Inexpensive Bluetooth Speaker Kit (

[@bittertruth6575]

Thank you very much Martyn. A perfect walkthrough for my kids to follow. Just received delivery of 2 of them along with 2 diy line following robots. Still waiting for a diy radio kit that I ordered as well.

[@adventuressdcafansub7249]

How was it

[@StevePotter]

I read on one of the vendors' stores that the 470uF caps go in series with the speakers, to improve the bass response. Mind the polarity.

[@urbansnipe]

Series or parallel? Series wouldnt work would it? Also what does the potentiometer do?

[@StevePotter]

The trim pot adjusts the threshold of clocking the LEDs. Yes, series works for the caps to speakers.

[@richardjones7984]

@@StevePotter Won't that filter out the higher frequencies?

[@easyazpie9091]

I have the exact same kit...they never sent a instruction manual! argggh

[@VoaxIcyy]

Thank you for making this I had no clue how to make this and then I found this video, such a lifesaver

[@JessicaFEREM]

If you just want a MP3 player with a built in speaker, the Retekess V115 is really quite decent. has a micro SD card. plus it's a radio so if you want to listen to the radio it gets pretty good reception. but you can also use a USB cable or line in for audio as well.

[@gartmorn]

I built a wired speaker kit from banggood and incorporated a bt unit into it. I also found I had to run it from a plug in supply as it was drawing to much current for a smaller power brick!

[@MartynDavies]

The big brick at the end of the video can source 1.5A, so this is plenty.

[@englishrupe01]

That was great fun....thanks, Martyn! I have several different types of these Chinese BT MP3 players now that i build up from incredibly cheap parts and plastic tubes into great sounding players. Thanks!

[@MartynDavies]

The modules themselves are so compact that all kinds of builds are possible.

[@lexbroken8101]

Thank you, Sir.

[@romanieo]

Great vid. Cheers from the US. Liked and Subscribed.

[@KrisCochrane]

Nice one pal - good to see you back!

[@MartynDavies]

Thanks Kris!

[@byJASSY]

For some reason my LEDS don’t work at all and I didn’t get a spare capacitor in the box either

[@MartynDavies]

I would check that the 4017 chip is getting power - pins 8, 16 on that chip. If it is powered there should be one LED on.

[@victorlte]

Thanks Martyn for the video. In my bluetooth kit the are two leds doesnt work,(dont light on) but I desolders and check is ok. These leds are marked in the main with D4 and D6. Do you konw why this happend?. Thanks

[@MartynDavies]

I would probably check the corresponding pins of the 4017 to make sure that it's not shorted, and can provide a high output.

[@victorlte]

@@MartynDavies ok thanks, already is fixed. Now works properly

[@victorcabalmunoz7178]

A mi me llego todo apretado en una bolsa. Y sobran 2 diodos y un condensador de 470 uf que no aparece en el esquema.

[@adventuressdcafansub7249]

Por donde lo compraste

[@RebornSWEDEN]

Hi, thanks for your video. I have everything ready now and everything seems to work fine except for one detail, the sound is so low that you can't hear any sound even at the highest volume. I also felt that the white panel is a bit warm. I don't know why but I got a pair of capacitors 470uF 16V in the package. The capacitor solution do not work for me. What could be the cause?

[@MartynDavies]

I would visually inspect the bluetooth/amp board and make sure there are no shorted wires/solder splashes and so on that might be affecting the amplifier. I haven't looked in detail at this board, but I suppose that one of the 3 chips is a class D amplifier chip, so I would look around this one for potential problems.

[@Tatasik]

24:37 Конденсаторы 470 uF это фильтры на динамики, ставятся в разрыв цепи хоть "-", хоть "+" контакта.

[@jesslex918]

where exactly?.can you.point it on the diagram?

[@Tatasik]

@@jesslex918 загуглите "акустический фильтр высокой частоты из конденсатора".

[@BrFishWPB]

I got and built this last week and it worked great for a couple of day, but nownthe BT does not show up anymore :^(

[@MartynDavies]

As far as I know, it listens for pairing for a short time after power-on. I'm not sure that there is any way to force the player to rescan other than power-off/on. You can try doing "forget device" on your phone/tablet, switch to airplane mode and back on again, then you can be sure that it will scan and try to attach anew.

[@BrFishWPB]

@MartynDavies I tried forget the device, and now the YMxx is not advertised anymore, lol. Checked with 2 phones

[@MartynDavies]

Yes that does sound busted

[@jimmyross1672]

hey so yeah i want to buy this for my brother but i cant afford it wright now lol but yeah thanks for making this video so i know if i should get this or not lol so god bless and keep on keepin on ill see you in the next video also im a new subscriber

[@jimmyross1672]

so yeah just wanted to say this cost me 20 dollars in US witch isnt bad but i rather pay around 12 dollars for something like this lol but yeah i really want to buy this for my brother but i want to put it togeather since thats what i like doing but i dont care about music and he does so it would be good for both of us lol i can build it and he can use it lol well once he gets out of prison that is lol but yeah hill be home in like 2 years lol not to long from now lol and yes i been to prison as well lol its easy now adays lol

[@MartynDavies]

International shipping prices out of China seem to have increased quite a bit in the last year; I'm not sure why this is.