general description homemade
The idea of this homemade product was to refine the KOSS porta Pro headphones and save them from the eternal and only problem. Fans of these headphones have already realized what kind of problem they are talking about, for the rest I’ll explain. These headphones are almost the best in terms of the range of reproducible frequencies and at the same time represent the pinnacle of simplicity and compactness of the arc headphones: nothing more and great sound. But their only sore spot is a wire with a 3.5 mm jack, which breaks mostly just in the area of the jack, less often around the speakers. And in general, the wire does not interfere slightly when doing something with headphones on the head. Plus, it’s not always convenient to take the phone out of your pocket to switch the track or decrease / add sound.
So, we make wireless headphones. To do this, we need any arc headphones, (in my case, KOSS with a faulty wire), a bluetooth device (Bluetooth Audio Receiver) that communicates with the phone and other playback devices and a set of tools. However, much of the list below is not mandatory, but rather preferred.
Materials and tools:
- Full-size headphones (arc);
- Bluetooth Receiver (Bluetooth Audio Receiver);
- Paper or cardboard;
- screwdriver;
- scissors;
- Plexiglase;
- A piece of wire from the headphones;
- Files;
- Soldering iron with consumables;
- Knife;
- awl;
- Ruler;
- Pencil;
- pliers;
- gas hair dryer;
- Heat-shrink tubing;
Detailed manufacturing description:
Step 1: We disassemble the headphones: remove the ear pads, disconnect the speakers from the arc, solder off a long wire with a connector and determine the location of the bluetooth receiver. I chose a round device with matching color accents. I bought it in Chinese Taobao (or on Ali), the issue price is 30 yuan or 260 rubles (anyone interested is attaching a link below) There was still a black hex bluetooth, but this one was better suited to my headphones:,
Step 2: We cut out a fastener pattern for a bluetooth receiver from paper or cardboard. You can of course just stick it to the headphones, but I decided to make it removable to use with other devices, such as 5.1.
Initially, the pattern had a T-shape, but it turned out that the clothespin on the receiver is located at an angle relative to the control buttons, And if you do not change the shape of the fasteners, then it will be difficult to hit the desired button with your finger when the headphones are on your head.
Step 3: Next, I transferred the pattern to a plexiglass (2 mm thick) and sawed it out using a nozzle on a screwdriver. You can get by with a regular metal file or burn it with a soldering iron - to whom it’s handy.
When the workpiece is cut, we process the edges with a file and fine sandpaper, if necessary, can be polished. It is better to do this before you start bending the workpiece, because it is much easier to process or polish a flat part.
Step 4: Using a gas hairdryer we warm up the plexiglass and give it the desired shape. I had to bend it a little so that the receiver did not come in contact with the headphones and as a result of vibration there were no extraneous sounds - all the same, headphones are usually used when walking or when riding a bicycle or motorcycle.
I also bent the edge of the mount so that the device does not slip. If there is nothing to warm up and bend the plexus, then at the end you can simply make an extension or use a hook-and-eye closure as a fastener (popularly referred to as Velcro).
To make the receiver mounting area smooth, it is necessary to cover it with heating with heating with a plex (I did this with a knife blade)
Step 5: We drill holes and select bolts and nuts. On the headphones themselves, grind all the bumps, for a more tight connection (On KOSS porta Pro, this is the convex letter R - designation of the right ear). Also in the mount, I drilled recesses to slightly drown the bolt caps. And the nuts were hidden behind the rim on the headphones themselves, so on the inside it was only necessary to drip super glue to fix the nuts to the bolts.
Step 6: Putting it all together and checking the correct location of the bluetooth receiver relative to the headphones (everything should be beautiful and symmetrical). We cut two pieces from the old wire. One short one is for the right ear, on which the bluetooth will be located. And one long one is for the left ear (he will also insure the headphones from falling when they fall off his head, for example, from a strong wind. This happened on a motorcycle). We clean the wires and remove the central nylon core, as it interferes with soldering and does not allow normal wire tearing.
Step 7: To make the whole design look more aesthetically pleasing, I passed the wire through the rope. To stick the wire inside the cord, a ballpoint pen rod with a hole drilled at the end is well suited. Previously, a rubber band was threaded into underpants using a similar method.
Solder the wires in order (as if the jack is inserted into the device) starting from the socket:
1. Yellow wires (there are two of them - one in each channel)
2. Color wire of the right channel
3. Color wire of the left channel
Step 8: We put two heat shrink tubes on the wire that will cover the place where the wires are attached to the jack and hold the braid from the lace in place. For reliability, I smeared glue on the edges of the braid so that it fits tightly and does not unwind. If you use kapron lace, you can just scorch the edges. Cotton came to my hand, so I used glue.
Heat shrink with a gas hairdryer should be extremely carefully so as not to burn anything superfluous. It will be a shame if, at the final stage, you have to redo everything because of a melted wire or braid from a lace.
Step 9: We fasten the speakers to the arc, put on a pre-charged bluetooth receiver on the bracket, connect the power plug of the speakers, set up the connection with a smartphone or other player and enjoy!
Conclusion: In fact, the headphones still have a wire, but are wireless, regarding the method of transmitting a signal from a smartphone.And if you use headphones for homemade work, in which the wire fits only to one ear, and the second is powered through a secret wire inside the arc, then all the wiring can be hidden inside the headphones or bluetooth receiver.
All home-made fit perfectly in the native case, although there were concerns about this.
A nice bonus, it turned out that in this model of the receiver there is also a microphone, so the headphones can also be used as a headset.
