Timothy Miller wrote:
On 10/22/05, Daniel Rozsnyó <[EMAIL PROTECTED]> wrote:
So, please do not use IDE connector for GPIO (to avoid the use of
inproper cable - rather use an 50 pin variant, where anybody can get
headers and flat cables and assemble them easily).
Ok, that's fine. Is the 50-pin variant common? How about SCSI? Any
of those simple enough connectors?
Basically, whatever you guys come up with is what I'm going to
recommend to Andy. Better still if you can find the part in a
catalog. Maybe we should have a contest. Whoever identifies the
best, cheapest solution gets a free T-shirt if that's what we end up
using. :)
I believe that in the "low-end", the 50 pin connector (also used for
scsi) would be excellent. Maybe we can put two of them - so they can
hold the daughterboard or flat wire cable and/or use the lot of pins as
shield.
I prefer to use the variant without the "frame" around the connector,
like this: http://www.gradconn.com/Thumbs/bb02-fe.gif (it needs lower
force to mount/unmount the daughter card), the framed connectors like
IDE/FDD are primarily for cables.
-
Other possibilities are:
Use a SO-DIMM like socket (mechanically designed for high frequencies -
they are used for laptop memories and wifi cards)
or
Use the HD (high density) variant of the pins mentioned above it
increases the frequency/power.
both of these variants significantly lowers the possibility to make
simple daughter boards at home.
-
one more point: if somebody wants to connect a device via the flat
cable: then in case of two 50 pin connectors, they must be independent
(i mean e.g. the power lines).
Daniel
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