I would like to know how to create a simple basic fm/am radio transimtter..
Posted by Joshua_ag 5 years ago
I am looking to have a Micro transmitter for an invisible fence made. This will need to trigger the invisible fence shock collar when it gets within 2 feet. I have a dog with a shock collar that attacks a smaller, older dog in the house. I want a transmitter that will fit on the collar of the smaller dog, run off of batteries with a LED to show it is powered on. I have an extra receiver to test with, and i can send photos of the transmitter and what information i have. Willing to pay COD for delivery.
Posted by GGryphon 9 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
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
I am in confusion. Actually i have a wireless bell but of shorter range. So i thought to extend its range. I want to add one more pair of receiver and transmitter in the way. So when bell button is pushed, transmitter will send to receiver and receiver will complete circuit of transmitter and another signal to other receiver of bell. So it will double the distance. If it is possible kindly help me out. I am new in this field so explain me and tell which parts i need to buy. Thank you.
Posted by RollingS2 10 months 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
I wish to make an extremely small (size and part count) AM transmitter using only a few transistors and passive components. I wish to transmit an audible tone on a set frequency.I am thinking along the lines of a transistor flip-flop circuit oscillator, perhaps routed through another. It really needs to have less that five/six small components. DIP components are too big. Small electrolytic and other capacitors, transistors, and resistors are acceptable. Transmission distance needs to be at least 1/4 of a meter, but further is better. It needs to run on between 1.5 and 6 volts, low to middle'in milli-ampage im thinking watch batteries for a few hours at least. I have read the following article but as stated before it needs to be very small. https://www.instructables.com/id/Make-a-simple-AM-transmitter/Can anyone help me out with a schematic, thoughts or advice?Thanks in advance,-AndyP.s. I can work out transistor loop timings and I understand how the Amplitude Modulation system works. Current thoughts/plans (if you can call them that) are an audible tone switching a secondary transistor loop from high (no resistor in series) to low (resistor in series) power and back. The secondry loop will be switching at the target frequency.
Posted by andy 10 years ago
Hi, i want to make a device, please tell me how... there is something that looks like a tv remote . it has 9 buttons on it. And there are 9 light bulbs. when i press each button, each of the 9 light bulbs should light up. for example, when i press button 1, light bulb 1 should light up. when i press button 2 , bulb 2 should light up, button 3 turns on bulb 3, and so on. this needs to be wireless. i have done some research and i have found that i need something called an RF transmitter and RF receiver. I just need some hints on how to make this device. i hope it is clear what i want , english is not my first language, if its not clear let me know and i will clarify.
Posted by create90212 10 years ago
Hi ! I'm working on a Tech Project and I need a wireless video transmitter. A webcam or any video camera provides a video stream, my computer receives it. I've searched on the Internet but I've only found shopping solutions. There are different way of transmitting which seem to be efficient : - IP - Wifi I want to make it by myself => build the transmitter and the receiver, connect the transmitter to the video camera, connect the receiver to the computer to collect the video stream. This is a project for my engineering school. Is it possible and affordable for 100€ ? What do I need ? Thanks
Posted by CedricA2 2 years ago
Hey everyone! i'm seeking some advice about a system i've been trying to work out - a bluetooth audio headset from a PA system for vocal monitoring during band rehearsals. currently i'm running microphone -> PA -> bluetooth 4.0 AD2P compatible audio transmitter -> powerbeats bluetooth 4.2 headphones the connection is working fine, the only issue is latency between microphone and headphones (approximately half a second), which makes it very difficult to use as a monitor as i require very minimal latency to hear my voice in synchronisation with the rest of the band. a few questions; does bluetooth simply have an unavoidable lag due to data compression? is it possible for me to hack the bluetooth transmitter in some way to increase the rate of compression/transmission? what would you recommend as a cheap substitute in the event that nothing can be done? thanks very in much in advance, Austin
Posted by totemgoat 2 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
Hey everyone does anyone know any good ideas for making a portable ham radio transmitter and receiver that can fit inside an iPhone case (the cardboard case you buy them in)? It would be good if it was a kit, but it would be better if it can be made using a breadboard and other bits and pieces. Anyone have any ideas?
Posted by simonyu 5 years ago
Does anybody know if I can get wireless headphones with multiple headphones receiving a signal at the same time from one transmitter? I DID google it, but I only got one useful source, and I figured you... smart... people (cough) would give me some clearer and more focused info
Posted by Ananand 9 years ago
I have a few questions regarding the data rate of normal RC transmitters. Roughly how often does the processor in the transmitter scan the inputs? Each individual channel only operates at around 50/60 Hz, can this easily be increased? I've heard that there are digital servos operating on a frequency significantly higher than 60Hz, do they still operate on the same 60 Hz input? How noticeable would a refresh rate of 5Hz be in the position of the servo when it is in use on a performance model (i'm told that a program the executes in 1/10th of a second appears instantaneous)? Can a 100% duty cycle pulse be supplied to a servo to make it move faster, if the correct position signal is supplied when it reaches the right place? Thanks for any replies. (does anyone know where to find the pinout for the nvidia gt330m graphics card)
Posted by The Skinnerz 7 years ago
Newbie here... greetings! I work in office building with about 20 guys, most heavy coffee drinkers... we have one-holer restroom which is located about 100 feet and around a corner from the area where the majority of the guys work. Needless to say 8 out of 10 times you make the journey to go to use the restroom, someone is in there with the door locked... leaving you constantly defeated and having to go badly.. I want to create a light or a signal viewable in our common room that would indicate when that bathroom is in use. There is one light switch in the bathroom which operates the overhead light and the fan... and the fan is extremely loud so we always turn the light off when exiting the bathroom. So my thought is to add some sort of transmitter to the switch that when turned on would send a signal to a receiver down the hall in the common room and that receiver would turn on a small light somewhere in the room. The guy next to me has a nice lava lamp and has volunteered it's services as the bathroom indicator. I'm hoping to find a transmitter or replacement switch/transmitter combo that can be wired into the existing single switch box (no batteries to change). This is what I need help locating. It would need to perform it's current duties.. turning on the light and fan, as well as send the "on" signal and "off" signal to the receiver 100 feet away. I think the other solution would be to run a wire thru the ceiling from the switch, but was hoping to avoid that. Thanks in advance for your help!
Posted by treetop1500 5 years ago
Could anyone suggest how to build an electronic system for using a radio signal to turn on and off another circuit. what i mean is a transmitter with a button you could hold and press a switch and a reciever in the circuit you want to switch on and off which prevents power reaching the circuit unless you are transmitting. i would want to be able to transmit over atleast 20 metres and through thin walls, aluminium foil and clothing. thanks.
Posted by resistanceisfutileiflessthan1ohm 5 years ago
I'm Sure someone has had this idea before but I just want to know if people think this would be cool. I was thinking about make a breadboard with a crystal radio transmitter with a head phone jack sticking out of it, that would fit in some sort of case, and have it stick into my iPod Nano 3rd Generation. My iPod is red so I would paint the case red to match, Please post idea and links to the parts please.
Posted by Nameless37 10 years ago
Dear enthusiasts, please help me out. What would be the best IR receiver to use for detecting signal from 980nm IR laser 0-15KHz. I'm going for distance here. 200 meters is more or less the goal. The further the better. Ambient light might also be an issue as this is to be done outside in possibly sunny conditions. If anybody has any ideas or suggestions please, throw them out here. Thanks.
Posted by GusevAnton 8 months ago
How many of you are willing to climb to a transmitter tower? Are you brave enough? Watch the video and share your thoughts.
Posted by blkhawk 5 years ago
Hey All, I am currently working on a LiPo Battery Adjustable Voltage Battery Pack, that has a headphone amp and bluetooth transmitter built in. I want the user to be able to use any compatible BT Headphones or BT Receiver Dongle. It is for use with metal detectors. Every time I Google Bluetooth Transmitter Module, I find a bunch. Upon closer inspection, I find they are all receivers (i.e. speaker left out, speaker right out). There are bluetooth dongles that plug into a 3.5mm jack and transmit, but there is a lag in the transmission that I believe stems from the module not being hardwired into the system. A lag in receiving the BEEP means the object is harder to pinpoint, more digging, bigger holes, and frustrated folks. Can anyone recommend a good available BT Transmitter Module that I can hardwire into my system as a test to see if the lag goes away? Any assistance y'all could give would be greatly appreciated! Mike
Posted by gollumses 3 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 9 years ago
I am trying to figure out how to control a device that will be "off" while in the range of a transmitter (short range...under 10ft) and then turn on when it goes beyond the range of the signal. I would also like it to be an adjustable range. I was thinking the device would be "on" constantly as the transmitter tells it not to activate, but once it leaves the signal range it would activate. Any thoughts? Thank you in advance.
Posted by milkyway312 4 years ago
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.
Posted by KT Gadget 8 years ago
I have these controls http://www3.towerhobbies.com/cgi-bin/wti0001p?&I;=LXLDP9**&P;=MLOn the receiver end each channel has 2 negatives and one positive so you can switch polarity. My transmitter is not doing anything on any channel and I get constant current flow in one direction even when the transmitters off. I donâ€™t know much about these types of controls and I looked through the manual and canâ€™t find anything to help. Is there something wrong with the controls or is something else going on? Can anyone help?
Posted by kendallickes 9 years ago
Hi all, I just bought the Smartlab: You Build It - Rock Star Microphone toy from a Goodwill. It's a great toy; it has a microphone that let's me transmit my voice over the radio (perfect for a Halloween haunted house when the static-mad radio bursts to life with terrifying voice-overs!!!:) works but only up to about a six foot range. I would like to be in a different room and use the microphone but I need to boost the range considerably - I understand that the FCC has rules about this. Moving forward, I don't know how to do this (at all....). Are there commercial range boosters that I can use? Are there mods that someone can recommend? Are these toys designed to NOT transmit beyond six feet even with mods? I wish I could give more information about the tech specs of the toy but I will have to try to de-solder the metal plate covering the circuit board (plus I don't know what specs to look for yet). Advice appreciated, DAZU
Posted by damianzuch 6 years ago
This is my first time on the site and first time with trying to build a rc anything. My mind is so scrambled due to constant searching online and I still don't know where to start. First, I thought of building a brushless motor. Seeing some online looks awesome. Just some wire, rod and a magnet to a battery. But I do not know the size of battery nor how the size of the wire will change my project. Second, it would be fun to have my PS2 controller, control the heli or plane I choose to build. Is this possible. Third, can I use a motor from a cheap heli in a plane and have control over the speed? Lastly for now, is there a way to figure what motor I need if I was going to build a slow flyer vs a outdoor micro flyer? I have been looking at weight mostly and don't know if I need to be that concerned. Please help if you dare to take me on as a challenge case.
Posted by Todd M 4 years ago
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
Posted by computerwiz_222 9 years ago
I found this today down at the beach, an old broken fm transmitter, and it looks like it had been down there a while. However the transmitter unit itself for some reason is detachable, and it says 5v on the back. Does anyone think it would be possible to wire this up to maybe usb 5v and somehow wire an antenna up to it? That would be so sweet if I could use an old P1 to broadcast a radio station :D
Posted by Punkguyta 9 years ago
Is it possible to send multiple sensor readings via through a 433Mhz RF Transmitter + Receiver Module Link?..Meaning, assume that I have a three Flex sensors on the transmitter side and three servos on the receiver side. I have the project almost complete however I would like to make it wireless with these rf modules. When you bend a flex sensor its corresponding servo motor will turn depending on how far the sensor is bent. I do not know if this is possible using these modules since there are multiple flex sensors and they are analog (I'm not sure if analog is the correct term but what I mean is since the sensors will output an array of values I don't know if it will work since its not digital) If anyone knows if this is possible please let me know and also if you can I would need help with the code, I have never made anything wireless before but it seams really neat. Thanks to all those who reply!
Posted by Daniel Quintana 2 years ago
Hello, Basically i am making a robot for a competition called "robowars". I want to control the robot with the transmitter i.e. the flysky transmitter, like if i want a rotating disc to cut someone, or a hammer, etc i will have to control it with the transmitter right and i want to use the arduino for this, for example, to change the speed of the disc or change the speed of thee robot itself.I want to read the stick values and assign them for different tasks. My robot is about 15 kg, so i need a high power battery to run it, . I guess i can use a BEC for this....i just need help in reading the stick values from the transmitter.Please help in the hardware and software. I am using an ARDUINO MEGA 2560. I am totally new to robotics and have no experience so[b] please [/b]help. I need the code and the connections. Thanks in advance
Posted by vkarpuram 6 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
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.
Posted by sundet 11 years ago
OK i have been thinking about doing this for a while now and i finally did. Its an ipod chaarger and an FM transmitter fitted in a n altoids tin. The top view is the button for the fm transmitter and its green indicator LED beside it THe red button is the button for the ipod charger and its red LED beside it. THe inside pic might look like a tangled mess but i made my wire to long and i had to like jam them in to make them fit The 9V is for the ipod chager and the AAA is for the fm transmitter. Please leave some feedback i want to know how i did. Thanks
Posted by fretmelter 11 years ago
Hello I have a question about an idea I have for an antenna that always points to the sky antenna no matter how it lands; this is for a high altitude balloon. My idea was to make an antenna the shape of a tetrahedron, so that one antenna always points up. Does having 4 antennas diminish the signal from the transmitter at all? Thank you
Posted by sdtacoma 7 years ago
Just read there is a 10W transmitter IC that has been developed to power a receiver IC collecting 6W of that energy... Both are ASIC chips that can operate and power power mobile devices up to 30 feet apart. Even though the RF energy is deemed safe. I would plan on using a Faraday helmet and maybe lead under wear when next I visit a coffey house.
Posted by iceng 2 years ago
I would like to build my own rc airplane. I already know how to build the fuselage and the wings. I also have the landing gear. I have a 27mhz rc circuit from an old rc car. The problem is the car was only a 2ch board. I need a 3ch transmitter and receiver. (Throttle, left/right, up/down). I'll be honest, I don't know much about circuit boards, but I can learn. Does anyone know how to make the circuit board for this, or where I can get a custom board made for me?
Posted by popit 8 years ago
Hey everyone, I am a student in software engineering and I am leading a project with other folks in software and electric engineering as some artists which consist of developing a computer game that use a home brewed device. That device is essentially a wii-mote ripoff: we will use some gyroscopes and accelerometer to get user input. However, some of the parts we are looking for are very expensive, we need to do 3 of theses devices and we don't have a big budget :) Since the most expensive part is the bluetooth transmitter (our device needs to be wireless), I was looking for a workaround. First, why bluetooth? Well we thought using some FM or RF stuff, however that implies some rare stuff that is not embedded in our student computers and even more expensive... So that's why we thought using bluetooth... And my question is... Is that possible and not so complicated to use those cheap USB bluetooth bundle such as these ones: http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords;=bluetooth+adapter ? When I say not so complicated, I mean that we won't have a big controller... we will have just what we need to get the data from analogical sensors turn it into digital data and send it over USB. Looking over the web I found that some RS232 to bluetooth bundles exists, however they are very expensive... It might be an utopia, electrical stuff is really not my field of study. Thanks for your help!
Posted by scadieux 8 years ago
Where can i get a transmitter for a wireless transmitter like this : http://www.zenreich.com/ZenWeb/motorcycle/riderlight.htmand how do i build something like that ?i need one for my brothers small battery powered scooter. i have most of it ready except for the transmitter, and i don't know what to do to make the LED's have a receiver.help !
Posted by mrcs 9 years ago
I need to know how to connect a gnss receiver to one specific transmitter to pinpoint its exact location. If the gnss receiver wont pinpoint the transmitter location I am wondering if theirs another chip that a gnss receiver could use to replace the transmitter. (If you have any chip suggestion please make sure their small). I prefer you email me @ email@example.com.
Posted by ahmad2013 5 years ago
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!
Posted by audrywolters 8 years ago
Hey guys, I have a question regarding sending data over lasers. Is it possible to link two computers with a laser beam (for text transmission, kinda like skype)? And if so do any of you know how I could make this system that would allow two computers to communicate over a laser? Thanks, CKGarside
Posted by ckgarside 6 years ago
How would you use an array of ultrasonic sensors to determine the 3d position of an ultrasonic transmitter. Basically i want an ultrasound transmitter on my hand that gets picked up on an array of 5 or so receivers that outputs the position via usb.
Posted by redshirtdeath 7 years ago
I'm working on a project where I need to have a transmitter and a receiver with an alarm, so when they are apart a certain distance the alarm goes off. I need the alarm to be attached with the transmitter not the receiver, where it will be attached to a valuable stuff for example.
Posted by AmmarK22 6 months ago
I am a hobbist/inventor/sculptor/geek. I am looking for plans or a kit to build a fiber optic booster transmitter and reciever. Or even a unit that can send and recieve data and video signals. The signal must be able to travel a minimum of 300 ft. I am trying to build a submersible rov that I can afford. The other option that I might have is a rf to fiber optic converter. Would anyone be able to help me out?
Posted by batguanno 11 years ago
I was working on a little project that turns my Raspberry Pi 2 into a FM transmitter. The goal is to make it completely headless, having it start up immediately on boot, without any external computers or peripherals. Now, I have tried this following command: mpg321 --random /home/pi/music/ - | sudo /home/pi/PiFmRds/src/pi_fm_rds -freq 95.5 -audio - The first command tells it to randomize and play the music. Then the directory it is in. Then there is the pipe, followed by the command to start PiFmRds, on the frequency of 95.5 FM. And finally, to take in audio from a pipe. But I get this: High Performance MPEG 1.0/2.0/2.5 Audio Player for Layer 1, 2, and 3. Version 0.3.2-1 (2012/03/25). Written and copyrights by Joe Drew, now maintained by Nanakos Chrysostomos and others. Uses code from various people. See 'README' for more! THIS SOFTWARE COMES WITH ABSOLUTELY NO WARRANTY! USE AT YOUR OWN RISK! Playing MPEG stream from - ... Using mbox device /dev/vcio. Allocating physical memory: size = 3403776 mem_ref = 5 bus_addr = fd812000 virt_addr = 0x768c8000 ppm corr is 0.0000, divider is 1096.4912 (1096 + 2012*2^-12) [nominal 1096.4912]. It's not showing any errors, but it doesn't tell me a whole lot. Additionally, the radio I have tuned to the frequency that I set does not play anything, though it is silent, suggesting that it is transmitting. Is there some obvious error to what I am doing, or do I need to take a different approach? Or perhaps I just need to look into the documentation of mpg321 some more?
Posted by Dashing Rainbow Dash 1 year ago
I need this project details : Assume that your photo diode is connected with Micro-controller (any) and micro-controller o/p is displayed in 16*2 LCD. Write a program in Arduino IDE for measuring light response of photo-diode into voltage, absorbance and transmittance. Display these parameters in LCD.
Posted by AyushJ39 8 months ago