Asked by shreyas666 8 years ago | last reply 7 years ago
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.
Asked by Rajkumar2506 1 year ago | last reply 1 year ago
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.....
Asked by manpreet singh 9 years ago | last reply 9 years ago
PLZ help me to make a FM Transmitter in the range of 5 Km. with a easy way
Asked by fine 8 years ago | last reply 4 years ago
hi,i have a long range fm transmitter circuit.it has a rf out..how to add the av pin to the telescoping antenna?
Asked by mobitz 9 years ago | last reply 9 years ago
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
Asked by pennsteve 8 years ago | last reply 8 years ago
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
Asked by modtrend 3 years ago
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!
Posted by ericb1 7 years ago | last reply 7 years ago
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.
Asked by Rajkumar2506 1 year ago | last reply 1 year ago
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
Asked by Atul009 5 years ago | last reply 5 years ago
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."
Posted by ewilhelm 10 years ago | last reply 10 years ago
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?????
Posted by HavocRC 3 years ago | last reply 3 years ago
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.
Posted by youri 10 years ago | last reply 10 years ago
I know that I can transmit a FM station 50 feet without having any problem with laws (at lest what I have been told). But how can I transmit over all stations in that field?
Asked by nfarrow 9 years ago | last reply 9 years ago
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.
Posted by aaronx 10 years ago | last reply 7 years ago
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.
Asked by gday85208 6 years ago | last reply 6 years ago
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.
Asked by jumper1111 5 years ago | last reply 5 years ago
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.
Posted by thejrb 10 years ago | last reply 2 years ago
belkin tuncast universal fm transmitter - mine is different frm the ones shown unsure of solder point?
I cant really find the c 38 resistor the one im finding at the end of the red ant wire is the IR2j do i solder on the transmitter side? sorry cant get a pic on here yet
Asked by wildman29 9 years ago
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
I want to take an ordinary FM radio and make the scan function cycle through all of the frequencies very quickly and constantly. Any advice?
Asked by transistorguy 8 years ago | last reply 6 years ago
Hello I am looking to buy/build a small FM wireless transmitter with built in microphone (similar to karaoke but not exactly ) to transfer voice or sound from playing musical instrument to earphone. It is meant only for practice purpose so does not need high power, the distance between the microphone (the transmitter ) to earphone is like from mouth to ear a few centimeters say about 50 cm. I am electronic junior engineer and have knowledge and experience in electronics mechanics and wave buy. Before trying to develop a new product I was looking for a readymade shelf product. The first way I have searched the internet and reached manufacturer of Bluetooth solutions because of the plenty of Bluetooth earphone that are on the market, but quit a short time after I got some answers from the the Techs engineers of the manufacturers that Bluetooth will not be my solution because It was not originally designed for true real time transmitting. The main problem is the latency time because there is a delay between the voice or play start until I hear it in the earphone there is improved in Bluetooth 4.1 and 4.2 that is 38 MS and may be not enough while fast playing, So as I was advised I started looking in the RF FM area. FM transmitters are long time in the market of stages and performers, there are high power grate quality transmitters that cost hundreds of dollars. Here is the summary of what I need : I will need the smallest device (PCB) can be like FM spy bug transmitter. built in microphone (on the PCB ) , built in battery compartment (on the PCB ),built in antenna a copper loop on the PCB (no wire) Since there may be some problems like saturation of microphone or other problems with band width or sound and sensitivity, sensitivity and control for the Microphone is important. Easy calibration of tuning and stability , may be digital tuning is better. One option is to use the standard of radio FM 88-108 , but it possible that I can use FM VHF or UHF system that have both transmitter and receiver . If there are no ready made products thatn I can easy build a kit , or from schematic diagrams I will be thank full if you have any ideas. Nevat Ben Haim Recomp Computers
Posted by Nevat 1 year ago | last reply 1 year ago
Asked by Shadow94 9 years ago | last reply 7 years ago
The capacitor circled in red
Asked by cccp3 2 years ago | last reply 2 years ago
I need to track my dog, and i would like to do it with a radio tracking system, but since im a DIY guy i dont care to buy it, (only to examin it if necessary ;)) and i would like it to have a needle indicator, is that possible? have used the last motnh searching the net for at tips and inspiration for the tracking system. Sebastian
Asked by boiken 8 years ago | last reply 7 years ago
Though I purchased my FM radio in a Metro (where FM signals are quite strong), now I am living in an sub-urben are and so unable to recieve good signals. Is there a way out?
Asked by ariesamit01 7 years ago | last reply 7 years ago
How audio in FM station to convert in audio to frequency & how can it transmit in to transmitter?
Asked by jagadeesh.rk 6 years ago | last reply 6 years ago
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.
Posted by kurdiz 10 years ago | last reply 10 years ago
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
Posted by thermoelectric 10 years ago | last reply 10 years ago
I have a car (2003 Mitsubishi Galant) with the radio antenna embedded in the rear window. I want to add an antenna to my FM modulator to improve the signal quality. How can I determine the best antenna length and placement? I already have information on how to mod the device. It's a Soundfeeder SF100. And yes, this will become an Instructable eventually. :-)
Asked by yoyology 8 years ago | last reply 7 years ago
I want to build an ipod fm thing for my car and i can imagine this would be useful
Asked by quellek2 8 years ago | last reply 8 years ago
How can I improve the reception of my fm clock radio? I can't turn it around or I can't see the clock. My bed only fits one way, so let's say it's stuck where it is. It was fine in my old apartment, in the new one I only get static. Short of buying one of those round antennas, what could I DIY?
Asked by EaglesNest 9 years ago | last reply 3 years ago
I found on the www many schematics but not togheter. I want to be a good and a stereo transmitter and receiver. Can anyone help me with a schematics for the both? I need with easy to find and cheap components, because i dont have many money, thats why i want to make and not to buy.
Asked by danyelo 4 years ago | last reply 4 years ago
I just bought a small Fm transmitter kit that doesn't come with an aux input. Is there an easy way to replace the mic with an aux input or an aux wire? Thanks a lot!
Asked by DELETED_DELETED_DELETED_16nato 5 years ago | last reply 3 years ago
I just need to figure out how to power this thing! Notice the positive marks in both upper corners, the negative in both lower? The large circle is the microphone, which is fully wired. The smaller circle is the frequency modulation, which is all set as well. The underside only has holes where the gray squares are and is otherwise clean (exception being one spot where the two mounting prongs of the microphone pushed through.) Thanks
Posted by owhy 4 years ago | last reply 4 years ago
Think about it, the age is the Digital Dawn of the day, anologue Television is already being planned to me completely removed from the air waves in 2009 to make way for the "supposedly" DIGITAL SUPURIOUR HD crap. I don't watch that much TV to begin with so it doesn't bother me. But what about FM radio, is that ever going to die? Chances are probably not for a few years, seeing how the AM spectrum is still kicking around. How long can our traditional ways last? I'd be fairly sad to see FM leave the game. Really, we've had radio since the dawn of the technical age, from the 40's through the 80's (remember the days?). I just wanna see what anyone else has to say.
Posted by Punkguyta 10 years ago | last reply 10 years ago
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?
Asked by tylervitale 6 years ago
With some friends at high school we have started a radio club. We are currently just streaming over the internet. I'm interested to know how complicated it actually is to broadcast over the FM radio. I know its possibly to receive a low power broadcast much easier but I still don't know how expensive that would be and difficult to acquire. I'm sure its a bit out of reach but i do know other high schools broadcast.
Asked by zigzagchris 5 years ago | last reply 5 years ago