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sbm

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Posts posted by sbm

  1. Yeah this is a brilliant summary.  No, it isn't too late to build, so long as the PCBs are still available which is the main thing.  Everything is still available and the MOS chips are getting harder to find, so I turned to ARMSIDs. (it took me 2.5 years to build, in spurts, on-and-off).

     

    Be warned it is a big project with lots of soldering to do - not that hard, just tedious, but other way to look at it is that it's all practice, practice, practice!

    @dwestbury, do you have a link to a complete schematic?  I'm in need of one since today I finally finished the last bits of this, but no ekyboard input and nothing on LCD.  But power sound and the dancing LED matrix all work fine.  Almost there.

     

    Which brings me finally to my next point - this is a fairly big project to assemble so take your time with it and don't be frightened or discouraged.  Some times things don't wor 100% but there's help here.

    • Thanks 1
  2. 12 hours ago, Rio said:

    This is a far better option than wearing down the c64 socket or the SID that is in my beloved C64.

    Totally agree, especially since I have been holding off buying any SIDs and clones because I don't have a C64 - not for a huge long time.  Makes no sense to get a creaky one just to program the clones, so this adapter is a great idea.

  3. Thanks Darrell! I received the cable assemblies and looks like I have the version with both headers being straight, not half as right-angle.  I'll have to check clearances but maybe I can gently bend the pins to fix that.  Otherwise I'm shelving the build for now as there seems to be part shortages and I have to wait.

  4. Hi all

    So like some other folks around here, it's the MB6582 bug that has now got me.  But before I commit, I wondered about the status of obtaining the right SID clones vs tracking down the old ones.  I've seen various older postings about the clones and some comments to the sound quality.  These days, which SID clone would be best used today in a MB6582?  Or is simply sticking to the original SID still the way to go, despite their age (and maybe fake ones floating around)?

     

    Thanks for any guidance.

  5. On 8/18/2020 at 3:07 PM, jemtone31 said:

    Hi...I'm am also in need of the STM32F4 CORE board and am upset modular addict is down. Located in states I am...anyone know where or how to acquire???  Thanx Danka,

     

    +1 Looking to get a couple of modules too, but hope those guys are OK and only on holiday :happy:.  The brd files for the newer stuff aren't available but at least the older ones are if it comes to that.

  6. On 12/26/2015 at 10:33 AM, sbm said:

    Well, from bad to worse, looks like my board is shorted now.  Not sure how that happened but I measure 2.5 ohms resistance between ground and 5V.  That was a waste. :-/

    Should have updated this....an air-driven reflow station is your friend when it comes to making fixes to SMD parts! :happy:

     

    This was a lot of fun to do and get working.  Looking forward to building another one day. :cheers:

  7. On 12/14/2015 at 1:46 PM, sbm said:

    HI all,

     

    looks like I'm almost there.  From what I have seen in the power-on test, I have 3 rows not working.  I'm guessing this is down to a cold solder joint or a short.  They are (going by transistor Q number):  Q29, Q19 and Q22.  Would a cold solder joint some place be the top of the list of culprits?

    Well, from bad to worse, looks like my board is shorted now.  Not sure how that happened but I measure 2.5 ohms resistance between ground and 5V.  That was a waste. :-/

  8. HI all,

     

    looks like I'm almost there.  From what I have seen in the power-on test, I have 3 rows not working.  I'm guessing this is down to a cold solder joint or a short.  They are (going by transistor Q number):  Q29, Q19 and Q22.  Would a cold solder joint some place be the top of the list of culprits?

  9. Wow, what an awesome build this all was.

     

    Now that the 'hard' part is done, comes with 'soft' part:  What's not clear to me, using a virgin PIC (F4620), is what firmware this BLM would use?  Is it just a matter of loading the bootloader and that's it?  Or should the blm_scalar_v1.0a.zip file from the MIOS download site?

  10. Just to let everyone know I am still progressing :)

     

    The hardest and most time consuming part (besides work and life in general) has been machining the panel.

     

    In other news, I have plenty of photos of the build, but not yet found a way to upload to the gallery; the power supply circuit seems not to work, it might be a bad lot of parts, so I need to create a different power supply for the main board; I see that Christian Hartig has taken the site down as he's no longer working on the project. I that makes it one of the last TR-808 clone builds left.  Hopefully it's not because it turns ut the board design had problems. :-/.

     

    Onwards and upwards!

  11. Hi guys

     

    SO here is the long and the short of it:

     

    I spent many hours reading through everything last summer, again picking up things this summer.  I noted that there was Moogah's cool version since taken over by Doug Wellington (https://www.eight-oh-eitght.org/, now defunct).  Thanks to a posting above, I found the Eagle PCB masks for each section of the project, but no knowledge on how to merge all the masks/layers together, so I didn't spend much time on it.  I also had to think about what I read of the old 808 forum through the Internet Archive, which had some postings above board errors and such, but not much else on what those errors were, which sealed the fate of that part of it:  I wouldn't be using that as the basis for the build.  The only thing potentially salvageable from that mess was the parts list, so I simply confirmed I had most of the resisters and capacitors, plus at least some of the seqv3 boards and DINS and DOUTS to roll it that way (thanks to Shuriken's post above). Warning:  Don't follow the Doug Wellignton list that was once there strictly:  I was told that the design changed, so it's still good as a guide, but that's all.

     

    Another posting above (zephyrin's) to Christian Hartwig's version gave me much encouragement, so by this spring I had better confidence that the PCBs for both the power and the tr-0806 (http://www.christian-hartig.de/TR-8060/) would work.  (Thanks to Christian for releasing those).  So now I had the MIDI part as well as well as voices part.  He also released a parts list + sources and it's pretty complete I have to say.  I took the board files, had them produced and I am impressed.  I only found 2 mistakes on the main board as I remember (missing parts values) so what a job to do it oneself, well done.  Another thing I did find was the tolerances on the board were tight, so the parts in the list seemed to be several microns to big (connectors in particular) for many spaces on the board.

     

    I then contacted TK's front panel supplier to order what turns out to be the last one he'll make since he says it's pretty hard to do these days.  Managed to get that, plus I picked up a Hammond case similar to SeakThief's since I thought it would make a good chassis for the whole thing.

     

    The last several weeks have been just a lot of work soldering with breaks to do some drilling here and there.

     

    More later!

  12. Hi,

     

    The some Eagle files from the eight-oh-eight.org forum, i think.

     

    Regards,

    Janis

     

    attachicon.gif808_production_Individual_Files.rar                              

     

    Oh wow that's amazing thank you.

     

    In the Internet Archive, a discussion can be found about these files, but the links are all dead - you're better than the Internet Archive! :smile:

     

    So from what I see these are the individual files for each part of the circuit, also how it traces on each region of the board.  Does anyone know how these files can be combined, or if they can be combined into one board?

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