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    • #11050
      mullins
      Member

      Hey guys. Just signed Up and brand new to audio diy. Liked quality audio for years and wood work so combining the two to do speakers and enclosures for diy amps. Looking to add on to 123toids $300 amp video by combining a khadas tone board and Bluetooth module. I’m going to need lotsa help so I’m looking forward to this forum👍🏼👍🏼

    • #11053
      123toid
      Keymaster

      Hello. It’s awesome to have you!  So far I’m loving the sound of the project. That sounds like a top-notch project. We look forward to helping in any way we can and following the build along the way 


    • #11054
      mullins
      Member

      @123toid thank you! So as the newb here’s where I’m at. I want everything in one box. That said I don’t want cables connecting everything in there if possible. So to start…can I take a Bluetooth receiver board and the khadas tone board, unsolder the rca’s from each and hard wire the Bluetooth out to the tone board spidf in? I’ll then have to unsolder the rca outs from the tone board and 123toids amp in’s and hard wire those together. Am I remotely close?

    • #11085
      mullins
      Member

      Nobody? I have an ASC and an AC sitting here and a Khadas tone board and Shure Bluetooth 5.0 board en route. Thanks

    • #11086
      123toid
      Keymaster

      @mullins

      Sweet!  THis will be a killer build!  Can you draw a diagram of exactly what you want to do.  It sounds doable, and I think you are on the right track, but I don’t want to say for sure.


    • #11100
      mullins
      Member

      @123toid ok thanks. I’ll do that when the Bluetooth and tone board get here.

    • #11101
      tvor-ceasar
      Moderator

      Sorry, been busy trying to help out a guy on another board I belong to, it requires some protoboard stuff along with old style home manufacturing of parts just to do proof of concept due to not having all the necessary parts. That and work / family holiday / taxes, well, you get the idea.

      I’m not sure what the minimum # of posts are required before you can post links, so I’ll see what I can do with the schematics on line. In the meantime, what are the model numbers?

      Might take a day or so before I can get to it, so please be patient with me. I look forward to hearing more from you and Nick.

       


    • #11260
      mullins
      Member

      Ok so tone board finally arrived! Here’s the goods. Now step 1. Do I unsolder the left and right channel rca outs on the Bluetooth board and hard solder direct to the tone board spidf in? If so, what gauge? Thanks

       

    • #11333
      mullins
      Member

      Anybody? If not I can try another forum maybe more geared towards noobs. Thanks

    • #11334
      tvor-ceasar
      Moderator

      Need a little more direction and description of what you are actually trying to accomplish.

      Are you trying to use just 1 set of inputs for the amp by trying to combine both the Bluetooth and the Toneboard  into 1? I think that is your idea. Please confirm.

      As far as putting the output of the Bluetooth into the S/PDIF, they are 2 completely different formats. The Bluetooth is analog while the S/PDIF is a digital stream. It would almost be better to tie the 2 sets of RCA outputs together. But that “could” have consequences.

      At the moment, I don’t have the amp input scheme in front of me, so it will take a bit more time to figure out. I’m still working, so my time is limited.

      I also see you’ve got 6 posts so far. You “may” be able to post links. Give it a try. If it doesn’t work, then 10 might be the magic number.


    • #11336
      tvor-ceasar
      Moderator

      Really, what I am trying to get from you is the model # / part # of all the boards, and preferably a link to them / where you bought them. I need to know in order to do a proper evaluation of the situation. I don’t want to tell you to do something may or may not be possible.

      I can tell that he Kahdas Toneboard is the Generic version, not the VIMS. This is the page.

      If  you could tell me the info on the rest, I can help.


    • #11337
      mullins
      Member

           I understand you’re busy and I’m in no hurry as long as I know there is someone here willing to help. GREATLY appreciated! So my goal is to link these boards together, build the custom enclosure (that’s my forte) and have a power button on front (maybe a meter if we can get fancy) and a power input with speaker outs on the back. Super simple and clean. Parts are:

      1. Sure Bluetooth 4.0

      https://www.parts-express.com/sure-electronics-aa-ab41136-bluetooth-40-audio-receiver-board-aptx–edr-12-vdc–320-351

      2. External Bluetooth antenna kit

      https://www.parts-express.com/external-bluetooth-antenna-kit–320-625

      3. Khadas tone board – generic

      https://www.khadas.com/tone

      4. Ice power 200AC

      https://www.parts-express.com/icepower-200ac-class-d-audio-amplifier-module-1-x-200w–326-210

      5. Ice power 200ASC

      Same one from 123toid’s video
      (no link/out of stock)

      Let me know if you have any other questions and thanks again.

    • #11339
      123toid
      Keymaster

      @mullins

      So you want to go bluetooth to tone board to Ice, correct?  I didn’t see any input on the tone board but spidif.  Is that correct?


    • #11342
      mullins
      Member

      @123toidyou are correct. The power connection is also an input. Example: plug it into a laptop and power it as well as stream music from it. But with that being my power connection I believe with my setup the spidf is my only option for an input.

    • #11345
      123toid
      Keymaster

      @mullins

      Here is what I am thinking.  Assuming your tone board can hook up via USB as a dac, I think the best way to wire it would be to wire the bluetooth rca output into the rca on the toneborad (it states it is an in or an out).  Then I would buy the 30pin extention for the tone board which has an 8 rca output (did it come with it, should be a ribbon cable).  This would allow you to to output that rca to the Ice  boards.  Of course, I will see what @tvor-ceasar thinks of this.

      Another option would be to get a selector switch between the tone board and the bluetooth. 


    • #11346
      123toid
      Keymaster

      Never mind that won’t work.  I just read that the RCA is output only.  The spdif is either. I think if you want bluetooth, you will need to do a  selector switch.  Or just ditch the bluetooth. 

      Maybe something like this?  I would desolder two of the input and the output.  THe out would go to the ICe and the the two input would go to the the DAC and the bluetooth.  Then you would have two more inputs if you like. 


    • #11347
      mullins
      Member

      If the Bluetooth is digital and the rca outs from the Bluetooth board are analog then it must convert somewhere on the Bluetooth board. Correct? If so, can I just skip the “converter” and rca outs on the Bluetooth board and send the digital signal from Bluetooth direct to the tone board spidf? Less things to pass through, so to speak, the better anyway I would assume. I found an rca to spidf out converter and it made me think. Why take a digital signal from the Bluetooth receiver, convert it to analog rca out, send it to an rca/spidf converter, convert it back to digital, send it to the tone board digital spidf so it can be converted back to analog (albeit better) and sent to the ICe amps? Haha Am I trying to be too big brained?

    • #11349
      tvor-ceasar
      Moderator

      Jumping in finally. As far as I can see, the Bluetooth is Analog out only, both RCA Line Out and 1/8″ (3.5mm) for headphones. Besides, Bluetooth is it’s own format, and is converted in the main chip on the board. Granted, if someone wanted to program a module to output a Digital signal, then they haven’t come forth yet, AFAIK. 🙂

      The ToneBoard has computer I/O via the USB C (as well as powering the unit), and is definitely set up to use the S/PDIF for digital source. Output is via analog RCA.

      Since we are interested in the outputs here, you’ll need some sort of switching arrangement, either a manual DPDT switch or an electronic RELAY of some sort to help isolate the analog outputs from each other. You don’t want to inadvertently feed a signal the wrong way into either and mess up the board(s). I personally would prefer a Triple Pole Double Throw switch similar to this one, simply to make sure the audio grounds are separated also. Or you could use something like Nick linked to up above.

      Check out this thread for information on the Ice module. It is specifically for the 200ASC, but it should help.


    • #11350
      mullins
      Member

      Would this make life easier? Bluetooth 5.0 with coaxial digital out.


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