[sdiy] RE: [sdiy] EFM Seq-2A

[Eric Brombaugh]

Hi,

I'm new here, lurking and just now figuring out what the subtext is. I 
gather that EFM went out of business sometime last year and their 
website is currently blank. What a shame - it looks like they had some 
neat designs and I'm sorry that I missed the opportunity to buy stuff 
from them. Fortunately, the Internet archive has a lot of their material 
squirreled away. I found a PDF for the Seq-2a which describes the trace 
modification. Find it here:

http://web.archive.org/web/20050306020133/http://www.ele4music.com/pdfs/seq2a.pdf

Hope that helps.

Eric

PS - what happened to EFM? Any idea if they might come back?

Tom Arnold wrote:
> On Wed, Feb 08, 2006 at 11:04:27AM -0500, Dave Magnuson wrote:
>   
>> Here's the details of the short:
>>
>> There is a jumper (wire link) you need to install on the top of the board 
>> between Pin 12 of U5 to ground.   At the end of the jumper furthest from 
>> the IC (at the ground bus) the pad is too large... so the ground bus is 
>> connected to the adjacent trace on the circuit board.
>>
>> You need to seperate the pad from the neighboring trace, but leave it 
>> conencted to the ground bus
>>     
>
> I have one of these boards fully stuffed.  I dont see the U5 pin-12 error.
> Pin 12 connects to a pad right next to it that has a jumper to the ground
> bus down the middle of the board.
>
> I havent spent a huge amount of time trying to make it work yet.
>
> The saddest part about this, following my long-standing rule of making the
> front panel/case/whatever first ( got tired of piles of stuffed boards around
> waiting for me to make enclosures ), I made the enclosure first and its been
> sitting here taunting me for about a year now...
>
>