[sdiy] New digital synthesis projects under way

[Eric Brombaugh]

George,

Not a lot happening with these boards since I first built them up.  
I've been busy working on a lot of other projects and they've been  
sitting on my bench for the last few months making me feel guilty for  
ignoring them. I have done some preliminary checkout and what I've  
tested so far seems to work fine though. I just need to make time to  
push further.

Eric

On Oct 24, 2009, at 1:52 AM, George P. Macklin wrote:

> Hello Eric,
>
> Any updates on these boards? They look really interesting.
>
> Cheers,
> George
>
>
> On Sun, Jul 19, 2009 at 10:03 AM, Eric Brombaugh  
> <ebrombaugh1 at cox.net> wrote:
>> Thanks Graham,
>>
>> Now that I've gotten some experience with SMD under my belt I'm  
>> pretty happy
>> with it. I find some distinct advantages:
>>
>> * PC boards are smaller (cheaper to fab)
>> * Ground planes are more contiguous (fewer thru-holes = better  
>> distribution
>> of supplies on back of board)
>> * Assembly is faster (don't have to flip the boards to solder &  
>> clip leads)
>> * Passive components are cheaper
>> * Component storage is more compact (100s on a strip of tape)
>>
>> Eric
>>
>> Graham Atkins wrote:
>>>
>>> Nice boards Eric, look very promising. The SMC part may put some
>>> people off, but as SMC is here to stay we need to get used to  
>>> it........
>>>
>>> have you noticed how commercial soldering pencils have become so
>>> tiny lately !. Seriously I think this "modular" digital approach  
>>> is what a
>>> lot of people have been thinking about for some time but you are  
>>> in the
>>> lead at the moment. Look at how well the Midibox project is doing.
>>>
>>> Graham
>>>
>>> On 19 Jul 2009, at 16:47, Eric Brombaugh wrote:
>>>
>>>> Just a quick update on the dsPIC synthesis boards I'm working on.  
>>>> I've
>>>> gotten the prototype PCBs back from the fab and have assembled  
>>>> two of them
>>>> to begin testing. So far everything appears to be working as  
>>>> intended,
>>>> including the dsPIC processors, CV / Pot signal conditioning,  
>>>> codec and
>>>> audio I/O buffering. I still need to test out the external RAM  
>>>> and EEPROM,
>>>> as well as the MIDI input.
>>>>
>>>> More details here, including photos of assembled boards:
>>>>
>>>> http://members.cox.net/ebrombaugh1/synth/dsPIC_sp/index.html
>>>>
>>>> http://members.cox.net/ebrombaugh1/synth/dsPIC_adac/index.html
>>>>
>>>> I'll post more as I get further into the firmware development.
>>>>
>>>> Eric
>>>> _______________________________________________
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>>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>>>
>>>
>>>
>>>
>>
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