tag:blogger.com,1999:blog-2514187889603153283.post6653360490034547170..comments2023-08-24T07:01:18.979-04:00Comments on YZRandomE: DIY OVC3860 Bluetooth Receiver / PKB-PCBA Evaluation BoardYangoranghttp://www.blogger.com/profile/03413665327249318070noreply@blogger.comBlogger26125tag:blogger.com,1999:blog-2514187889603153283.post-74832206886407825772015-01-22T05:48:35.128-05:002015-01-22T05:48:35.128-05:00By the way, I almost integrated WT32 in the new ve...By the way, I almost integrated WT32 in the new version of Bluetooth module for my http://imBMW.net device instead of OVC3860, you'll like it :)Anonymoushttps://www.blogger.com/profile/14496597904278184051noreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-65689003536045497112014-04-16T20:43:01.619-04:002014-04-16T20:43:01.619-04:00As far as I've seen the module seems to always...As far as I've seen the module seems to always be available for pairing and doesn't seem to ever turn itself off. I'll keep an eye on it in my car to make sure but that's how I think it's been so far.Yangoranghttps://www.blogger.com/profile/03413665327249318070noreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-44078506226418122722014-04-15T00:38:26.974-04:002014-04-15T00:38:26.974-04:00Does this module automatically power down or switc...Does this module automatically power down or switch to power save (sleep) mode when no decice is paired? If it does, anyway to disable power save mode such that the module would be on at all time?Anonymoushttps://www.blogger.com/profile/08841725262987006403noreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-75485724578410772732014-02-22T00:31:14.532-05:002014-02-22T00:31:14.532-05:00This is true of the BLK-MD-SPK-B board for the OVC...This is true of the BLK-MD-SPK-B board for the OVC3860 which is used as part of the PKB-PCBA.<br />http://www.electrodragon.com/w/index.php?title=PKB<br />http://www.electrodragon.com/product/bluetooth-audio-stereo-voice-sound-box-module-bqb-certificated/<br /><br />The PKB-PCBA board, however, most likely has its own LDO regulator since it states "Voltage input: from 4.2V to 10V, best at 5V" on the ElectroDragon website. Measuring between pin 12 (VBAT) and pin 13 (GND) of the BLK-MD-SPK-B board yields approx 3.57V so I can confirm they are not simply feeding the 5V straight to it.Yangoranghttps://www.blogger.com/profile/03413665327249318070noreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-77860439248279957392014-02-17T08:26:29.039-05:002014-02-17T08:26:29.039-05:00Here is .NET MF class to work with that module usi...Here is .NET MF class to work with that module using AT commands ;) https://github.com/toxsedyshev/imBMW/blob/master/imBMW/Multimedia/BluetoothOVC3860.csAnonymoushttps://www.blogger.com/profile/14496597904278184051noreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-81635590571304567052014-02-17T08:25:24.574-05:002014-02-17T08:25:24.574-05:00Hi! Are you sure that it is ok to power that modul...Hi! Are you sure that it is ok to power that module with 5V? All datasheets I've found say that it should be powered with 3.3-4.2V.Anonymoushttps://www.blogger.com/profile/14496597904278184051noreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-45646863531957826642014-02-17T08:23:18.798-05:002014-02-17T08:23:18.798-05:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/14496597904278184051noreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-81875030328313316312013-08-28T18:52:10.244-04:002013-08-28T18:52:10.244-04:00Hi Yangorang, I am the guy on diyaudio.com you men...Hi Yangorang, I am the guy on diyaudio.com you mention.<br /><br />The device delivers surprisingly good audio for such a cheap part, but it doesn't offer a digital-out. I am looking into the Roving Networks RN-52 as it has digital out, but the datasheet isn't too good. I have emailed them to ask for some more information, if I get any info, I'll add it to the thread I started on the diyaudio forum.<br /><br /><br />CraigAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-6854659203339791672013-08-25T18:41:43.130-04:002013-08-25T18:41:43.130-04:00Here a link to another guy that also used this mod...Here a link to another guy that also used this module for his project: http://www.diyaudio.com/forums/digital-source/240457-streaming-macbook-pro-iphone-via-bluetooth.html<br />He might know more about it than myself as his project is a bit more involved.<br /><br />One very useful bit of information he provides: "There are 13 tabs on each side of the board, you can use the 1.8v output tab and feed that into the FWD or BACK tab, and the iPhone skips songs. There are also vol+, vol- and mutes tabs, but I believe these are used on the BT reciever, not for controlling the volume of the device paired with it."<br /><br />I might consider stacking a 2nd PCB on top with a few control push buttons now that I know it's so easy to deal with.Yangoranghttps://www.blogger.com/profile/03413665327249318070noreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-68313033311069802612013-08-25T18:26:34.810-04:002013-08-25T18:26:34.810-04:00It's surprisingly good for a module of its pri...It's surprisingly good for a module of its price with a bunch of no-name parts isn't it?<br /><br />I'm not familiar with antenna design myself, but I'm fairly certain there's more to it than just the area. In your case though if you're surrounding the thing with aluminium you may be forced to explore a solution like you mentioned.<br /><br />For me I've found the range to be quite good - as I dropped off a friend who was connected to it (I was stopped on his driveway) I found the music was still playing on my car perfectly fine until he entered his house.<br /><br />I haven't really done detailed range testing for this module - that would be some useful data to have if anyone would be willing to help contribute.Yangoranghttps://www.blogger.com/profile/03413665327249318070noreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-71549151723554659492013-08-25T18:18:20.920-04:002013-08-25T18:18:20.920-04:00I tried searching for my original prelim test circ...I tried searching for my original prelim test circuit so I could take a picture of the back but I couldn't find it. There is a low-res image of it available at the ElectroDragon webpage: http://www.electrodragon.com/?product=pkb-pcba-bluetooth-stereo-audio-module-for-music-speaker<br /><br />My assumptions on the SGM4917 were based on the shape/pinouts of the IC and its surrounding components as well as some information I had gleaned off a website with some details on the SGM4916: http://www.52rd.com/blog/Archive_Thread.asp?SID=64002<br />That webpage is now down unfortunately but I had the URL bookmarked still. It's one of those Chinese parts from who knows where so it's doubtful we'll ever get our hands on a proper datasheet.<br /><br />It's purpose should be similar in nature to the TPA6132A2, though obviously it's a much cheaper and lower performance part.Yangoranghttps://www.blogger.com/profile/03413665327249318070noreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-87608176871202538772013-08-25T18:02:26.357-04:002013-08-25T18:02:26.357-04:00Good find! - this will definitely be useful for so...Good find! - this will definitely be useful for some people.Yangoranghttps://www.blogger.com/profile/03413665327249318070noreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-44934570375049245412013-08-24T14:04:13.011-04:002013-08-24T14:04:13.011-04:00I tested this module and it works very well. Befor...I tested this module and it works very well. Before I implement it into a amp I am building, which will be mainly made of aluminium, I suspect the aerial may not work too well. Can I solder a wire to the aerial on the PCB to extend it, or does it have to be the set length that is on the board.<br /><br />Craig<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-51872954931358673492013-08-24T13:01:22.679-04:002013-08-24T13:01:22.679-04:00I just found a little bit more info on the pins:
...I just found a little bit more info on the pins:<br /><br />http://www.elecfreaks.com/wiki/index.php?title=BLK-MD-SPK-B<br /><br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-26700858610467997272013-08-23T22:56:06.253-04:002013-08-23T22:56:06.253-04:00I agree, I don't have that module. Would you m...I agree, I don't have that module. Would you mind taking a picture of the SGM4917 IC please? Or do you have the datasheet? I looked for it but no luck. The closes thing was this http://www.ti.com/product/lm4917Paul Gomezhttps://www.blogger.com/profile/06526453433824640665noreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-84187062422700628952013-08-22T22:46:49.359-04:002013-08-22T22:46:49.359-04:00The BLK-MD-SPK-B PCB is just one part of the PKB-P...The BLK-MD-SPK-B PCB is just one part of the PKB-PCBA board - it takes up basically a whole side of the PKB-PCBA board and contains the OVC3860 IC and the signal antenna trace.<br /><br />If you look at the other side of the PKB-PCBA you'll notice that it has a SGM4917 IC. I don't know much about this IC, but it seems to be a fully integrated headphone amplifier that is ground referenced as it generates its own negative rail via charge-pump and it also features click-pop suppression which is a big plus. I think that the usage of this IC with the BLK-MD-SPK-B module likely yields better sound quality than the design in your link.<br /><br />I believe it's best to keep things simple, and the PKB-PCBA already has everything you need for car audio in a cheap and fairly robust package.Yangoranghttps://www.blogger.com/profile/03413665327249318070noreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-5186859020126095682013-08-22T20:29:35.480-04:002013-08-22T20:29:35.480-04:00Hi Yangorang,
In the application notes from the P...Hi Yangorang,<br /><br />In the application notes from the PKB wiki, they use an ST TS482 100mW Stereo Headphone Amplifier. Why didn't you use the amplifier for the audio headphone jack?<br /><br />Is the sound good enough?<br /><br />see http://www.electrodragon.com/w/File:PKB_peripheral_circuit_design.jpgPaul Gomezhttps://www.blogger.com/profile/06526453433824640665noreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-47691928254796795062013-08-16T00:46:36.828-04:002013-08-16T00:46:36.828-04:00I don't believe this module has any sort of di...I don't believe this module has any sort of digital output capabilities - you'd have to get something more advanced like the Bluegiga WT32 or Roving RN52. Your project would become way out of my leauge of simple projects with those modules.<br /><br />What's MFB stand for?Yangoranghttps://www.blogger.com/profile/03413665327249318070noreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-30660460197147137832013-08-16T00:20:37.536-04:002013-08-16T00:20:37.536-04:00Sorry, but I've honestly got no idea how the T...Sorry, but I've honestly got no idea how the TX/RX pins work and none of the documentation I've seen makes any mention of it either. You could try emailing ElectroDragon support about it to but they've been pretty useless for me so far.Yangoranghttps://www.blogger.com/profile/03413665327249318070noreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-5890493400818963472013-08-13T17:27:23.616-04:002013-08-13T17:27:23.616-04:00Hi there, great article!
Do you know anything abo...Hi there, great article!<br /><br />Do you know anything about the TX/RX pins? I can't seem to access them and exchange AT commands. Do you know anything about that?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-16145700028450642912013-08-08T15:36:48.845-04:002013-08-08T15:36:48.845-04:00I have a couple of questions if you know the answe...I have a couple of questions if you know the answers.<br /><br />What is the input MFB? and is it possible to get a digital stream output from this module to put through my DAC?<br /><br />Great blog by the way :)<br /><br /><br />CraigAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-59358998798607493922013-08-05T00:25:26.350-04:002013-08-05T00:25:26.350-04:00I only measured 85mA when driving headphones with ...I only measured 85mA when driving headphones with the circuit. This was measured with a fairly basic DMM when driving the circuit from a 12V bench power supply.Yangoranghttps://www.blogger.com/profile/03413665327249318070noreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-40205712916521813512013-08-04T18:40:29.094-04:002013-08-04T18:40:29.094-04:00How much current does the whole circuit consume? How much current does the whole circuit consume? Martinnoreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-29720637498582512372013-06-10T05:42:47.767-04:002013-06-10T05:42:47.767-04:00As far as documentation goes I honestly haven'...As far as documentation goes I honestly haven't found much of anything particularly good.<br />http://www.electrodragon.com/w/index.php?title=PKB-PCBA<br /><br />You could try asking the customer service of companies that sell the module to see if they have any additional information, but most of them seemed pretty clueless when I asked a few things.<br /><br />I usually just use my phone's playback controls, but I have seen modules with buttons for sale on AliExpress so for sure it can be done.Yangoranghttps://www.blogger.com/profile/03413665327249318070noreply@blogger.comtag:blogger.com,1999:blog-2514187889603153283.post-54913962873017097632013-06-06T00:20:31.467-04:002013-06-06T00:20:31.467-04:00Actually the PKB module might do exactly what I wa...Actually the PKB module might do exactly what I want to do right out of the box!pnnortonhttps://www.blogger.com/profile/11003252971757619515noreply@blogger.com