The leader of bluetooth headphones in China

3d printed bluetooth headphones

by:ROYAL TANIC     2020-03-30
These headphones are the Bluetooth evolution of my original wired design, all except the circuit board
Amazon, ebay, parts Express etc can easily buy printed parts.
Circuit boards can be made easily.
They sound great, have a long battery life and are charged via a micro USB cable.
If you are interested in my research on how design variables affect sound, it can be found on www.
Home headphones.
Comparison to purchase: Insert the drive into the part of the baffle, oriented according to the yellow circle.
Be very careful not to damage the fragile Mela film on the driver.
The Gear plate of the glue\'s driving factor is four 1/4 \"(6mm)
The point of length of the glue, evenly placed around the driver (
Blue Arrow in figure).
Do not glue around the driver\'s entire perimeter as this will adversely affect the sound.
Wait until the glue is dry . . . . . . It\'s time for secret sauce!
In this case, Dayton audio CE38MB-
32 drivers are too bass.
Heavy, lack of high-end detail, so we need to reduce the mid/bass to make it more equal to the treble.
You might think more. is-
More about bass, but there will still be a lot after completing this step.
Make a backup if you don\'t believe meto-Reverse comparison.
Using plasticine or something like that, roll a small amount into the sausage and then plug all the holes except one hole under the black fabric on the driver\'s back.
The Black Arrow in the picture shows nonblocked hole.
On the battery side, the wire is about 50 cm (20\")
Connecting cable to the driver terminal.
Attach a label \"audio\" and run it through the headband slot on the bezel.
As shown in the figure and the picture, connect the power electronic equipment.
According to/-connect the wire to the outside two terminals on the battery
Mark on the battery.
I found that the best way is to connect a drop of solder on the battery terminal and reconnect
Melt it and slide it over the wire.
Note: Be careful not to apply too much heat to the battery terminals.
I also recommend wearing safety glasses.
Be careful not to short-circuit the positive and negative poles of the battery. Solder approx. 50cm (20\")
Wire attached to the outside
Terminal of BCM and switch.
This will be routed to the audio circuit via the headband.
Pass the wire through the headband slot and attach the label with \"power\" on the wire.
Plug the USB splitter board, switch, BCM and battery into the position on the baffle.
Make the Cut 30mm x 50mm part of the blank PCB material.
Print board layout (
Make sure it\'s 1:1)
Use a laser printer on smooth paper.
Secure the print output surface on the board using masking tape and iron the back of the paper for about 30 seconds to transfer the laser printer ink to the board.
Soak it in ammonium sulfate according to the instructions on the package (
I give it to AP with 4:1 water).
Drill holes using 1mm drill bits.
Route the wire through the headband slot to connect the wire in 4 strands (Power and audio)
Enter the slot of the headband, work from the battery side, and the headband has just come out of the slot.
Attach the gaffer tape to the outside of the headband and fold it inward to retain the wire.
Run the tape only between the two travel stations on the inside of the headband.
Attach the headband to the battery side baffle.
Connect the assembly to the board using masking tape or similar tape, tape the Bluetooth module onto the board, align the terminals, and keep the long side idle.
Weld the Bluetooth module to the board.
The easiest way is to run the soldering iron along the terminal and open the soldering tin as you go.
Check the terminals carefully and run the soldering iron back and forth to weld any missing parts.
If adjacent terminals Bridge, welding can be eliminated by cleaning the soldering iron and running along the terminals.
Repeat it on three sides.
Weld the 10 k resistance in place.
It should be on the other side of the Bluetooth board.
Use the connecting cable to connect the micro switch and drive on the side of the audio board.
Run the battery side power supply and audio line through the headband slot on the baffle and cut them into length.
Then connect all the wires to the circuit board according to the chart.
Connect the driver on the Bluetooth side to the board.
Plug the board in the appropriate position and connect the headband to the Bluetooth side.
Install the volume button, lid, cushion and felt onto the baffle.
The mat is quite tight, but it\'s easiest if you finally fit on a long side.
In my case, the Bluetooth ID is F-3188.
Open them, pair them, start them and enjoy!
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