DIY

Small external microphone for smartphone

Greetings, DIY !
In this article, we will look at the process of making one rather small, but very useful device.
 Small external microphone for smartphone Small external microphone for a smartphone Further instructions are taken from the YouTube channel “Levsha”.
Already quite a long time I was with the author of the iPhone 5s. So, this wired headset remained from him:
 Small external microphone for smartphone There is no longer any need for it, but what is inside is very interesting. We disassemble the wired headset and remove the microphone from it.
 Small external microphone for smartphone Small external microphone for a smartphone You still have to look for such tiny microphones, so it is interesting. In general, we take it out and check if everything is alive.
At first, the author wanted to remove the microphone from the surrounding main electronics, but after seeing the dimensions, he realized that this was not necessary. As a basis for the future microphone body we will use this minijack:
Small external microphone for a smartphone By the way, this entire microphone can fit in the plug body. After parsing, it is still necessary to test again to make sure that the contacts are correctly identified and whether any tracks are damaged during this procedure.
Small external microphone for smartphones As you can see, everything works, so you can start making the case. It was decided to make the housing for the microphone from brass.
Small external microphone for smartphone Someone will say that a small microphone for a phone can be bought, for example, on Aliexpress and will be right. Ali really presents just a huge selection of microphones in various price categories from 100 rubles to tens of thousands. But you need to carefully look so that the wiring is suitable, otherwise you will have to additionally purchase a special adapter. In general, to each his own, it is really easier for someone to buy a finished product and “not take a steam bath”, but we will continue to craft with our own hands and enjoy the process.
Small external microphone for a smartphone The application “Dictaphone”, which the author has downloaded and installed on his smartphone, allows you to select the sound source, be it a built-in microphone or an external one. Thus, if you choose a good directional external microphone, you can cut out unnecessary side sounds. There is a field for experiments here, and we will use this. The future microphone, although it will be rather small, but on an anti-vibration base, everything is like an “adult” microphone.
The first thing to start with is to make an outer ring.
 Small external microphone for smartphone After grooving, you need to drill 16 holes. These holes are needed for the future vibration damper. Hole diameter 0.6mm. We drill with manual feed, the drill is quite thin and can easily be taken away.
 Small external microphone for smartphone In addition to these holes, you need to drill another one through which the wire to the microphone will pass.
Small external microphone for smartphone The first part is ready, you can cut the workpiece.
Small external microphone for smartphone At this stage, you need to remove all sharp edges on the just made ring.
 Small external microphone for a smartphone Now you can start making the body of the microphone itself. To do this, you need a brass bar with a diameter of 10mm.
Small external microphone for smartphone First you need to prepare a niche for electronics and make a small sample to fix the outer protective mesh.
 Small external microphone for smartphone With the inside finished, then you need to slightly refine the product from the outside, and then cut off the workpiece.
 Small external microphone for smartphone Here is such a “bowl for flies” at this stage:
Small external microphone for smartphone Now you need to drill a hole for the wire in the side of the workpiece.
 Small external microphone for smartphone In the meantime, we have come to the most difficult and, probably, the longest process. This microscopic body requires 4 micro-mounts for the vibration damper. In order to somehow facilitate the task, it was decided to do this operation on a laser machine by sampling material around the parts.
Small external microphone for smartphone Small external microphone for smartphone First, the engraving process takes place, and then cleaning, and so many, many times. The thickness of the brass sheet is 1mm, the whole process took a little over an hour. The laser burns from one point, and therefore the parts are beveled. For this reason, the resulting blanks need to be finished by hand, but this is still easier than doing everything entirely by hand without resorting to a laser machine.
At this stage, it is also necessary to process all sharp edges so as not to rub the rubber vibration damper.
Small external microphone for smartphone Small external microphone for smartphone Further, the following rings were made from the welding wire:
 Small external microphone for smartphone we will use them for fixing during soldering. This is how it all looks now:
 Small external microphone for smartphone Of course, microwelding is better, but for now we will solder. In this case, you cannot use open fire, otherwise the solder will spread faster than the part warms up.
Small external microphone for smartphone As a result, here's what happened at this stage:
 Small external microphone for a smartphone Now the part needs to be washed from the flux and polished. But first, let's get rid of the temporary rings. We'll just cut them and remove the remnants.
Small external microphone for smartphone  Small external microphone for smartphone It turned out of course not quite perfect, but not to say that it is ugly. You also need to make a small protective mesh, but first you need to make a specific tool for this.
 Small external microphone for smartphone The master has such a fine stainless steel mesh:
Small external microphone for smartphone A couple of blows with a special home-made tool and a convex part is obtained, which remains to be cut with a laser, and the protection is ready.
Small external microphone for smartphone Small external microphone for smartphone Since the wire is quite thin and can easily overheat, cutting should be done with small pulses.
 Small external microphone for smartphone It turned out fine, the way is working, you can use it.
Now let's start making the last part – the minijack body, which is the base of the entire microphone. It is necessary to cut a thread in it and make a sample for connection with a large ring.
 Small external microphone for smartphone The thread at the minijack body with a pitch of 0.75, it is fixed there quite well.
Small external microphone for smartphone Now remove the excess material and cut the workpiece.
Small external microphone for smartphone Next, we mill the part from the reverse side.
 Small external microphone for smartphone At this stage, the two pieces need to be soldered together. To do this, you need to warm up the workpieces from all sides so that the solder spreads evenly.
 Small external microphone for smartphone Small external microphone for smartphone The result is very good, you can collect the filling. But first, the inside of the case must be insulated to avoid short circuits.
Small external microphone for smartphone Now you need to put the electronic stuffing into the case and glue the protective grill.
Next you need to cut off the unnecessary part of the minijack.
 Small external microphone for smartphone Then we pass the wires through the central hole and solder them into place. And, until the central part is fixed, you need to screw in the minijack.
 Small external microphone for smartphone And the final touch is the good old Soviet gum. The vibro suspension will be held on it.
Small external microphone for smartphone There may be thinner elastic bands, but this will do. Armed with tweezers, we remember sewing in childhood, but on a different scale.
 Small external microphone for smartphone After all the loops are threaded, the ends need to be glued. Now you can fix the microphone. In this case, a toothpick is a great tool here.
 Small external microphone for smartphone Well, in principle, everything is ready. The author has a large microphone fixed in the same way. He actively uses it when dubbing his videos on YouTube, and now there is a small one.
 Small external microphone for smartphone The wires are brought up specially to slightly reduce their rigidity. Perhaps this particular microphone from the headset is not the best option for alteration, but the design itself has the right to be. The microphone was successfully recognized by the smartphone, which is good news.
 Small external microphone for smartphone  Small external microphone for smartphone The advantage of this design is that such a microphone can be rotated in the direction of the sound source we need, thereby cutting off unnecessary noise.
On that's all. Thank you for attention. Until next time!
Author's video:

Source:

usamodelkina.ru

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