to my iPod (a few topics on that), but the iPod simply couldn't power them, causing me to need an amp, etc., etc. I'm hoping I've found what I need with this subject. Could I build an FM radio transmitter, to be hooked up to my iPod, and receive my music with a sports radio I have? Would my music be louder, since my radio plays loud? I'm sure I could build the circuit, but it is the technicalities I'm worried about. Thanks!

Topic by Bran    |  last reply


'Car FM transmitter to spy bug'

Hello, i am looking for some tips on how to transform an FM mp3 transmitter to a spy bug.. i have that transmitter you plug into the lighter in your car, put an aux cable or an usb in it, and it then trasmits to a set frequency so you can tune in with your radio.. i was wondering would it be possible to just get rid of the jack, and solder a microphone instead? If not, how would I go around that?

Topic by dsirotic    |  last reply


how to trensfer a fm scan radio to static?

I have a HO700 SENTRY and i would like to make it to play 1 channel only. can somebody help me?

Question by cobito1060  



How can I hook up this capacitor for an FM transmitter? Answered

In the attached photos, I have the schematic for an FM transmitter.  I pulled a trimmer out of a shower FM/AM radio.  It has six leads.  In the photo you can only see five of the leads.  The sixth one is on the other side and is shorter.  I'm pretty sure that one was for the AM.  Can anyone tell me how I would connect this?  The one in the schematic has only 2 leads to connect. Thanks

Question by pennsteve    |  last reply


Help me selecting antenna for my fm transmitter????

I am building fm transmitter i am finished with every thing in circuit leaving antenna i searched for d.i.y. antennas but there were many confusing names of antennas i dont want to go through all those defination, uses ,advantages etc. of those antennas so please help me choose. I am adding a image of my circuit please help me choose from dipole, 1/4 wave ground etc. antennas. It will be nice if u tell me any d.i.y. to make your suggested antenna. Remember i want my transmitter to work from 88-108 Mhz

Question by Atul009    |  last reply


how i can make a circuit of FM transmitter in range of 5 Km.?

PLZ help me to make a FM Transmitter in the range of 5 Km. with a easy way

Question by fine    |  last reply



Education in 2008

This is a video I did as part of an advertising campaign for Education in '08, which is running on Instructables in the few weeks left before the election. You might have seen the video and ad running here, but if not, here it is. They simply asked me to "talk about education."

Topic by ewilhelm    |  last reply


how come my am / fm tube radio works on am side but not fm side? Answered

I have an Arvin 480 tfm am/fm tube radio from 1950 that the am side works perfectly with the built in am antenna and has no hum. but when i switch it to fm mode it has a faint hum coming from the speaker and doesnt change with volume, no static, music or anything, just a hum and it just stays the same. all the tubes light up and i even switched around the ones with the same rating in the radio but it still does the same hum. i connected a wire to the fm antenna screw to make sure it wasnt just not recieving anything but it didnt change. im just confused why the radio works perfectly on the am side and the fm side has nothing but a faint hum. any ideas?

Question by florlayamp    |  last reply


Why cant I make FM transmitters?

So I am very angry at this point. I've made over a dozen FM transmitters and they NEVER work.  The list includes http://makezine.com/projects/super-simple-fm-transmitter/, http://www.buildcircuit.com/simple-steps-for-making-fm-transmitter/, https://www.instructables.com/id/The-Ultimate-FM-Transmitter/. These are just a few. I use all the right parts and I make all the right coils just like they say. What is wrong with me or my circuits?????

Topic by HavocRC    |  last reply


How to make a fm transmitter without amplifier? Answered

I want to build a fm transmitter with 400m range. I already have a custom made amplifier all I need to know is how to transmitt the signals.  I don't need a mic I will play it through mp3 player. plaese help me and give me a circuit. sorry for my bad english.

Question by jumper1111    |  last reply


Hearing a dialup connection on a FM car radio?

My mum was driving to uni and we hear a dial-up connection over the radio twice or three times, on 103.50 FM to be exact. A little while ago i rang my mum and she was in the same place and suddenly the phone goes silent and it starts making all different tones. What's happening? What's causing it? Why's it on the FM band

Topic by thermoelectric    |  last reply


WHAT TO DO WITH AN OLD AM-FM RADIO ?

I have a poclet am fm radio that i tried for kipkays transistor radio hack but i noticed mine doesent have a transistor but i play with the coils anyway......... i tried it it still works but some stations cant be picked up....im thinking of turning it into something else thats easy and to the point...any suggestions?

Question by mastermakoko    |  last reply



how the FM station to convert audio into frequency?

How audio in FM station to convert in audio to frequency & how can it transmit in to transmitter? 

Question by jagadeesh.rk    |  last reply


Do you think this FM Transmitter will work?

Heya, I've seen many ideas on how to build FM Transmitters on the web and successfully copied a couple of them. They are generally 2 or 3 transistor circuits which aren't very powerful when used with a small aerial. I've just designed a circuit with 4 transistors (2 of them being a darlington pair). So it's pretty similar to the two I've made just hopefully more powerful! The transistors i intend to use are BC548(b)'s because they're cheap and usable for high frequencies. Due to my really bad paint skills I'll annotate a few things on the schematic. On the left i just meant to show that the mp3 player plugs straight into the 3.5mm jack connected to the 330nf cap (all of the caps in the circuit are ceramic) and on the far right the triangle is the aerial which is connected to the 33nf cap. Thanks very much for reading this. I know that the aerial will be a BIG limiting factor to the range of it, but i wanted to design a more powerful circuit before i bought a new aerial anyway! So please can you leave any feedback. Best regards Sorry, but it's impossible to see the values of the components unless it's viewed in the original size, the only way i can see how to do that is by clicking on the little "i" in the top left of the picture.

Question by craig c    |  last reply


MY CAR FM MODULATOR ONLY PLAYS 2 SONGS?

Connection and tuning in is no problem, but when I connect flash drive or card both have many songs on, all in mp3 format it still only plays 2 songs. It hasn't always done this, it worked perfectly well at first. Thanx if you can help. roy

Question    |  last reply