Instructables

FM receiver from old dead headphones

Have you ever wanted to listen to the radio while you exercise or just walking but also wanted not to wear headphones? This instructable will show you an easy way of transforming your dead headphones into a tiny fm receiver.
 
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Step 1: The materials and tools

You will only need an old pair of headphones and a pair of scissors

Step 3: The End

Now you have got rid of the "Plug-In Your Earphones" error. This transmitter can be used with any device that has fm and can output from speakers
dwsworks8 months ago
oh it does not work, though if u r in good coverage area, it should work.
hahaa you might not speak great english but just a mistake i had a lol about is for step one. your scissors arent headphones man hahaa juss saying
How is your Greek?
english is my only language mate
Remember that before you make fun of someone that is not a native English speaker.
i did not mean to offend. where i am from this is a joke. i mean to laugh with you not at you. i apologize if you did not see it this way
I'm sorry! I did not know you are an Aussie. I love your sense of humor. It is very rude in America. Carry on mate.
no worries, in future ill try to be more aware of what im saying :)
zack2473 years ago
its kind of strange that manufacturers would choose to use the headphones as the fm antenna and not the big grounding contacts on the board, the only problem with this is if you have a phone or mp3 player that switches from speaker to headphones when a jack is inserted, in which case this would cancel out the sound.

nice and simple though! i give it 5*s.
the headphone cord doesn't pick up anything, the antenna is inside of your mp3 player picks it up, and i pods, surprisingly enough, dosent have any internal radio
arv_christos (author)  newwarhammer23 years ago
It may be that way but when I cut all the headphone cord from a pair of apple headphones the signal was lost.
The Iphone headphones have a different mini-phono jack than regular headphones.

Iphone uses a FOUR connector jack, where as normal headphones use a 3-connector.
http://images.appleinsider.com/ipodiphoneav-review-5.jpg

You'll have the same problem using the jack from some of the older wired cell-phone headsets.
Basically, you end up either NOT making contact, or making overlapping contact, inside the jack...

Likewise, if you try to use normal headphones on an iphone/ipod... you'll end up with sound out of one ear only, usually.
rimar20003 years ago
Is this a joke?
arv_christos (author)  rimar20003 years ago
Is there any specific reason why this ible could be a joke?
Because a piece of cord in the earplug does not converts an audio signal to RF signal. Your instructables was named "FM transmiter..." at first. Now you changed the tittle, that change changes the thing. Pardon if I offendded you.
The Android "FM RADIO" application won't turn on, without earphones plugged in.

This is partially because it uses the headphone cord to act as a secondary FM antenna(the cellular antenna is the "primary" but is low gain, because of the size, and the fact that FM is on the very edge of the frequency range it was designed to receive)

I WOULD suggest a longer length of cord though. The longer the dangle, the better the reception... up to 0.92 meters in length(for 101.9FM).
That's the 5/8ths wavelength measure... optimal for FM reception.
randofo3 years ago
I think you mean FM receiver
to be fully correct he's making a FM antenna
arv_christos (author)  randofo3 years ago
Thanks for the correction. You know I am from greece and I am not a native english speaker
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