EEWORLD DIY—【Share DIY】Bluetooth Speaker

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EEWORLD DIY—【Share DIY】Bluetooth Speaker [Copy link]

EEWORLD DIY—【Share DIY】Bluetooth Speaker

DIY&Share

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I like to do it myself, love DIY, and share DIY. Bluetooth speaker = Bluetooth + speaker, isn't it that simple? Most of the mini Bluetooth speakers on the market currently have one speaker, and the effect is not that good. So would it be better to make two speakers? So today's protagonist is a small speaker that I disassembled in the previous post: 《#以拆会友#-Disassembling a portable small speaker》 and the Bluetooth module in a Bluetooth headset.

P01 DIY Protagonist

I. Preparation 1. Rendering The DIY Bluetooth speaker this time mainly adds the Bluetooth module to the inside of the speaker. The power supply of the Bluetooth module uses the lithium battery inside the speaker. The audio output of the Bluetooth module is connected to the audio input of the speaker. Then the Bluetooth module can work when the speaker is turned on. It can be used as a Bluetooth speaker by connecting the Bluetooth of a mobile phone or computer.

P02 Finished product renderings

2. Preparation of main materials 1. Portable small speaker*1 2. Bluetooth module*1 3. Wire tools, etc.

P03 DIY protagonist

II. Design principle 1. Principle From the perspective of DIY, the principle is actually quite simple. As long as the audio signal received by the Bluetooth module is sent to the audio input end of the portable speaker for amplification and then output through the speaker. The power supply of the Bluetooth module and the speaker amplifier module is directly powered by its internal lithium battery.

P04 Principle diagram

III. DIY process sharing The Bluetooth module is the circuit board inside the Bluetooth headset. Remove the original battery, microphone and earplugs:

P05 Front of the Bluetooth module

Short-circuit the original button position with solder, so that it can be turned on directly when powered on, and there is no need to control the Bluetooth module separately through buttons:

P06 Short-circuit the power button

Looking at the silk screen on the surface of the IC, you can see that this module uses the Bluetooth chip of Webstar Technology:

P07 Bluetooth chip

Remove the panel of the speaker:

P08 Remove the speaker panel

You can see the volume potentiometer, two speakers, battery and input port inside the speaker:

P09 Inside the speaker

The multi-function digital circuit board on the side of the speaker can be used with USB and SD cards:

P10 Digital control board

The digital control board main chip and peripheral circuits:

P11 Digital control board main chip

There is corresponding English silk screen on the signal line above the digital control board:

P12 Control board signal line

Solder the power supply and audio signal output lines of the Bluetooth module:

P13 Connecting wires

P14 Front

P15 Back

Connect the power and signal lines of the Bluetooth module and the speaker:

P16 Connecting wires

Soldering completed:

P17 Soldering wires

Use high temperature tape for insulation:

P18 Wrap the CNC board

Use high temperature tape to insulate the Bluetooth module:

P19 Wrap the Bluetooth module

P20 Continue wrapping

P21 Wrap on the back

Fix the module:

P22 Fixed position

Power on and test the startup effect:

P23 Power on

The test passed perfectly:

P24 Test

DIY is finished, you can install it back and enjoy Bluetooth music:

P25 Perfect Ending

IV. Video Show After DIY is completed, here is a video effect test: (http://v.youku.com/v_show/id_XMz ... j.8428770.3416059.1)

V01 Video effect display

V. Conclusion The effect of DIY this time is ideal. After the speaker is powered on, the Bluetooth module also works at the same time. The mobile phone Bluetooth can be connected to the Bluetooth module to play music. The audio signal can be transmitted without distortion or interruption at a distance of about 10M, and the playback effect is also very good.

END

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Share-DIY

--I don’t understand

2017/12

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This content is created by EEWORLD forum user I don’t understand. If you need to reprint or use it for commercial purposes, you must obtain the author’s consent and indicate the source