Radio stuff

Could you replace the crystal from a vex transmitter to run off a different receiver.

Topic by IX Smith XI   |  last reply

salvage a radio?

I found an old portable sterio but the cd player and tape deck did not work but the radio did so i took the pc board out that has the radio guts on but now im lost  the wires coming out of it say s/m rch lch gnd +B Has anyone got a clue what thease mean  im guessing  rch and lch is right and left chanal for the speakers but the s/m and +b is throughing me

Question by nonamesleft   |  last reply

Internet Radio

So, I started playing around with nowlive, it's a website that lets you host a free internet radio station. Pretty neat. Anyways, I just finished up my first official broadcast..and wanted to let any of you who like the idea of being a dj know.My station's site:

Topic by Weissensteinburg   |  last reply

Radio Broadcast?

I want to make somthing capeable of broadcasting to 15 foot. (Medium Wave) Can anyone help?

Question by David97   |  last reply

Amateur Radio?

 I am going to be taking an amateur radio course early 2010 (Foundation level). I am interested in summits on the air -  I want to build a small aerial that could be packed away into a small section of PVC pipe. I have found the 2m 1/4 wave ground plane - this design keeps coming up.  Any help, suggestions, ideas etc gladly accepted. Also anything else you want to tell a budding radio HAM; hints, tips etc.

Question by DELETED_zoltzerino   |  last reply

Modding a radio?

Hey im trying to modify my cars radio to have an aux input using the CD players audio hookup to the main  IC.  i cant find any datasheets on any of these ic's if i had them i would be just fine.  are the black wires that come from the CD player the audio signal wires? if they are could i easily just splice into that circuit?

Question by the_burrito_master   |  last reply

Amateur Radio?

 I am going to be taking an amateur radio course early next year (foundation level). I have been doing a little research into the subject and I am baffled by the terminology / acronyms.  I'm sure I'll learn all that when the time comes.  At the moment I am interested in cheap kits / second-hand gear and instructions on how to make a small, portable aerial for 2m (144MHz) operation for Any other information is gladly accepted. What is CQ, SSB, CW, QSL? etc.

Question by DELETED_zoltzerino   |  last reply

Radio Mod?

I would like to mod a handheld radio (or even a analogue tv but radio would be better) to get to listen to higher frequencies than normally available. I'd Like to hit the 1420Mhz mark approximately but with little electrical engineering or architecture experience, I'm not certain how? Which might make a TV easier to get there as UHF covers that right? (still safer to play with a battery powered radio than a 240V powered one) I figured there is someone out there with the ability to figure out what components need changing? The variable resistor that tunes it perhaps? If you'd rather post an instructable I'll follow that or just tell me what needs replacing with what? Any Ideas?? Thanks

Question by Mr E Man   |  last reply

Radio control. Answered

I have radio control radio and receivers from different cars with different AM. They are all 49 mhz, can I change AM by replacing old resisters at  the right spot and put less resistive ones to make it work? Any way?

Question by jbaker22   |  last reply

radio help

I have a philco radio from 19 42. its model: number is 42-1008. i need schematics for it and i cant find any. the only place i found them was here . and i have to be a member to view them which i am

Topic by Sun Gear   |  last reply

Amateur Radio (AKA "Ham Radio")

I have scoured the internet in search of directions, how to guides, or schematics for an amateur radio (ham radio). However, I can't find anything of the sort. All I can find is pages of "hams" showing off their equipment or pages linking to the same thing. Does anybody have a good simple schematic for a ham radio receiver or transmitter. If not, does anybody know where I can find one?

Topic by gimmelotsarobots   |  last reply


I love baseball.  I want to watch the World Series on TV, but I don't want to listen to the TV announcers.  I want to listen to the radio broadcast instead.*  Problem is, the "live" TV arrives 1-2 seconds after the radio.  Which means I hear about the deep flyball to left before I see it. And that takes the fun out of watching the game. So, I'm wondering if I can add an adjustable delay to the sound from my radio, to sync up with the picture.  I can sacrifice a boom box or other radio for this if nec. Or some other solution? (I can record both and sync 'em up later using video editing software, but that's not practical). * for baseball fans:  it's the choice between the Buck/McCarver team (perfectly boring & perfectly obnoxious) and Jon Miller/Joe Morgan radio team (passionate and fun).

Question by willz   |  last reply

Making a small radio??

Hey guys, I work for a radio station that has the idea of recycling old personal walkmen and connecting them to old hi fi speakers and containing them in a small box and strategically placing them around the city center, at bus stops etc. I was wondering if anyone would know how to do this, especially at a low cost (preferably with old parts) and without needing an amp? is this possible? Thanks, Tony :)

Topic by tonycraig   |  last reply

Radio Frequency Generator? Answered

Hi I am doing a project and it requires a radio (or anything longer than human eyesight) frequency generator. Is there any easy way i can do this, with parts from home or radioshack?

Question by LiquidLightning   |  last reply

Is there a remote for a stock radio?

I have a 2012 Kia Soul, base model, with the factory installed radio.  I also have two children who always 'need' the radio station changed.  Does any one know if you can purchase, if so where, a remote the radio?  I am a single mother so don't want to get involved with replacing the radio just to have a remote.  I was just hoping that there would be an easy out for me, lol.  Thank you

Question by kloenikole36 

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

Radio control question Answered

Would putting a 27 mhz frequency crystal  instead of the one shown, and a ajusting it to the right amplitude make a RC work  with this curcuit

Question by jbaker22   |  last reply

Bose Radio/cdplayer

When I turn on my HP laptop computer in the next room, which is on our house wireless network -- my clear playing Bose -- playing NPR begins to include "static" what can I do about it?

Topic by fcduda   |  last reply

Xbee radio control?

I've been thinking about making a FPV RC (first person view) plane and I was wondering about using Xbee and Ardunio. I was thinking have an Arduino on the ground and another one in the plane each one with an Xbee. I want to have joysticks, buttons and switches on the ground to control at least 4 servos, one or two ESC's and possibly other things (like LED's and retractable landing gear) in the plane and also have a camera and some sensors (altitude, battery level, ECT) in the plane sending video and data back to earth where it can be displayed. I am quite new to electronics and I just want to know if what I said is possible, if there is an easier/cheaper way, how one might go about doing it and if that's even how you use an Xbee. Thanks for any help, it will be greatly appreciated 

Question by monty324   |  last reply

Turning AM/FM clock radio into just a radio?

Hey guys, I'm new to this forum and couldn't quite find the answer to my question.  I have a cheapo AM/FM clock radio and thought it would be a fun Sunday afternoon project to turn it into just a radio.  I don't need the clock/alarm function anymore (I use my phone) and my dog likes to have some noise around when I'm not home (TV is an option, but I hate leaving the screen on all day).  Currently, the radio only turns on when the clock is triggered by the set alarm time...and it only plays for a max of 60 minutes.   Should be easy, right?  I opened the clock and couldn't quite figure out what I'm looking at...

Topic by Alischon   |  last reply


HI! GUYS// THESE IS ARCHEOPTERICS..I AM GOING TO BUILD A RADIO BUT SUFFERING FROM LOT OF PROBLEMS>>>I AM confused abt the basic circuit of the radio......anyone have idea abt that/////pls HELP......

Question by archeopterics   |  last reply

How to make a radio telescope (With simple tools)? Answered

Please tell me How to make a radio telescope (With simpleTools )?

Question by sky777   |  last reply

Battery removal from Mini Bluetooth Radio?

I have a battery that is dead inside a mini portable Bluetooth Radio, the radio can work only plugged for few minutes, then it turns OFF, a radio assistant says : "please recharge your battery"!!. As it is a Chinese product, i couldn't find this type of battery, i've taken out the battery and plug the radio directly to the adapter, the radio runs for 1.5 seconds then is turns off!! then a loop like this runs endlessly! so am wondering if there is any way to remove the battery element completely and use the Radio only with cable.

Question by Bouzenzel   |  last reply

Is using PCB in a radio circuit a problem? Answered

I am making this FM bug: . I decided that I would use this instructable as my first PCB creation. However, I read that the copper creates small capacitors and would ruin the circuit. Would this be a problem on PCB?

Question by seraine   |  last reply

Help to get rid of static on my alarm clock radio?

Every  time I take my hand away from my alarm clock radio there is static. Some times people walk in front of it there is static there.

Question by pheonix10   |  last reply

What can I do with parts from an old police radio?

I have an old police radio and i dont know what to do with the parts. Ive already taken it apart makeing sure i didnt break any of the parts, but i have no idea what to do now.

Question by Whiz kid   |  last reply

I need a small FM radio tuner that can be set up for presets?

I need a small form factor FM frequency radio with tuner that can be set up for presets and to a plug in power supply To be used on a exercise machine. It also needs a headphone jack.

Question by fiteqprpr 

How would I go about making a low power radio station? any helpful info would be... helpful.?

I would like to start a low power radio station, only part time on the weekends. What kind of equipment would i need? 

Question by kiffer360   |  last reply

can any one help me by saying any use of an old radio !!!!!!!!!! which works but i am not intrested , can i do

, can i do something else with it as i am a beginner !!!!!???????????? please help me !!!!!!!!!

Question by abhishek.sreeni   |  last reply

Find it

Find the antenna! I need to make it bigger.

Topic by thejrb   |  last reply

how to spy on police radio?

How can I spy on the Police Radio, or any Group that using any radio waves to contact with each others. I need a simple way to make a device to be used to spy on the police radio. thanx

Question by zicorados   |  last reply

27MHZ 2-way radio? Answered

I need help building a 27MHZ 2-way radio, as the title suggests. I really want to build one so I can learn more about how radios work. And it has to be 27MHZ. I would also prefer the transmitter and receiver to be separate circuits, so there would be multiple uses for this. Thanks in advance, Dan

Question by DanielB12   |  last reply

homemade rider to rider radios?

Does anybody know how to make a set of voice operated rider to rider radios that can fit inside a crash helmet? im a real noob with electronics but im slowly learning, i can make an led flash and a buzzer sound and by the morning should be upto speed with a number of gate types. im on help!!?


DIY radio tracking system?

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

Question by boiken   |  last reply

radio waves for a long range

How to create something for transmitting and receiving radio waves with data(binary code or hex code) for a long range and work with pc? or what material(device) i need for doing it. if have a idea write it. thanks in advance

Question by HosseinJ4   |  last reply

Simple radio transmitter question Answered

I am interested in building a small low powered radio transmitter. Searching the Instructables website I found some Instructables that have some with oscillators: Build a very simple AM Transmitter Make Your Own Low-Power AM Radio Transmitter Some other projects are built with timer chips and transistors: 555 AM Transmitter Easy AM Transmitter! Would someone please explain the theory or science, and advantages or disadvantages of the components involved when building each project? Thank you very much.

Question by blkhawk   |  last reply

Help with (streaming) radio, please...

Hello, everyone. I am trying to get live radio stations streamed on my laptop... so far I haven't found anything, and I don't even know if something like this exists. It would be helpful if someone could possibly help me find a program that could stream radio stations. If I need to buy a radio tuner for my laptop or something, I will, but if there is software for streaming it, I would like that better. Thanks to all the Instructables users for all of the help.

Question by account3r2   |  last reply

Credit card crystal radio

What do you think about the feasibility of a credit card sized crystal radio? (Fits inside a wallet) Some possible i though so far are... A simple pcb with a diode, and a capacitor and a coil wrapped(protected by duct tape) around it. The antenna has to be tied to a hole on a corner. Or it is coiled to the card, ready to be unwrapped. The ear piece can either be external... Or can be glued to the card itself, but you must put the card near you ear... Instead of a winded coil, maybe it can be part of the pcb design itself... and to tune it, you unhook a beady wire and place it in the holes placed in a interval. What do you think? Any more ideas? In fact. a competition can be made for this idea.

Topic by akimbo m   |  last reply

Crystal radio help anyone?

(If you want the blow-by-blow of my questions, skip the following gigantic piece of text and proceed to the 2nd list after the first)   I was reconsidering making a crystal radio the past week and so I set out to research the topic on the 2nd most popular information database on the internet which comes out of the 1st most popular one. According to wikipedia, all you need is one diode in order to split the AC signal coming in via the antenna in half, therefore it uses half-wave rectification (it's not quoted; it's what I understand from it). Could full-wave rectification be also used? Like connecting the antenna to a bridge rectifier (aka. diode bridge, aka. 4 diodes stuck together)? I know that half-wave rectification yields pulsed DC, but I also don't understand how. By that I mean what happens to the other half? Does the other half of the wave connect directly to the output? One last thing, I know the largest metallic object I can ever use as an antenna is basically just my roof, but then I don't like coming up to the roof and looking for some exposed metal to connect to. Any thoughts on what huge, metallic items I can use in my household? I've already thought up a list of what I could use for an antenna: -Window screens -Extremely long piece of wire (I have an 8 meter long CAT5 cable going from the 1st to the 2nd floor) -My front gate -Sheet metal laying outside my front door (not the gate) Here is the summary of all my questions: -Is this wikipedia article true? (see at the list "semiconductor" area) -Can full-wave rectification be used on such radios? -In the case of half-wave rectification, where does the other half of the signal go? -What can I use as an antenna (excluding my roof)? Aside from the asked questions: -Is there any other way to tune to a particular frequency? -I'm asking opinions to people who know what they're doing (no offense to beehard44, this is more of a poll that anything else).

Question by nutsandbolts_64   |  last reply

how to build a tesla radio? Answered

I need to make tesla radio as a fun project.

Question by nerd7473   |  last reply

My truck radio will not turn on?

When I turn my truck on the radio would come on and now it doesn't even show any lights on the radio to indicate power to it.

Question by phillip.webb.336   |  last reply

car radio LCD Arduino???

I got a old LCD from a car radio, can i connect it to my Arduino?? and if i can how??? plz help me im bored :(

Question by Dannne11   |  last reply

"Add on" radio volume control

I have a simple radio alarm clock with digital volume control.  But, the lowest available volume is still too loud.   How can I make it softer.  Can I simply solder in a resistor in the speaker wire, or add a pot?  Or is it more complex than that...  (if so, what resistance?)

Question by rnmerchant   |  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

Full duplex radio module? Answered

Hello I'm having some problems finding the correct modules. I'am trying to incorporate some radio's into some peltor headset's that i have. I want to be able to talk ( like a phone call ) without the push to talk button.. Is this possible? can i use RF? Or do I need to use bluetooth?

Question by Xyphion.   |  last reply

RC wired Tank to Radio? Answered

I have a Aoshima 1/48 scale RC Panther that I want to convert to Radio Control. Right now, it is wired(cable from controller to tank). Is there any way to convert it? And what do I need? Tank here: Detailed Intructions: Info: Circuit board seems to be in controller, not tank Battery also in controller, not tank.

Question by Derpzki   |  last reply

Bluetooth vs Radio Frequency Answered

This is a 3 part question: 1. I am a bit confused. Radio frequency covers 3KHz to 300GHz, so it basically includes bluetooth(2.4 GHz). Why is it that some people talk about bluetooth as something not relating to RF. Do they have different transmission methods? WIFI is also @ 2.4GHZ. What is the distinction between WIFI and bluetooth that makes them so different, covering different ranges, and being able to send different amounts of data at different speeds. I always thought it was the frequency of the wave but WIFI and bluetooth are the same yet they are so different.  2. I am building a project. I need to send data wirelessly. The data is very simple just to turn on or off a series of leds. A friend of mine told me to use radio waves. What does he mean by that exactly since radio range is huge. Is he talking about 40MHz like the RC cars? 3.Bluetooth or RF(again im assuming this to be the same one as RC cars since i will break apart an RC car to remove the transmitter/receiver)Which method consumes less power to send the same amount of data. Distance will not be over 10 meters so i'm not worried about that.  Thanks for the help everyone, much appreciated! Chris

Question by Chris414   |  last reply