Bluetooth speaker do it yourself

Wireless devices have several advantages over conventional ones. One of the most significant advantages is mobility, the ability to take such a device with you on any journey. However, wireless speakers also have a high price, which makes their acquisition impossible for a number of citizens. Then come to the aid of a simple instruction for making Bluetooth speakers at home with your own hands.

REFERENCE! For the manufacture of such a device will need not only all the basic elements that will be listed below, but also the basic skills of assembly and soldering from the user.

What you need to work

Details

  • For a full sound device will need speakers. In total, they should take 4: two for low frequencies, two for the upper ones.

REFERENCE! It is not necessary to use exactly 4 speakers. There are options for assembly with three speakers. One of them plays the role of a subwoofer, the other two are responsible for playing high frequencies. You can also use two identical speakers, which will not be divided by frequency.

  • Crossover with two channels (2 pcs.).
  • Two passive membranes.
  • Battery.
  • Charging.
  • Amplifier.
  • Bluetooth module.
  • Boost converter.
  • Power connector.
  • Toggle switch
  • Material for the body.

REFERENCE! Plywood will be the best material for the assembly of the case, as it is easy to reach and easy to handle.

Materials and tools

For the manufacture of homemade speakers need a number of tools and materials.

  • Glue.
  • Hacksaw, jigsaw and other tools for working with plywood or any material that will serve as the body for the device.
  • Marker, pencil and other items for marking.
  • Ruler

Assembly scheme

As can be seen from the diagram, the speakers are connected in pairs of high and low frequencies to the crossovers, which receive a signal from the amplifier. This is done to provide a better sound device. To increase the bass sound quality between the crossover and the woofer, you should also put a low-pass filter, which will remove all the upper harmonics, providing high-quality and deep bass.

Information from the Bluetooth module is fed to an amplifier, which is designed to pre-filter and amplify the signal. The amplifier module itself is powered by batteries (or batteries). The voltage from them rises to 14 V and is fed to the input of these two elements.

A protection board should also be positioned between the supply voltage and the step-up module, which will provide protection to the device against short circuits.

A simple way to make bluetooth speakers

In the first place for the manufacture of such a device need case. The best solution would be to make it. plywood.

Important! When choosing the size of the case, it is necessary to take into account that it must contain not only the entire electronic filling, including speakers, amplifier and battery, but also passive membranes.

Panels

On the front panel, you need to make holes for 4 types of speakers. A pair of large holes designed for woofers. Smaller holes are needed for tweeters. Devices should be placed in pairs, a pair of low and high frequencies on the left and right.

On the rear panel should be placed passive membranes, as well as connectors for charging and power switch.

REFERENCE! The best material for gluing plywood parts is wood glue.

Side panels must be sealed and processed, as the violation of their integrity will lead to deterioration of the sound quality in general and the appearance of unwanted body vibrations.

On the rear panel, as mentioned earlier, passive membranes are located, which significantly increase the depth of the bass. They are not electronic devices and do not require inclusion in the circuit. The membranes are attached to the case of helium super glue.

REFERENCE! In order to reduce the body's own vibration, you should glue a pair of MDF strips. This will prevent unwanted sounds caused by the wobble of the panel.

Assembly

After all the components of the body are ready, proceed with the assembly of electronic components.

Nutrition

Begin with nutrition. If the voltage will be supplied from the batteries, an additional protection card is required. Because lithium-ion batteries are very sensitive to both short circuits and excessive charges.

IMPORTANT! You should make sure that the voltage on all elements of the battery is the same. Otherwise, the device will work for a very short time.

Power switch should be connected together with the protection board.. When connecting the latter, observe the polarity, otherwise the device will fail. In order to verify this, you must first connect the battery and check the voltage.

Bluetooth

The next step is to connect the Bluetooth module. On this item there are separate outputs for power, separate outputs for audio. The module itself already has both an ADC and a receiving antenna, so it will receive and process the signal itself. Power to the module will come from the protection board to special contacts.

REFERENCE! This element should be placed in an accessible place so that the user has the ability to turn on / off, as well as pairing and setting at any time.

The Bluetooth module, in turn, should be connected to the amplifier via the boost stage.

The signal from the amplifier will be fed to crossovers, the main task of which is to divide the sound into high and low frequencies.. The corresponding speakers are connected to the corresponding output.

When all elements are connected, they should be placed on the back panel.. It is desirable that the wires do not overlap. This may cause unnecessary interference, which will disturb the sound quality.

After all the parts are placed, the front panel should be fixed. Portable column jbl assembled and ready to go.

Variants of portable bluetooth speakers that can be made independently

There are many variations of the assembly of Bluetooth speakers. You can use not four, but two identical speakers, to which the same sound will be fed. Such a device will have smaller dimensions, but the sound quality will be somewhat worse.

There are also variations of the assembly with two speakers for high frequencies and one large subwoofer.

Powerful or not the column will turn out depends on its components.

REFERENCE! The larger the size and power of the speakers, the greater the battery capacity will be needed to maintain the normal operation of the device.

If the user needs a very small portable speaker, then you can assemble such a device using only one speaker. All you need is a speaker, a battery (you can use it from an old phone), a Bluetooth module, a charge module, a gain stage and a power switch.

  • First of all, the battery must be placed in the case.. Connect the charge module to it, which is equipped with two LEDs indicating the charging process.
  • A Bluetooth module and a gain stage must also be connected to the battery.. The element for providing wireless communication must be connected via the power switch.
  • From the Bluetooth component, the signal will be sent to the speaker through the amplifier. On the module itself there are corresponding outputs that should be connected, observing the polarity.

Useful tips

When assembling, you should consider a few basic tips.

  • Do not forget about grounding.
  • Should be respected polarity. Otherwise, the device will fail.
  • Wireswhich connect the elements should be done as short as possible, and they should not intersect with each other.
  • The body must be sealed, as if there are unforeseen openings, they can vibrate, creating an unpleasant sound.
  • All major items should be easily accessible.
  • Components must be securely gluedTo avoid damage during transit.
  • To avoid short circuit inAll elements should be checked for polarity when connected.
  • The main elements that are responsible for adjusting and tuning (Bluetooth-module, power toggle switches, amplifier with gain control) should be placed so that their parameters are comfortable to control. You must also consider the possibility of replacing one of the components without having to disassemble the entire device completely.

Watch the video: Easy DIY Bluetooth Speaker Setup: Make Any Speaker A Bluetooth Speaker. How-To (March 2024).

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