Search for bluetooth audio in Topics


Hello, I am trying to make a device or find out if there exists a device that can be programmed to send audio,video,pictures or text for marketing and advertising purposes. Say i wanted to utilize Bluetooth 4.0 which shouldn't be necessarily open for it to receive all this data. How do i go about this. Any help would be appreciated

Question by chenane    |  last reply

Splitting Bluetooth Audio

Does anyone know how I might send 2 seperate pieces of audio to 2 separate actors via bluetooth headsets? ie to make 1 headset receive channel 1&2 and the other to receive audio channels 3&4. This should make for a great performance if I crack this... Thanks

Topic by Combover  

Is there a way to connect a bluetooth adapter to a bluetooth headset?

Usually, when you have a portable bluetooth adapter (containing a battery) you must turn it on & pair it with a smart device such as a phone or PC. Unfortunately, if your music output device is "dumb" such as a traditional MP3 player or even a turntable, there is no apparent method to get this device to pair with, say, a set of Bluetooth speakers or headphones. This is because neither of them have a display to enter a pairing code or to select which device to pair with. I'm assuming it's impossible to get two of these devices to communicate, but if anybody's figured anything out such as a wireless audio transmitter that uses traditional RF instead of Bluetooth, let me know! Thanks.

Question by noapparentfunction    |  last reply

help with bluetooth? Answered

Hi i need to connect my ipod dock to my  macbook pro via bluetooth all i need is a little device that can pug into a standard headphone socket and receive audio it will be fine if it only works on pc 

Question by techxpert    |  last reply

Bluetooth adapter for car audio

Dear all, I have a Skoda audio system integrated into my Skoda which has a cd reader plus a cd changer, but  only a CD button(no AUX available). I would like to stick inside the audio system a Bluetooth receiver so I can listen to music stored in my phone. The goal is to solder a Bluetooth receiver to the audio system without loosing the cd functionality. On top of that I would like to be able to change from one source to the other without having to use an external button like a 3PDT switch. Thanks in advance, Pedro

Topic by pcardoso73  

Arduino bluetooth audio controlled?

Hey i was wondering if an arduino could be controlled by bluetooth, but if you say something. Like using a bluetooth ear piece connected wirelessly to your arduino board and saying "on" to turn an LED on, and same with off. Is it possible or not? Also, does anyone know where i can find a good arduino bluetooth guide? Thanks alot!!

Question by Adum24    |  last reply

want to add built-in bluetooth audio receiver to an active Speaker

I like to add a bluetooth audio receiver to a Sonos Active speaker. I would like to build it inside the speaker so it looks nice too. I assume I have to get one of the Bluetooth Audio receiver boards like this . I think I should be able to find a 5volt connection somewhere in the Sonos speaker to power this unit and then have to hook it up to the AUX connection in parallel to get the audio going.  I was wondering if someone knows of a good bluetooth audio adapter that can pair multiple devices.  Also any other ideas or suggestions would be appreciated.  Thanks

Topic by nashmarkt    |  last reply

Can I solder together 2 3.5mm jacks to a bluetooth audio receiver? Answered

I have a StereoStream bluetooth audio receiver ($T2eC16N,!w0E9szN%28muuBRR5IUpUCg~~60_3.JPG) can I solder another 3.5mm jack with this one onto the circuit board and get audio out of both jacks?

Question by missing04link    |  last reply

Single Audio Input to dual input

Hi, I have an amplifier that only has one input, but I was hoping to have a bluetooth connection, as well as a 3.5mm audio jack. I was wondering if there was a way that I could do this? and that preferably it would switch automatically based on which is being used?

Topic by Fozzibehr    |  last reply

Building audio receiver for car?

Kindly bare with my stupid queries as i am new to all of this.   I searched different projects on this website but I couldn't figure the the connections properly.   I want to build a bluetooth audio receiver that can be used in the car.   I have an old bluetooth dongle that I used to get bluetooth connectivity on my desktop. Can it be used? If yes, then please describe the connections of the female 3.5mm jack with a diagram as I am a newbie.  Will the sound quality be good?

Question by AaravC    |  last reply

Changing bluetooth identification data

Hi I bought this bluetooth audio module from Now is it possible to change the bluetooth identification name, wch appears on the phone to pair, from what is mentioned. Thanks.

Topic by arjunmenon    |  last reply

Can an HC-05 Bluetooth module be used as an audio receiver? Answered

Of course there are specific BT audio receivers, but I like to save money.... 

Question by DangerousTim    |  last reply

What is a cheap bluetooth audio reciever?

I want to make a portable bluetooth speaker, but I cant seem to find the right bluetooth module. I don't want it to cost too much because I'll probably end up taking it apart, and it has to have low voltage requirements to operate off of lipo batteries. Any help here?

Question by qquuiinn    |  last reply

Bluetooth TV audio for Disabled Vet

I am a disabled vet having suffered hearing loss in Iraq (amongst other things). I wear hearing aids and was given a device by the VA that I wear around my neck.  It is a bluetooth device that pairs my iPhone to my hearing aids.  A different device I was given plugged into my TV and sent an audio signal to a set of headphones.  The idea is so that I could turn up my volume w/out affecting everyone elses. BUT... I never got it to work, AND it's been lost since I moved. SO, I was hoping the community could help me figure out a way to incorporate the bluetooth idea but instead of from my phone to my hearing aids, I'd like to go from my TV to my hearing aids.

Topic by ValleyWalker    |  last reply

Is it possible to use a old mobile as a bluetooth audio receiver?

I have seen several tutorials outlining use of old mobile as an mp3 player especially hook it up with an car audio player (via aux in port). I have a sony ericsson w700i walkman cell phone lying with me. I already am using it as an mp3 player in the car. I wanted to know if i can extend its use further and pair it with my new mobile to play music wireless. If it's possible it might well be used for making receiving calls via car audio too. I know there are several cheap stereo bluetooth receivers out there which can be used for the same purpose but I am interested in knowing if an old mobile can be used for this purpose somehow or not.

Question by rouheet    |  last reply

Transmit & receive 4ch audio

I am looking for a cheap solution to transmit and receive 4 channels of audio.Transmitter may be bulky, but the receiver must be small. (it is for an interactive installation)Audio The 4 channels will be converted to 2 channels stereo, so in total 2 stereo signals of audio need to be transmitted and received (within ~10 meters). Note that achieving the best audio quality is not of top priority.Technique Should I be looking at FM / AM of Bluetooth methods? I've looked at:, but it would be nice if there is also a paired receiver board.It would be nice if the proposed solution is scalable to 6 channels (3 channels stereo).

Question by LudoP4  

bluetooth 4 transmitter to headphone latency reduction

Hey everyone! i'm seeking some advice about a system i've been trying to work out - a bluetooth audio headset from a PA system for vocal monitoring during band rehearsals. currently i'm running microphone -> PA -> bluetooth 4.0 AD2P compatible audio transmitter -> powerbeats bluetooth 4.2 headphones the connection is working fine, the only issue is latency between microphone and headphones (approximately half a second), which makes it very difficult to use as a monitor as i require very minimal latency to hear my voice in synchronisation with the rest of the band. a few questions; does bluetooth simply have an unavoidable lag due to data compression? is it possible for me to hack the bluetooth transmitter in some way to increase the rate of compression/transmission? what would you recommend as a cheap substitute in the event that nothing can be done? thanks very in much in advance, Austin

Topic by totemgoat  

How to use Bluetooth Module - HC-05 Device as audio receiver?

I want to connect Bluetooth Module - HC-05 (or HC-06) to my home theater to receive stereo audio signal from laptop. please give me the full guidelines.

Question by smandal13    |  last reply

Send audio with arduino through bluetooth to an IOS and save it in the App.

I have an arduino board and I need to capture audio with a mic, send it through bluetooth BLE and receive it in an IOS App to save it in the iphone or Ipad.

Topic by FreddyA17  

Best way to transmit audio in real time without latency

Hi, I'm working on a project with esp 32 and I would like to know what is the best way to transmit audio (streaming) in real time without latency. Reading, I think the best option is Bluetooth with APTX, but I would like to know if there are modules to do this better than with bluetooth. Thanks you.

Question by RicardoC233  

Connect two audio amplifier ?

Hi, I would like to make a very powerful 80w bluetooth speaker, but the only great audio amplifier that I found has only two output for speakers. So I was wondering if it will be possible to buy two and connect the first audio amplifier to the second one ?  Cheers, PS : here is the audio amplifier and the speakers that I will use :

Question by EgeK2    |  last reply

How to connect 2 audio sources to one speaker?

Hello, I'd really appreicate if someone could help me out here. I have a Samsung Bluetooth Car Kit which outputs the sound though a seperate speaker. What i'm looking to do is connect it in some way to the cars owm drivers door speaker. The Head unit mutes automatically when a call comes so there would be no sound going to the speaker from it when a call was in progress. The simple way to do it in my eyes would be to just connect both sets of speaker wires to the one door speaker, but i'm concerned that the 50w RMS that the head unit can blast out would be feed back into the bluetooth control unit would in some way damage it, and vice versa when I was talking on the phone. What could I use to prevent the sound getting feed back, some type of diode or something? Like I said any help would be really appreicated as the speaker is a big ugly thing which I'd rather not use if possible. Thanks Davy

Question by mysticalvibes    |  last reply

XS3868 Pin 7 Charge pin?

Hi. I have a XS3868 Bluetooth Audio Module. I found that pin 7 (7th pin on left) is being labelled as Charge. But in some other image,it is labelled as LED. Is it a pin that can light up an led if the battery powering it is getting low? Anyone with experience with XS3868 please tell me...

Topic by 5Volts  

What are the best bluetooth speakers for a mac laptop?

I am looking to buy a speaker(s) for my laptop.  I would like to buy ones that are bluetooth capable and preferably do not have a chord that you must plug in to keep it turned on.  Thus being battery operated (if applicable).  I would like to spend under $100, but if that is not possible then so be it.  

Question by hockeyros07  

Boombox Bluetooth mods

I have a JVC RV-NB1 Kaboom Series Boombox and want to mod it with a "Decoder Board USB/TF/ Reader IR Remote Bluetooth/FM Audio Board Module MP3". "Bluetoothing" this box is easy but installing this module involves a bit more ie. usb, TF slot, aux, FM. IR for remote any ideas as to connecting the rest. I can't seem to find a schematic from JVC. It has an FM tuner and can decode mp3,WAV,CDA,FLAC. CD's.Plus I want to add either a LiPo 4200mAh battery or a transformer for charging the module.any ideas would be greatly appreciated. Chuck Reed

Topic by CR34  

What audio potentiometer to use?

I am building small Bluetooth speakers for Christmas presents. I am using a 5v 2*3w Bluetooth Amplifier with a PAM8403 chip. I am wanting to add a dual potentiometer to control the output of the speaker, not the power going into the amplifier. I am going to use a logarithmic potentiometer but I cannot figure out the resistance I am needing. I have found A5k and A10k resistors, would these work for the project? Is there an equation or guide that would help me out?

Question by MitchellD30    |  last reply

How can you transmit audio using a Bluetooth Dongle?

Hey Everyone,I'm just a beginner with Arduino and what I'm trying to do is take an incoming audio signal and then transmitted through a Bluetooth dongle. I am using a USB Host shield that is connected to a Sennheiser BTD 800 USB Bluetooth Network Card. I've currently just been messing about with this SPP sketch from the USB Host shield library 2.0. What I'm wanting to do is to display the incoming audio signal in the plotter window. Pictures of the sketch are down below. If anyone has any ideas on how to program it to do this, it would be much appreciated.

Question by MCsugar43  

A Homemade Bluetooth Speaker using an extra car speaker?

Okay fellow instructables friends, here's the deal.  1) I don't really want to pay $50 for a bluetooth speaker.  2) I ended up with an extra 5 1/4" speaker due to one being dysfunctional out of the box and the company sending me replacements.  3) I've got a basic background in electronics projects, but am by no means an expert.  That's the gist of it. I've seen some bluetooth/FM/USB modules on DealExtreme that looked worth getting (around $14), but I'm not so sure of the Audio amplifier circuitry and whatnot. I figure I can figure out an enclosure and whatnot, but does anyone have any expertise/knowledge about the mixer and amplifier stuff? Can they be salvaged from other thrift store finds perchance? Look forward to the answers! Thanks!

Question by rogueleadr    |  last reply

How to hack Bluetooth Dongle to work with a headset = Bluetooth headset.

Hello, I need help, I have a Bluetooth audio dongle the kind that you plug into a USB port of a speaker to transform it into a Bluetooth speaker. But I was wondering if I can use it with a regular headset/headphones and a regular cellphone battery for power supply,. THank you

Topic by Toyanster  

Help: First project - Bluetooth HUD/Router (i don't know what it would classify as)

OK Here's what i'm trying to make you guys. Essentially id like to make a device that will connect to a smart device via Bluetooth and also can connect and transmit to up to 5 Bluetooth speakers (of any brand). i know some Bluetooth speakers now have duo casting or whatever its called but i would like to go a step further. honestly i have no idea where to start, currently what im thinking is using some model of raspberry pi as the backbone of this unit. i would imagine id have to wire 5 bluetooth transmitters and one bluetooth receiver to the pi but i have no idea how i would program the pi or wire it up. as said before this will be my first project so i am rather new to this whole concept of diy but i love the idea of making my own gadgets. i want the pi to recieve bluetooth audio from a smart device and then redirect the audio to the 1-5 other bluetoooth speakers that could be connected to it. i also think it would be really cool to 3D print a body for the pi unit that can house a decent sized rechargeable lithium ion battery, that could be recharged via micro usb or maybe type C. Another cool feature i thought of was if i could wire 6 usb ports to the rechargable battery that could be used to charge 5 bluetooth speakers and you phone in one go. i also suppose id need to put some kind of screen on the pi unit and program some kind of user interface so i could make pairing to the bluetooth speakers and smart devices easier. all in all i guess what im going for is a power bank with the ability to redirect bluetooth audio from a smartphone to multiple bluetooth speakers. is there anyone out there that could maybe help and suggest how to make such a device? constructive critism is welcome as are any ideas for extra features. also maybe point me in the right direction as to where i could purchase the parts for this?Parts i know i'll need5 bluetooth transmitters1 bluetooth receiver6 usb ports1 micro or type C port1 rechargeable lithium ion battery (preferably at least 10000 mah or more, more is always better)

Question by ZeroMonarch    |  last reply

Bluetooth Transceiver for headsets with a mic

Hello Everyone, I would like to build a module that is a Bluetooth transceiver that I can connect to a two-way radio. I have seen many transmitters for Bluetooth but they don't have the correct connection. I need a Mic/audio/Ground type. Can someone here point me in the correct direction. Thanks Hobs

Topic by PilotHobs    |  last reply

Ways to accept bluetooth, USB, Airplay audio inputs to an Amplifier

Hi Please don't shoot me for asking this. I am getting confused. I am building an amp using TA2020, with guidance from datasheet. The input pins accept analog sources. I would like to know how to add Bluetooth, USB, Airplay input support to the amp, since their output is digital (if i am correct). Simply by adding different modules, would it suffice? Now also, where does I2S, DSP fit in. Thanks

Topic by arjunmenon    |  last reply

Can I use single 24vDC power source to feed two 24v audio amp boards?

I have a audio amp board with no bluetooth so i want to add a bluetooth audio amp board to it all on 24vDC power supply but one board just blips on and off. Thus making a popping sound. Ive tested on separate power sources and seeems fine. Am I wiring wrong?

Question by Msala87    |  last reply


Looking for some help with a mod.   I need the guts of a bluetooth receiver or headphones(just the bluetooth module) installed into the housing of a hearing aid.  Basically just the receiving module I dont need to talk on it, it is just for audio.  I don't need or want the hearing aid parts to work or anything else inside it other then the bluetooth receiver.  obviously I need the audio from the bluetooth to come out of it though. I just need it to be rechargeable.  I will provide all the materials.   That's all I am looking for and am willing to pay for the time.

Topic by smiegel    |  last reply

XS-3868 bluetooth module, pairing password?

Hi, was thinking buying this blittle board in the future, but I can see in description that it has a pairing password, (which is 0000). I did not like this option, its any way to remove it? this gave me problems because I need something wont ask for a password, which is not good for audio devices. This is the item. Is there any other option as good as this because that does not ask for any password? Thanks so much.

Question by destrip    |  last reply

removing power supply noise from my bluetooth speaker

Hello guys, so i made this bluetooth speaker and when i hook everything up and runing i get this weird noise from it im pretty sure it has something to do with the voltage step up but im not sure how to remove the noise would be great if you could help :)  yeah yeah i know the schematic is pretty epic, lets pretend that the two amp audio input and bluetooth dongle audio output are connected, and ignore the fact that there are no switches and stuff like that pretty sure thats not hwat causing the noise.   i know that theres a way to remove noise by using capacitors but i dont really know how to use them. thanks for tips :)

Topic by VytasŽ    |  last reply

Raspberry Pi and android surround sound Answered

Hello, I was wondering if it is possible to use a Raspberry Pi as a bluetooth surround sound transmitter, and multiple androids as a bluetooth speaker? Is there a plugin card for the Raspberry Pi that can transmit to multiple bluetooth devices at once if the device can handle splitting the audio in the first place? Thanks for any help

Question by jbaker22    |  last reply

How to program the XS3868 bluetooth audio module through arduino?

Hello, I have a few of these xs3868 bluetooth audio modules that I used in some speaker systems I built for myself, but now one of my friends wants me to build him a custom speaker with a custom bluetooth device name and passcode. So I thought, ok, I read a little about programming with the AT commands but never tried it before, so I hooked up a board to 3.3 and gnd of the arduino like I usually do to check before soldering everything, my phone connected with no problem. So next I turned off my phone's bluetooth so it wouldn't mess with the chip while programming it and connected the rx and tx pins of the board to tx and rx respectively. I also made the following adjustments in the arduino serial interface that I remember reading somewhere: No Line Ending, and 9600 baud rate. Plugged in in to the tx and rx of the arduino board with at mega chip removed and had no luck getting any response from the chip, I switched baud rate to all of the different baud rates available with no success, the only effect the chip has on the serial interface is that when the power cord slipped and I plugged in back in with rx, tx and the usb cable still connected it output a few seemingly random characters while (I'm assuming) the chip was booting up, at 115200 baud rate the characters were a "u" with two dots over it and a combination lowercase "b" and "p" (for some reason I can't copy/paste it). It only outputs these characters when one of the power wires is reconnected after being disconnected (I have a bunch of these so if I fry one it's no big deal). I tried connecting my phone again after a while and it worked, checked the wires with my multimeter and both are connected and neither is shorted to any other pins and switching rx/tx does nothing to fix the problem either. I have a usb to serial coming in the mail soon hopefully but my friend was hoping this could be finished sooner than it would arrive so any help would be greatly appreciated. Edit: Is it possible that the module could have a rs232 interface, rather than a ttl interface? I've heard that arduino only uses ttl and that I'd need another adapter to get to rs232 since my computer doesn't have that kind of serial interface.

Question by LazyH    |  last reply

Using headphones for listening to tv.?

My panasonic tv does not have bluetooth. I have new Marley headphones. Theywork well but not when the channel says Dolby or no good with Netflix as they appear to all transmit in Dolby. I purchased both a digital to analogue converter and bluetooth transmitter as advised but still cannot get Netflix audio or those channels using Dolby. Is it because bluetooth will not transmit analogue??

Question by BarryN16    |  last reply

'02 Prius: Create AUX audio input

My Prius is still cruising along fine. But, I tire of messing around with FM transmitters to get my audio into the radio/audio system. I purchased mine with a 6 CD changer, so I know there's a way to add audio in. [The changer died after 2.5 years: Toyota said $300 to send it off to CA and get someone else's refurbished device back. No thanks.]I see all the newer cars with an AUX audio input jack. I'd like to put in such and/or a Bluetooth input.I went to a local car audio store and they said $450 to add it in. Bleah!Anyone done this or know how? [This is the original body style, not the newer, fastback style.]

Question by GanadoRH    |  last reply

Upcycling speakers

Hi all! I came across an old aluminium briefcase (the kind you'd transport a million dollars in if you were a spy), and I was thinking of converting it into a battery-powered multimedia platform. Details aside, the first milestone would be to make it into a glorified bluetooth speaker. Now both as concerns for the environment and my own wallet, I plan on reclaiming components when I feasibly can. Bookshelf speakers (with no amp) tend to go for really cheap in second-hand stores where I am, so that's my starting point. The plan is to open up a pair of speakers and attach them to the case somehow, with a wired power source and eBay amplifier circuit to begin with.So my question is, what's it like re-using bookshelf speakers? I know there's a lot of projects online converting them to battery power, but what if I open them up and take out the actual speaker inside? Are there any issues, or much loss of sound quality when the wooden case is discarded? I'm no audiophile here, even a fuzzy sound is okay as long as it has a bit of bass to it. If I use it a lot and I really have the chance, I'll buy a proper pair of speakers to replace the older ones (and maybe consider proper audio engineering where I route frequency ranges to different woofers etc). But that's not happening right now!If anyone has experience with this kind of project, any advice is appreciated :)And if anyone's curious, I was planning on bolting the speakers directly onto the front of the case (which is solid plastic), allowing it to be used closed or open. Then add Bluetooth support and eventually a Raspberry Pi with a HiFiBerry card, then with cool mini MIDI controllers the sky's the limit.

Question by rathdrummer    |  last reply

Connecting a Sony XB-3 Bluetooth speaker to car stereo?

Hi, first time asking a question here! My gf's birthday is coming up and I wanted to get her something to improve the sound on the stock stereo in her beloved Mistubishi Lancer. I can get an amazing deal on a Sony Extra-Bass Bluetooth speaker, which I imagine SHOULD do the job. But before I go ahead and buy it, I've been trying to  deduce whether or not it would work. The stereo itself in the car does have Bluetooth capabilities, but I cant find any info online regarding the connection of BT speakers to a car stereo system. Anybody know if this would work, ore have suggestions for a better idea? I'm first to admit that I know nothing about car audio connection/installation etc, so ANY help is appreciated! Thanks a lot in advance guys and gals

Question by CollinH14    |  last reply

DIY Bluetooth speaker build, advice please

Hi all Apologies for the newbie questions, I've decided to build my first portable speaker system. I was hoping to make my own version of the 'Vintage Audio Suitcase Speaker' e.g. I have found some second hand 6.5 inch 'Response' woofers for a cheap price and I have two spare satellite speakers from my Logitech Z-5500 system. Suitcase should be relatively easy to source. What I'm struggling with is the amp and battery choice. I'd like this to be able to run for a few hours on battery, and be easy to recharge via mains or USB. I don't mind spending a bit of money on the amp as I'd like this to last a good few years. The tricky part is, with my current speaker plan, it would need to run 4 speakers that are rated at 70wrms each. Plus the Logitechs are 8 ohm and the Response woofers are 4 ohm. Is this possible? Advice much appreciated.

Topic by SpookyGhost  

Trying to create my own car head unit.. Sorta.

So i enjoy electronics, so i thought of an idea that would really benefit my life. I enjoy listening to music in the car. Like really enjoy it. Currently i have the original head unit that came with the ford focus mk1. Its terrible, and the speakers distort at loud volumes. Plus there is no way currently for me to listen to my own music apart from a CD. Which come on.. no one uses anymore.So here's my idea that im finding difficult to bring to light. I was hoping i could create some sort of botch head unit. But i want to create this using components that are not end products. So no i do not want a £100+ amp that does this for me without the DIY. It should be a lot cheaper to do this DIY.So my idea was 1 amplifier circuit board, which is difficult to find to power 4, 4 Ohm speakers. So my idea was to have 4 separate amplifiers for each speaker. I can't find a single channel amplifier to power a 4 Ohm speaker however. The signal the amplifiers would receive would be through an auxiliary cable or bluetooth reciever.Any ideas to point me in the right direction would be awesome. If there's a loophole in my idea then please let me know. Still a lot to learn, but that's what were here for right.Thanks in advance.

Topic by BrandonC211    |  last reply

How to identify power required by speakers? Answered

I'm trying to adapt a pair of headphones to a bluetooth module for a wireless headset. I'm using a common module found here.;=STRK%3AMEBIDX%3AIT  Spec sheet says "Stereo audio output can directly drive 40mW @ 32Ωspeeker without the need for DC-blocking capacitor" I have some old sony headphones with a microphone i would love to use but i cant identify how many watts and or ohms the speakers will need. I wont need the microphone, but if i can get it working it would be cool too. I've identified the headphones model as PSP-270X but i cant find a spec sheet that includes the type of speakers included. So i took apart the headphones but the only markings they have on the speakers are ATZ2261, And a couple google searches came up empty. Is there a way i could test these headphones?

Question by Tomahawk92    |  last reply

50W amp 60W speakers? Answered

Ive got a 50w dual output Bluetooth only amp, I've also got Two 60w speakers would putting the max volume into the speakers damage them if played for a while. The speakers are 4" and slightly distort at max , could be from slight under power , the amp is rated at 8v to 24v and I am using a 19 v 3.16 amp laptop power supply Speakers 8ohm 60w  Amp dual output Bluetooth only 50w x2 Amp power 8v to 24v

Question by bonze77    |  last reply

How to power servo without driver/arduino?

Hi, I'm trying to make a servo motor spin without using a driver or micro controller, I just want to power it directly. It doesn't need to move a specific distance, or be precise. How would I wire this up? The idea is to power it on by using a HC-05 Bluetooth module, either directly, or by optocoupler. It would have to trigger the servo on whenever a Bluetooth device that has already been paired connects to the HC-05 module (in wireless range), and then off when a Bluetooth device disconnects (out of range). My idea is to use an app that automatically plays an audio file through the HC-06 when it connects (this app already exists), and that audio file happens to be the correct frequency to act as a PWM signal. Is this even possible?

Question by dmagryta124    |  last reply

Adding headphone jack to stereo bluetooth headset - Confused by wiring

I have a stereo bluetooth headset which has a right channel earbud connected to the mic part and a detachable left channel earbud. I opened it up and found a green and copper colored coated wire going to the right earbud then another set of green and coppor coloerd wires going to the plug in for the left earbud. Using a left/right audio testing program on my phone I tried wiring the wires up to a set of headphones to test which wire is which. When I wire up the green right wire to the right channel and the copper colored wire to the ground I get sound through just the right channel as I would expect. When I add the green wire from the left channel to te left connection on the headphones both channels play through both sides of my headphones. When I did those tests I was assuming the copper colored wire was a ground. I then reversed the colors assuming the green wire was the ground and repeated the same test with the same results. No matter what combination I connect the wires in I cannot isolate the left channel to the left side and the right channel to the right side. Anyone have any ideas?

Topic by xxxjdoggxxx    |  last reply

Finding speaker specs based on case design

I know there are a handful of Thiel/Small calculators to build a box, but what I am looking for is a way to find which speaker specs would fit into a particular dimension of a design. What is that ONE thing that really determines the size of the casing. Is it Vas, Qts or something else. So for example, I want to build a small portable bluetooth stereo speaker with dimensions of length - 6inch, height-3inch, depth-2inch. So if I am looking at speaker datasheets(suppose full range), can I get a rough idea that I can use it in such a type of casing. Mind you there would be two of those speakers. And as a sidenote, what about if there are tweeters, woofers, etc.

Topic by arjunmenon    |  last reply