Online documentation

[Balázs Kelemen]

Demonstration video: https://youtu.be/p5ptruefUnM
Documentation provided by Electrodragon: http://www.electrodragon.com/w/BK8000L
Technical description from fccid.io: https://fccid.io/pdf.php?id=2510161

[Balázs Kelemen]

I also attach the docs from fccid.io for sure.

[XanderZ]

I've sent an e-mail to Beken, requesting the piece of software required for configuring the firmware for the BK8000L. It should be interesting to see what response do I get :)

[Kelemen Balázs]

So did I some days ago. :)

Balazs

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[XanderZ]

Some random schematic

[XanderZ]

Do you have an oscilloscope to test out the distortion of this module? It should be interesting to see how much(if at all) distortion it will produce at maximum volume :)

You can basically get a frequency generator on the phone, put it on 1KHZ and put some load on the output of the module, or even a small speaker which has the impedance of around 32R. Then slowly rise up the volume on the phone, and see if it starts clipping(the peaks of the sinewave will be flat). But I guess you already know how to measure the distortion ;)

[XanderZ]

BTW, i believe you can also test the frequency-amplitude characteristic on the oscilloscope, but it would be time consuming, to do it manually. I'm curious to know how well it responds to lower frequencies :)

Also, the DAC has 24bit resolution or less? 

[Balázs Kelemen]

Electrodragon documentation for the BK8000L is not avaliable any more. (Maybe a missconfiguration?)
As I didn't have found any copyright notice on the site, I have restored the page from a web archive, and attach it here.
This documentation is the property of Electrodragon, and I may have to remove it later on any copyright claim arrives.

[Hejja Rudolf]

Thank you for sharing!