what to do with wires when remove phone jack
It doesn't thing if you lot call it an earphone or headphone jack---it'south still on just about every smartphone. With rumors that Apple tree will kill the the earphone jack on the iPhone 7 to make it thinner, I think this is a good time to look at this surprisingly simple piece of technology.
It's all well-nigh a consummate circuit
At the most basic level, an earphone is a loop of wire with electric current running through it. This electric electric current in the loop and so interacts with a permanent magnet which in plough pushes the air---that's sound. Yes, I left out a lot of the details, but that's plenty for now (and in that location are other ways to make a speaker, but this is the nigh mutual). The key thing to remember is that y'all have to have current going through this loop of wire in order to make sound.
If you want an electric electric current, you almost ever need a complete circuit. Think of this simple circuit with a battery and a lightbulb.
Hither the current comes out of the battery, goes through the seedling so back into the battery. This is a complete circuit. The speaker in the earphone is the aforementioned mode except for two differences: The bombardment is replaced with an aquiver source (for music and stuff) and the coil replaces the bulb.
Of course, that'south merely i speaker. Normal earphones have 2 speakers---ane for each ear. Oh, here is an actual earphone that I took autonomously. You tin meet the coil right there.
The cylinder in the middle is the permanent magnet.
Looking at the plug
But the main signal of the earphone jack is the plug itself. This allows y'all to quickly connect your speakers to the music source without actually having to connect any wires. Let's take a look at one of these plugs close up.
The iii arrows point to the three connexion points for the two speakers. Yes, each speaker needs ii wires simply it seems the plug is missing a connectedness. But you can effigy out where these different connectors lead to with a uncomplicated investigation. Offset with some crappy or broken earphones (you don't desire to cut up skillful ones). Cut off the end of the headphone cable a few centimeters from the plug. Next strip off the insulation on the cutting terminate of the wires.
What will practise is to use this headphone wire as just a wire to light a bulb. Connect an alligator clip wire to one of the stripped earphone wires and the other end to a battery. At present utilise another alligator clip to go from one segment of the earphone plug to a lightbulb and then another wire to connect from the bulb to the bombardment. If that plug segment corresponds to the earphone wire, then you will have a complete circuit and the seedling will lite---like this:
Aye, that bulb is on in this pic (it'south just difficult to see). Too, if you desire a dissimilar method you could just use a multimeter to measure the resistance betwixt plug segment and wire. If the resistance is zero (or close to nil) then y'all found a match. Adjacent y'all can switch to another end of the earphone wire and notice its corresponding plug segment.
But what about the three segments versus the iv needed wires for speakers? It's all about sharing. Ane wire from the left speaker and one wire from the right speaker share the meridian segment on the earphone plug so that you only need three of these segments. Become ahead and exam it for yourself.
The electric current iPhone plug is really different than a normal plug. Take a look.
Find the Apple earphone plug has four segments instead of iii? That'due south because this set of earphones has a microphone to keep with the ii ear speakers. In fact many earphones are like this---non but Apple tree. Since the location of the bottom two segments are still in the same place, an Apple earphone volition fit in any earphone jack and whatsoever earphones will fit in an iPhone---at least for now.
Oh, I should point out that amend earphone cables can look a fiddling bit different. Frequently these cables will only have three distinct wires within instead of the four as seen in the cheap earphones. By creating it this way the wires can be electromagnetically shielded from other cables---but that is a topic for another day.
Build your own earphone
Like I said, a speaker is a pretty simple device. It's so simple you could make your ain. All you lot demand is the earphone cable you already cut upwardly along with a cup, some wire and a magnet. Accept the wire and wrap it around the lesser of a plastic cup and tape it downward so it is mostly stationary. Now connect this loop to 2 of the wires from your earphone cable. Exist sure to utilize a pair of wires that go to the same side of the earphones or it won't work. Finally, just add together a magnet to the lesser of the loving cup and plug your new speaker into your iPhone or reckoner. OK, I'll acknowledge that it won't be very loud but it should piece of work.
Hither is a picture of my version.
It doesn't take to be pretty to work. Also, if yous get a stronger magnet it will probably sound better or at to the lowest degree louder.
The past and hereafter of the earphone jack
Let me start with a haiku.
I know---that haiku doesn't include an element of nature. Sorry. Perchance the coolest aspect of the earphone jack is the age. Humans have been using this form of a plug and jack for over 100 years (OK, the original plug was bigger---but still). In fact, the history of the earphone jack is really quite interesting. In particular, I similar this BBC mail that takes a look at the history of this plug. As another resources, take a await at the look at the Wikipedia page on the phone connector. Adept stuff.
Source: https://www.wired.com/2016/09/physics-earphone-jack-works-just-time-say-goodbye/
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