group buy for homebrew CPUs?
mouse at Rodents.Montreal.QC.CA
Sat Aug 12 15:48:43 CDT 2006
>> This sounds as though you're talking strictly about soldering them
>> to a printed-circuit board. If so, that's a lose right there,
>> compared to DIPs, if you can't connect to them (without equipment
>> prohibitively expensive for hobbyist use) except via a PCB.
> Well that's pretty much a given...there's really no other way to do
> that. [...]
So, there's a fairly clear way in which surface-mount is harder to work
with than DIPs: you can't breadboard the things, and doing flying leads
is (at best) a good deal harder.
> Quick-turn PCB houses are super cheap these days, though,
Hm? So moving to SMT means that instead of buying a $1.19 part to
breadboard a circuit with, I instead can buy a $0.89 part and throw
$12.99 at the minimum order for a PCB so I can connect to it.
Remind me again how surface mount is better?
Oh, okay, let's say I can bundle ten chips' PCBs into that order. So I
have $0.89+$1.299. This is still a dollar more than the $1.19 DIP.
> As I've said a few times, things are *different*...trying to treat it
> like "a smaller version of through-hole construction" will not work.
Different...and harder, it appears, since at a minimum you need less
common (and more expensive) tools, and that's if you're doing a
finished design and just trying to assemble the thing. If you're
breadboarding, even your parts are more expensive, since you have to
add the piggyback carrier to the part cost.
/~\ The ASCII der Mouse
\ / Ribbon Campaign
X Against HTML mouse at rodents.montreal.qc.ca
/ \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B
More information about the cctalk