Do-it-yourself simple Bluetooth speaker (KIT-set). Do-it-yourself bluetooth for active speakers. Homemade Bluetooth speaker. How to make a bluetooth speaker with your own hands? Can I make a wireless module myself? DIY Bluetooth speaker from

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

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

What you need to work

For full-fledged sound, the devices will need speakers... In total, they should be taken 4: two for low frequencies, two for high frequencies.

REFERENCE! It is not necessary to use exactly 4 speakers. There are options for assembling with three speakers. One of them acts as a subwoofer, the other two are responsible for reproducing high frequencies. You can also use two identical speakers, which will not be split in frequency.

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

REFERENCE! Plywood will be the best material for assembling the case, as it is easy to reach and it is easy to process.

Materials and tools

To make a homemade speaker, you will need a number of tools and materials.

Glue.
A hacksaw, jigsaw and other tools for working with plywood or any material that will serve as a housing for the device.
Marker, pencil and other items for marking.
Ruler

Assembly diagram

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

Information from the Bluetooth module goes to the amplifier, which is designed for pre-filtering and signal amplification. The amplifier module itself is powered by batteries (or rechargeable batteries). The voltage from them rises to 14 V and is applied to the input of these two elements.

A protection board should also be placed between the supply voltage and the step-up module to protect the device against short circuits.

A simple way to make a bluetooth speaker

First of all, for the manufacture of such a device, you will need frame. The best solution would be to make it. plywood.

Important! When choosing the size of the case, it must be borne in mind that it must contain not only all the 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 are provided for the woofers. Smaller holes are needed for the tweeters. Devices should be placed in pairs, a pair of LF and HF left and right.

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

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

Side panels must be sealed and treated, as breaking their integrity will result in poor overall sound quality and unwanted cabinet vibrations.

On the rear panel, as mentioned earlier, there are passive membranes, which significantly increase the depth of the bass. They are not electronic devices and do not need to be included in the circuit. Membranes are attached to the body with helium super-glue.

REFERENCE! In order to reduce the body's own vibration, a couple of MDF strips should be glued in. This will prevent unwanted sounds caused by panel vibration.

Assembly

After all the components of the case are ready, you should start assembling the electronic components.

Nutrition

You should start with nutrition. If the voltage is supplied from the batteries, an additional protection board will be required. Because lithium-ion batteries are very sensitive to both short circuits and overcharging.

IMPORTANT! Make sure that the voltage across all battery cells is the same. Otherwise, the device will work for a very short time.

Together with the protection board, the power switch should also be connected.... When connecting the latter, the polarity must be observed, otherwise the device will fail. In order to check this, you must first connect the battery and check the voltage.

Bluetooth

The next step is to connect the Bluetooth module. This element has separate outputs for power supply, separate outputs for audio signal. 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 located 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 through a step-up stage.

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

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

After all the parts have been placed, the front panel should be secured. The jbl portable speaker is assembled and ready to go.

Portable bluetooth speaker options that you can make yourself

There are many variations on assembling 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 slightly worse.

There are also assembly variations with two tweeters and one large subwoofer.

Whether a column is powerful or not depends on its components.

REFERENCE! The larger the size and power of your speakers, the more battery capacity you need to keep your device running properly.

If the user needs a very small portable speaker, then such a device can be assembled using only one speaker. To do this, you only need the speaker itself, a battery (you can use it from an old phone), a Bluetooth module, a charge module, an amplification stage and a power switch.

First of all, it is necessary to place a battery in the case... Connect the charging module to it, which is equipped with two LEDs that signal the charging process.
A Bluetooth module and an amplification stage should also be connected to the battery.... The element for ensuring wireless communication must be connected via the power switch.
From the Bluetooth component, the signal will be sent to the speaker through the amplifier. The module itself has the corresponding outputs, which must be connected observing the polarity.

There are a few basic tips to keep in mind when assembling.

Do not forget about grounding.
Should be observed polarity... Otherwise, the device will be damaged.
Wires, with which the elements are connected, you should do as short as possible, and they should not intersect with each other.
The case must be sealed, as they can vibrate if they have unintended holes, creating an unpleasant sound.
All basic elements should be easily accessible.
Components must be securely glued to avoid damage in transit.
To avoid short circuits, All elements should be checked for polarity when connected.
The main elements that are responsible for adjustment and tuning (Bluetooth-module, power toggle switches, amplifier with gain control) should be placed so that their parameters can be controlled comfortably. It is also necessary to consider the possibility of replacing one of the components without having to disassemble the entire device completely.

CubeBox is a homemade ultra-portable wireless speaker with impressive bass and attractive design.

Distinctive features:

high efficiency of audio effects, due to the use of 65 mm stereo speakers
Long battery life - up to 8 hours of continuous music playback.
Pairing is possible with any Bluetooth - compatible device, including smartphones, MP3 players, tablets and computers.

Specifications:

Two full range 3W stereo speakers.
High performance amplifier PAM8403.
Long lasting 5200mAh battery.
Micro USB charging.
Bluetooth

Speaker making

Video instructions for making

Materials and tools

We need these next parts and tools to make this bluetooth speaker.

Materials (edit)

Stereo amplifier module PAM8403;
3W stereo full range speaker - 2 pcs .;
Micro USB charging module;
Bluetooth module;
18650 li-On battery - 2 pcs;
DC switch;
Boost Converter;
wires;
Acrylic sheet 4 mm thick.

Instruments

Saw for metal;
Bur machine / Dremel (optional);
soldering iron;
Glue gun;
wire cutters and strippers;
duct tape.
Super glue.
Marker.
Crown.
sandpaper or file

Manufacturing of the case

We glue the speakers with a glue gun, there is a very important point here. It is necessary to go very well around the edges with glue to ensure a snug fit to the acrylic wall.

The sequence of gluing the walls of the body.

Gluing the cut-out parts of the future column with can be done with quick-setting glue.

First apply super glue to the edges of the speaker frame, then carefully position the 2-wall speaker and hold it slightly until they are well glued.

After that, you can glue another wall.

For fixing, you can use various devices as you like.

Soldering modules

The most interesting thing in assembly for many is the soldering of the components, everything is very simple here:

First, let's connect the amplifier and the BT162 Bluetooth module.

We turn on and heat the soldering iron.

Chorus the wires (red and black) of the power supply to the amplifier, then the wires (green, yellow, blue) to the audio input, be sure to check the correct polarity.

Add a power module.

Using this module, you can increase the voltage to the required 5 volts.

A blue potentiometer is used to regulate the voltage. We solder 2 wires each to the step unit and to the charge module.

Installing the chassis components

Charge module and switch

First, we glue the charge module, for this we use a glue gun. It's fast and cheap. Then glue the switch and solder the wires from the charge module to the switch.

Battery

We solder and glue together 2 rechargeable batteries of the 18650 type and glue the assembly on the back panel wall. Where the charge module was placed.

Installing the main modules

First, we install the voltage converter, then the rest of the modules, we fix everything in the same way using thermal glue.

After installing the components, we make the final soldering.

We solder the power wires from the step module with the switch, remember to check the polarity, this is very important.

Bonding the back panel.

After all the components are assembled, we glue the rest of the body walls, carefully apply the glue and hold the walls until the glue grabs.

Apply a generous amount of super glue to the edges first, then gently attach the back panel and hold for a little while until it stuck properly. At the end, apply hot glue to attach the back panel more tightly.

After fixing the rear panel, we solder the speaker wires to the amplifier, check everything for operability. Final assembly.

Then you can glue the rest of the body parts. After gluing with sandpaper and a file, you can clean the edges of the walls from traces of glue.

That's actually the whole instruction, I hope you liked it.

14.02.2018

Technological progress is moving forward by leaps and bounds, now even preschoolers have a mobile phone and are able to access the Internet, and seeing a person talking to himself on the street, no one twists a finger at his temple - everyone is already familiar with a Bluetooth headset, which belongs to wireless technologies. Such a transmitter works using encoded signals, which, in addition to convenience, allows you to protect personal data. The wireless module allows you to establish communication among several devices.

Many of the most modern models are already integrated, mainly to facilitate pairing with smartphones. Simply increase the distance between the sound source and the loudspeaker and walk without having to search, enter menus, download configuration apps, or enter pairing codes.

As for the profile, the one that is supported by our presenter, one or the other will determine from the functions of the same sound quality that we can get. Both of them must be compatible with the same profiles in order to use them. It is most commonly used to receive audio content over headphones. ... Other solutions are already there when some brands are loaded.

Bluetooth application

This device is now built into almost all cell phones, many laptop models. This allows them to significantly expand their communication skills:

You can exchange various files (photos, videos, music) between phones, phone and laptop, communicator, camera.
The module allows you to connect any peripheral devices (wireless headset, headphones, speakers, video cameras and other gadgets) to phones or personal computers.
Talking on the phone without holding it with your hands.
You can create a wireless network between several of your PCs and other devices at home or in a small office, which allows you to have constant access to the files you need from any device.
A Bluetooth adapter makes it possible to access the Internet by synchronizing a PC with a mobile one.

That is, wireless devices are necessary not only to use a hands-free headset, but also facilitate communication between a computer and gadgets.

If we're already pairing them, it's more direct to start sending audio whenever we want, without waiting. Reducing the size and weight of a speaker usually results in a decrease in performance due to the use of different materials in both the cabinet and the drivers. There are details in the design of a wireless speaker that are usually rated as handles or the ability to carry covers or carry them from one side to the other in a backpack without difficulty or undue inconvenience.

Technical requirements for consideration

If we intend to use the equipment outdoors frequently, we strongly recommend having a stable profile so that it at least supports splashes of water and dust or sand, although there are models that can even be submerged and that they continue to work. There we will find many keys that will tell us about paper.

How to make an internal bluetooth module for a laptop?

It may be inconvenient for an active person to use an external bluetooth adapter. Some craftsmen offer to modify it with their own hands into an internal one by soldering the device to a USB connector. This option is suitable only for those who are close friends with a soldering iron and have experience in assembling and disassembling laptops.

Internal battery and speakerphone

There are four main ones. Resistance This is the resistance that the system opposes against the passage of current and should be as low as possible as this will be a good indication of the overall quality of the equipment. Channel Count and Driver Size In the world of speakers, although the number of channels is not a direct signal of the quality we will receive, they provide us with more options. Usually the point is that in the market we find 0 systems or here comes the size of the drivers, which are key when we talk about, for example, a subwoofer. In small sizes, there isn't much to offer good bass reproduction, and this is where we can find some important differences. It should be wide. ... Around 10 hours is the value we must demand from our portable equipment, and it should be borne in mind that this autonomy figure is usually quoted for using the speaker at 50% of its maximum volume.

Do-it-yourself work on improving the gadget is carried out in several stages:

If everything is done competently, then the device should work.

Can I make a wireless module myself?

Sometimes the question is: is it possible to make a transmitter with your own hands? This option is quite difficult to implement. You cannot assemble a microcircuit with your own hands at home, since it is very tiny, requires very delicate work, and the selection of the frequency range is carried out using integral solutions, while the protocol has been developed by specialists for years.

When evaluating your purchase of a speaker with an internal battery, keep in mind the charging time and system used by each equipment. To make sure the equipment you are purchasing is loud and it is much better if the microphones carry some kind of technology to reduce ambient noise.

With new standards, wireless transmission has been greatly improved in this type of connection between devices. Already for memory, there were times when the quality of the sound transmitted with this system was very low. Nowadays, you can enjoy quality sound in a huge number of speakers of all kinds, which will adapt as a glove to your needs.

Therefore, radio amateurs can only, using ready-made bluetooth transmitters, modify them at their discretion, adding the necessary elements to the finished circuit with their own hands. Some suggest improving the music speaker module or making wireless speakers, as well as adding a transmitter to the car audio system to avoid clutter of wires and download your favorite music directly from the Internet.

Minimum requirements for any type of wireless speaker

The wireless technology is designed in such a way that the sound source can be at some distance from the speaker. For this reason, a row of buttons built into the same speaker as volume, power on, pairing button or track control, etc. Will give the complex additional comfort, not allowing access to your smartphone, tablet or regardless of the sound source to make adjustments.

More than wireless connections

Having certain connections will bring you versatility and expand your usability. Before starting your search, it should be clear to you what use you will give the presenter. It does not have the same features and specifications as a speaker designed to stay stationary in your home, one designed to be worn all day.

The video below shows in detail how to do this. But in any case, such work with your hands requires good knowledge and skills in radio engineering, otherwise you can get a set of disparate radio components from one working bluetooth module and additional elements.

The first and most important is the battery. To enjoy hours of music entertainment, this will be the base battery that lives up to your expectations. The required minimum is approximately 8 hours of continuous playback, although some can reach as much as 15 hours of use.

In addition, it is important to review the battery charging time information as soon as it is used up, as some devices may have excessively long charging times. Another important feature that a speaker should have for your smartphone or tablet is that it is lightweight and compact.

DIY Bluetooth speaker? Yes, now I will tell you the easiest way to make Bluetooth equipment, which is quite popular nowadays, out of your old home acoustics.

Bluetooth speaker, how are things?

With the advent of Apple technology, I began to be quite interested in the technologies that are implemented in these devices, one of such technologies was AirPlay. The technology made it possible to stream audio and video to another device from your iPhone, iPad. The data was transmitted via Wi-Fi, which made it possible to maintain quality when transmitting over the air. But there was one problem, this problem with all Apple devices - the price. Such speakers were priced at $ 300 and more, which discouraged the desire to purchase such a device, because the size of the speaker itself was not large enough.

In addition to the functions already mentioned, it is essential to know the receiving range of the loudspeaker. He believes that the further the speaker is from the sound source, the lower the reception, and therefore the sound quality will be lost. Something very useful as they use the link already created between your smartphone and the speaker to conveniently answer your calls without turning off your music or taking your smartphone out of your pocket. When you receive a call, the player pause on your smartphone or tablet will be activated and the speaker will emit a beep.

Later I thought that I have speakers at home, why should I overpay for new ones? I only need a device that will receive the AirPlay signal. Having searched the Internet, I realized that AirPlay will not work, but it is possible to use Bluetooth and it will come out much cheaper. The first thing I did was go to Chinese online stores, where I searched. Since I often ordered products from AliExpress, this device was ordered from there.

When you end the conversation and end the conversation, you will play the music again at the exact spot where you left off before the call. This will give you more peace of mind when it comes to carrying your presenter, as it is inevitable when used outdoors, getting hit or hit a little, exposed to the humidity of a park lawn or the heat of a summer day.

Scalability is a very unusual feature among portable wireless speakers, but it's very useful in some cases, and you'll be glad your speaker has this feature. This, for example, will allow you to join your presenter with your friend and quickly create a 0 sound system that will dramatically improve sound quality, or you can expand your coverage to cover more area.

The device has no brand, name or any other designations, but when connected, it calls itself "BT310REV".

Appearance.

As you can see in the photo below, the device is quite compact and will not get in the way in the car. Due to the fact that the kit includes an adapter, you can immediately insert one end of the adapter into the car radio, and the other end into the Bluetooth receiver. You can do the same with columns. So much for your "DIY Bluetooth speaker". The receiver is made of soft-touch plastic in matte black color. This is an ideal option for this device, it is not noticeable, but at the same time it does not look disgusting.

Ideal for parties or impromptu gatherings. Enjoying a home theater sound system doesn't have to be accompanied by the tangle of cables scattered throughout the room. Power conditions are equivalent to any type of speaker and are subject to the usage that will be transferred to the device.

In general, the ideal is that they are capable of reproducing the entire spectrum of frequencies that a person can perceive. This range is 20 Hz for bass and 000 Hz for treble. That is, if a speaker is capable of covering the entire frequency range, it can reproduce sound with more nuance and more realistic sound. If this range is reduced at the bottom, the speaker will not be able to offer deep bass. If you do this from above, you will not appreciate the higher tones.

Sound.

The sound of this receiver is 3.5 out of 5. The Bluetooth version is old, because of this the transmission speed is lower than it could have been. Compared to the cable connection, the sound is quiet and noises are present, but if you turn on cheap speakers or simple "buzzer" in the car, I think you will not notice any difference.

In terms of sound power, this is directly related to the size of the speakers. For purely physical reasons, a 1.5 "speaker may not provide the same sound quality and power as a 5" speaker. Manufacturers are aware of these limitations, so they have developed portable devices capable of integrating up to 3 types of speakers or drivers that reproduce different frequency ranges and all in a compact size that you can carry in your pocket.

Even with size limitations, it is recommended that the selected speaker has a sound pressure of at least 80 dB. Also, always try to test your speakers before purchasing them. Very good speaker characteristics, after all, what really matters is that the type of sound you create pleases you, and since this is everyone's subjective perception, you will have the final say.

Device specifications:

Transmitter version: v3 + EDR, Class 2 (Support A2DP V1.2 (built in Mic).
Power supply: USB charging 5V DC.
Data transfer rate: 3 Mbps.
Transmission distance: up to 5 meters. Also catches behind a concrete wall.
There is a microphone.
Battery 220mAh. As stated, it is enough for 8 hours of work.
Works with all iOS and Android smartphones.

Contents of delivery:

Bluetooth transmitter
3.5mm stereo adapter
Micro USB charging cord
English user manual

Using a Bluetooth receiver.

First, connect the receiver to your speakers.
Press the only button on it. Hold this for 3-4 seconds, after which you will hear a woman's voice in the speakers in the speakers and the blue indicator will light up.
Turn on Bluetooth on your device and connect to the receiver. His name is "BT310REV".
Everything connected on iPav without problems, music played from any application of the system. The status bar also displayed the device's charge.

To turn off the receiver, hold down the button until the blue indicator goes out.

You can also use it to connect to your computer's speakers and wirelessly enjoy your favorite music without replacing it with new ones. Due to its size, you can take the mini disco to any corner of the world. From the beach to camping in any mountain range in the world.

Personal opinion on this device.

The device is definitely necessary and I really liked it. The appearance is attractive. The sound, though not perfect, is still better than it could have been. Do not think that now I am only praising the device. In fact, it is Chinese, with all that it implies. A large number of defects and, as you may have guessed, I also got a defective copy.

It has good sound quality. ... Let's first look at our selection and then see which is the winning horse. For under € 40, you have this small but intimidating speaker. It is the most compact, smaller than a cup of coffee, and with more than acceptable quality. It is true that when you set it to the max, its flaws appear, but at this price, you cannot ask for more.

The small speaker is ideal for connecting to a mobile phone or tablet. It lives up to the root for its price, but the audio output is overly fair as it is only 6W. Not much, but sufficient for a room or space without excessive external noise.

How it all happened: About 3 times I connected the receiver to different speakers and it worked, but the connection lasted no more than 5 minutes, everything was fine. I was just glad. But one evening I decided to check the device and connected it for a long time. He played for me for about 45 minutes and then the problems began. The signal began to be interrupted more and more often, music hiccups were heard. It feels like he simply did not have time to receive the signal, he was already receiving a new one and the previous one was missing. It lasted 2-3 minutes, at this time and tried to stop the music, the receiver played again for a couple of seconds, but again began to interrupt. Those 2-3 minutes passed and hell began, from the columns eerie squeaking mixed with ultrasound began. The Bluetooth receiver did not reboot, so I had to wait for the battery to run out. After being completely discharged, the device worked for a couple of minutes and did not turn on again when I tried to turn it on again. At the moment, it has not been restored.

Connections are located at the back and multifunction buttons on one side. The finish seems to be pretty good, but don't ask too much for the price.

Well, from now on they are more than words. At a higher price, of course, more, but a difference that you cannot make with the idea.

It has built-in two 6W speakers and a microphone to use in hand, although it is true that the latter has almost the entire list.

However, it is the best value for money as this brand is exceeded with every team that brings it to market. For you, the idea that more than 20 people are talking at a time cannot tickle this little invention, that if with a very large volume the bass starts to show its shortcomings, but we can ask for a little more Speaker of these measurements.

But despite this, DIY Bluetooth speaker ready, purchase devices of this type and use!

Any speakers can be used to make wireless acoustics, the signal to which is sent from a smartphone, tablet or computer using Bluetooth. This DIY project will require:

Any stereo speakers (for example, from an old music center).
- Amplifier with built-in Bluetooth module.
- Power Supply.

The amplifier can be purchased on AliExpress or another similar site. High-quality amplifiers cost from $ 10 and more, and there are models on sale that simply consist of a board, but there are cases in cases with buttons for pairing with a sound source, controlling volume and switching tracks. Models in cases are a little more expensive, but you do not have to cut out the case yourself and look for buttons that are suitable in size.

You will need to connect a power supply (usually 12 volts) to the amplifier, they are sold separately and are often found on Avito and other online flea markets. To drive powerful speakers, you need a power supply unit with a current of 2 or 3 amperes, and for small acoustics, 1 ampere or even less is enough.

Connect the speakers and power supply to the amplifier, press the pairing button and establish a wireless connection to the sound source. If everything is in order, a signal will sound indicating that it is time to turn on the music.

Recently, more and more often you can meet people who listen to music not with headphones, but thanks to the use of Bluetooth speakers. This portable device is a housing that contains a battery, along with speakers, and a receiver that receives a signal from the phone via Bluetooth.

Portable speakers have a pleasant sound and high volume, unfortunately, their purchase is often associated with significant financial costs. Consider how to make a bluetooth speaker with your own hands, while saving a decent amount of money.

Required components

Before starting production, you need to make sure that all the required elements are present at hand. These include:

An old speaker of a small size or a body and two speakers.

Bluetooth receiver that receives a signal from the phone and transmits the sound of the melody to the speakers. You can order this component in China or at an online store located nearby. These products are usually relatively inexpensive. The receiver is currently available for $ 6 including shipping.

Battery from an old phone. The larger the battery capacity, the longer the speaker will work without the need to connect to a charger.

Sound amplifier (from $ 0.50 on Aliexpress). The current example uses a Class D amplifier, model pam8403, 5V.

You will also need a working soldering iron, solder, sealant, or glue.

If all the required components are already on the table and ready to use, then you can start assembling the device.

Powerful bluetooth speaker with your own hands

The first stage of manufacturing is familiarity with the Bluetooth receiver circuit. To do this, you need to disassemble its body. Inside is:

antenna;
Bluetooth receiver;
memory;
charging controller;
two LEDs displaying the charge level and the process of replenishing the capacity;
sound amplifier;
capacitor;
power on / off toggle switch;
also on the board are soldered sockets for connecting a charger (Micro-USB) and connecting headphones or a speaker via a 3.5 mm jack.

There may be a small battery on the back, depending on the model of the receiver. It will need to be replaced with a more capacious one in order to increase the battery life of the column. This is the only tweak that will be required for a purchased receiver.

Capacious battery connection

Do-it-yourself battery replacement for Bluetooth speakers is carried out as follows:

The soldering iron heats up and two contacts (plus and minus) on the board are soldered with its sting. The procedure is to disconnect the low-capacity battery. Then it can be peeled off and removed or left in the case.

Two wires are soldered on the prepared battery (if it is removable). In the case of non-removable batteries, everything is simpler - there contacts immediately go from the case, so you don't have to solder anything.
Observing the polarity, solder the wires to the receiver board. The positive and negative polarity contacts are marked on the battery and receiver.

Check the work done by turning on the device. This should be indicated by the LED indicator.

Soldering the amplifier contacts

The next major step in creating a homemade portable speaker is soldering all the necessary pins to the amplifier. Let's analyze this procedure step by step in the context of the connected elements. So, to connect the amplifier to the receiver, you need to solder three wires from the mini-jack plug to it. This is done like this:

At this stage, the signal comes from the receiver to the amplifier, but does not pass further, since the wires from the two speakers are not connected to it. In the upper part of the board there is a mark "Out", and next to it are two sets of contacts (plus and minus). Diy do-it-yourself bluetooth speaker connection diagram is as follows:

From the speaker responsible for the left channel, there are two wires - plus and minus. They should be connected to the corresponding pins on the board (they are marked with an “L” mark). The channel for the speaker is freely selectable.
Also take two wires from the speaker that is selected to play the right channel and solder to the circuit. The place in this case is marked with the letter "R".

Now the speakers are connected to the amplifier and receiver, which means that the connection of all necessary contacts is almost complete. All that remains is to supply power to the amplifier: If everything is functioning properly, the components are assembled inside the speaker cabinet.

This completes the assembly. If you want to get a more accurate version, you will need:

Unplug the charging connector and switch.
Make them remote by soldering wires of the required length.
Make holes in the housing for the installation of the indicated elements.
Install with epoxy or other durable material.

In this case, all working elements will be hidden under the case, which will give the Bluetooth speaker an attractive appearance and similarity to the serial production model.

As a result, a homemade portable speaker will cost the owner $ 7-8, which is much less than the prices for the cheapest ready-made options offered by manufacturers. Before starting work, you will have to purchase the required items, so the process includes a little preparation. Of the tools, you only need a soldering iron and a certain amount of thin wires. Clearly following the instructions, assembling and soldering the contacts will not cause difficulties, in addition, all the connection points are marked on the boards.

Categories

Popular