Homemade Bluetooth receiver for home acoustics

Homemade Bluetooth receiver for home acoustics

Nowadays many acoustic speakers are sold that have a card reader. You can install a memory card or USB flash drive. This is of course great, but what if someone wants to listen to music from their phone? You need to pull out the card and insert it into the card reader. It's inconvenient. I decided to go a different route. I ordered a Bluetooth module from China. Entitled BK8000L. It is very convenient and has many functions. It has one drawback, a very minor one. Well, it’s okay, we’ll manage.

Will need


For the body I will need plastic. I have deposits.
Homemade Bluetooth receiver for home acoustics

I cut out several blanks from plastic. A pair with dimensions of 5*10 cm and a pair with dimensions of 3*5 cm. I will cut out the rest of the pair later.
Homemade Bluetooth receiver for home acoustics

To output the audio signal I will use two different jacks. One tulip-type connector cut from a large block.
Homemade Bluetooth receiver for home acoustics

The second jack is like on headphones, with a size of 3.5 mm.
Homemade Bluetooth receiver for home acoustics

To connect an external power supply, I will install a 5.5x2.1 mm connector.
Homemade Bluetooth receiver for home acoustics

To turn off the device you need a switch. I used it from an old lamp.
Homemade Bluetooth receiver for home acoustics

Here is the module itself. Compact and functional.
Homemade Bluetooth receiver for home acoustics

I almost missed describing the main thing.The device is self-powered, yes. I will feed from pairs of Li-ion batteries, with an approximate capacity of almost 4.5 Ah.
Homemade Bluetooth receiver for home acoustics

I'll charge controller from China. I have a board without protection. I applied separate BMS board.
Homemade Bluetooth receiver for home acoustics

Bluetooth receiver assembly


Let's move on to assembling the box. In one blank I make a cut for the “tulip” connectors and a connector like on headphones.
Homemade Bluetooth receiver for home acoustics

In the second blank I make a window for the power and charging connector.
Homemade Bluetooth receiver for home acoustics

Now we can glue our blanks. It turned out something like this. I glue the tulip connectors with super glue and soda. I'm trying on a 3.5 mm jack.
Homemade Bluetooth receiver for home acoustics

I cut out a window for a switch. I cut out the side blanks. I installed them temporarily and painted the body.
Homemade Bluetooth receiver for home acoustics

A few words about the diagram, in which everything is clear. The scheme is in principle available on the Internet. An external source is connected to the connector in the upper right corner, or you can connect micro USB charging to the controller. Power goes to the battery and through the switch to the module. The output signal goes to the output connectors. Whether it's a tulip or a 3.5 mm jack. The plus in the diagram is red, the minus is blue, respectively. We solder according to the diagram, everything is simple. Also installed Light-emitting diode. To indicate power on.
Homemade Bluetooth receiver for home acoustics

The controller was soldered to the battery. Connector for power supply to the controller. At the same time, I soldered the output connectors.
Homemade Bluetooth receiver for home acoustics

I glue the batteries, charge controller board and bluetooth module with thermal glue. I solder the wires to the switch.
Homemade Bluetooth receiver for home acoustics

Homemade Bluetooth receiver for home acoustics

Everything goes together very simply. If you have a soldering iron, it will not be difficult to assemble this design. I glue the side blanks. This is what the finished design looks like. Everything works perfectly. I connected it to a homemade amplifier and to a 2.1 system.
Homemade Bluetooth receiver for home acoustics

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Comments (2)
  1. Petrovich
    #1 Petrovich Guests July 2, 2019 11:23
    3
    There are a bunch of ready-made solutions from China. On fig this hat?
  2. Sanya
    #2 Sanya Guests 18 July 2019 09:41
    1
    100% bought everything and assembled it)) it smells, the car is from Europe, the components are from China and the assembly is in Russia! and it costs 2 rubles!) and it will work for 2 days! I just got lost for myself, my beloved, there’s nothing to do...yy