[XCSSA] Want to build a SID synth but don't have time for the MB-6852?

[X-otic Computer Systems of San Antonio]

Thanks to help from Tweeks, I was able to resolve the power issues  
with the MB-6582 and was able to run without issues for over an hour.  
The problem was the input voltage to my 7805 regulator was causing it  
(and the heatsink it was attached to) to get really hot. I was able to  
largely resolve this by using 4 1-Ohm power resistors in series, which  
dropped the voltage from 12V to 8V before the 7805.

I've got the resistors in a heatsink sandwich to help with heat.  
Though the resistors seem to get hotter than the regulators, it's  
still reasonable. I plan on moving everything over to a gutted PC PSU  
case so I can help use that for heat, as well as mount a fan. That's a  
short term fix - I ultimately want to get printed boards of all this  
and put this into a custom case.

In any case, the only things left are to figure out the control  
surface issues (still having a few), figure out the LCD (it's got to  
be a short somewhere) and really the rest is just cosmetic and minor  
odds and ends. I don't want to jinx it so I wan't confirm 100% I'll  
have this by next meeting, but things are looking good!

Tim



On Sep 27, 2009, at 2:23 PM, X-otic Computer Systems of San Antonio  
wrote:

> Wow that looks pretty cool! For me, though, the primary application is
> music makings so the extra precision I can get with the PICs (and soon
> PICs plus an ARM core).
>
> As for when the MB-6852 will be ready, famous last works, but I've
> been able to get things stable and get it to make music (wh00!). Still
> working on fixing some quirks with the LCD and think I am using fuses
> that are too small. Once I get all that up and running, it should be
> ready for show. The mainboard to CS cabling is a bit fragile, so I
> don't know if I'll be able to open it up at the meeting but I'll bring
> it and make some kick-ass noise with it :)
>
> Tim
>
>
>
> On Sep 26, 2009, at 9:53 PM, X-otic Computer Systems of San Antonio
> wrote:
>
>> That's a nice setup but I think I want to put my SID's in my Replica
>> one
>> or similar...
>>
>> Perhaps something like this,
>> http://i385.photobucket.com/albums/oo298/fsafstrom_2008/100_1092.jpg
>> That would be pretty cool... ;-)
>> I do have the manuals as PDF if anyone is interested.
>>
>> I recently came across one of these,
>> http://i385.photobucket.com/albums/oo298/fsafstrom_2008/100_1095.jpg
>> http://i385.photobucket.com/albums/oo298/fsafstrom_2008/100_1096.jpg
>> http://i385.photobucket.com/albums/oo298/fsafstrom_2008/100_1097.jpg
>> http://i385.photobucket.com/albums/oo298/fsafstrom_2008/100_1099.jpg
>> I think it would be cool to put the Replica one on this one and use
>> the
>> SID for sound effects...
>>
>> I'm really looking forward to see your MB-6852, do you have any idea
>> on
>> when you can show it ?
>>
>> /Fredrik
>>
>> X-otic Computer Systems of San Antonio wrote:
>>> For the SID fanatics out there (I think that might just be me, but
>>> maybe Fredrick too?) check this out!
>>>
>>> http://www.midibox.org/forum/index.php/topic,14079.0.html
>>>
>>> From the same guy that made the MB-6852 (which I will still show at
>>> the meeting one of these days once I finished it), a smaller, easier
>>> to build, translucent little brother! It only sorts 2 SIDs but is
>>> much
>>> easier to build than the full MB-6852, is easier to supply power to,
>>> etc.
>>>
>>> The best thing is that it comes with a case, which has always been
>>> the
>>> biggest problem I have had.
>>>
>>> I'm definitely grabbing up one of these once they are available and
>>> will happily show it once I'm done (the thing could easily be built
>>> in
>>> a day).
>>>
>>> Tim
>>>
>>>
>>>
>>> _______________________________________________
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>>> XCSSA at xcssa.org
>>> http://xcssa.org/mailman/listinfo/xcssa
>>>
>>>
>>
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