Re: [cosmacelf] Re: Elf2000 Redux ?
- On 10/05/2011 12:44 PM, Bob Armstrong wrote:
> It's all about quantity. If you want a nice, solder masked silk screenedAnother option would be to publish the Gerbers so a motivated user could
> PCB at a price people won't complain about, I'd need to be able to sell at
> least 25, preferably 50 of them. I just don't see that happening. And
> frankly I'm not sure I see the value - yes, 1861 chips are harder to find
> than 1802s, but they come up here and on eBay from time to time. There was
> a mass buy of several dozen a couple of years ago; just get together and do
> that again. Or if you really must have a STG1861, then it'd be fairly
> simple to build one using wire wrap and pad per hole perf board. After all,
> it's only got four chips!
get a board manufactured on their own. Or make boards available through
the BatchPCB marketplace.
The STG1861 PCB appears to be less than 4 sq. in. so at $2.50/sq. in. it
would be less than $10. But the shipping and batch charges would more
than double that so ordering several at a time would be preferred.
I have ordered boards from BatchPCB and like the results. I haven't
taken the plunge to register for the marketplace yet but I doubt if
anyone is that interested in my projects. :-)
David W. Schultz
"Put down that pickle!"
- On 11/18/2011 12:52 AM, wmaalouli wrote:
> Would these work? 4 of them will make a 24 pin stackable header.I haven't seen an Elf2k board myself, and don't recall seeing a picture
> --- In email@example.com, "Bob Armstrong"<bob@...> wrote:
>>> board-to-board connector. That was a special part, right?
>> The ones I sold were special stacking connectors, yes, but I don't have
>> any more of those. They were made by Samtec and the minimum order and
>> pricing isn't very attractive, and I wasn't planning to source any more.
>> As long as you only want to stack two boards (e.g. Elf2K and Disk) then you
>> can get by with ordinary headers. Alternatively you can kind of get three
>> level wire wrap headers to stack if you get the board to board spacing
that was good enough to tell exactly how it uses the stacking connectors.
Would the Molex KK series work? It is very common, inexpensive, and
second sourced. 0.025" square pins on 0.1" centers. I used them on the
Membership Card. The male pin half is just a common header. The female
half has the pins that solder to the PCB offset from the male pins; so
you can solder a second male header to the other side of the board, or
use long pins that pass right through a stack of boards each with female
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