On Fri, Jul 29, 2011 at 1:43 PM, Jeff Walther <[email protected]> wrote:
> Unless someone is going to do all the design and assembly free of
> charge, one quickly finds that the unit price of these projects
> quickly approaches the price of what is commercially available.
>
> Even if you assume there is a market for 100 of something, the printed
> circuit board alone will still run $10 - $20 (depending on size and
> layers).   Add some kind of microcontroller or FPGA for another $10.
> Connectors, either SCSI or PDS can add up.   And then one usually
> finds that there are a handful of other chips at $.50 to $2 each that
> are needed to tweak and/or isolate the buses, and before you know it
> the parts alone are up in the $30 - $60 range.
>
> And that's not allowing anything for assembly.   Soldering this stuff
> together and testing it easily runs to an hour or two per unit for a
> simple project.   One can pay for assembly, but that adds to the cash
> outlay, and the units still need testing.
>
> So the person doing the project is looking at putting in $3000+ up
> front plus a huge amount of time and effort with no certainty that 100
> of them will sell.  Even if one writes the time off as good-hobby-fun,
> It make sense to try to get one's money back out of the first 50
> units.
>
> And now the price is up at about the same price as the expensive stuff
> already on the market....
>
> I'm not saying this is a good thing.  I'm just pointing out the
> unfortunate economics of these kinds of projects.
>
> If one can be reasonably certain of the demand, it's easier.   If the
> volumes were larger, it would be much easier.
>
> Jeff Walther


Absolutely true. I just bought several SCSI-CF adapters from
artmix.com for $99 each. A little expensive, but the guy probably
isn't making much money on them.

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