April 3, 2020 at 6:33 am #11050
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👍🏼👍🏼
April 3, 2020 at 9:26 pm #11053
April 4, 2020 at 4:08 am #11054
@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?
April 10, 2020 at 12:34 am #11085
Nobody? I have an ASC and an AC sitting here and a Khadas tone board and Shure Bluetooth 5.0 board en route. Thanks
April 10, 2020 at 4:47 am #11086
April 12, 2020 at 4:28 am #11100
April 12, 2020 at 5:53 pm #11101
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.
April 25, 2020 at 1:24 am #11260
May 4, 2020 at 1:40 am #11333
May 4, 2020 at 4:42 am #11334
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.
May 4, 2020 at 11:30 pm #11336
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.
May 5, 2020 at 2:43 am #11337
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
2. External Bluetooth antenna kit
3. Khadas tone board – generic
4. Ice power 200AC
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.
May 5, 2020 at 4:54 am #11339
May 5, 2020 at 2:31 pm #11342
@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.
May 6, 2020 at 3:56 am #11345
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.
May 6, 2020 at 4:03 am #11346
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.
May 6, 2020 at 4:35 am #11347
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?
May 6, 2020 at 5:19 am #11349
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.
May 6, 2020 at 2:31 pm #11350
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