Date: Sat, 24 Jun 2000 17:23:06 -0700 From: "Blake" <humanhunter@connectstar.net> To: <freebsd-hardware@FreeBSD.ORG> Subject: Re: Hardware in Space Message-ID: <001101bfde3b$89437740$3700a8c0@skyline> References: <8070C3A4E99ED211A63200105A19B99B3176B3@mail.edifecs.com>
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Sure that would work, I'd get a socket prcessor too... it's attached to =
the motherboard a little cleaner.. K6-2 400 on a MB clocked at 33mghtz =
and the multiplier clocked low.. that should take care of the heat
----- Original Message -----=20
From: Michael VanLoon=20
To: 'Blake' ; freebsd-hardware@FreeBSD.ORG=20
Sent: Saturday, June 24, 2000 1:55 PM
Subject: RE: Hardware in space?
I don't think I'd get a P200. I'd go with a modern .18 micron =
processor, which will run very cool when under-clocked. Then go with =
the lowest speed the motherboard will support. Of course, modern =
processors are clock locked for the most part, so...
=20
Maybe a .25 micron K6-2 or K6-3, which is under-clocked, since they =
are not multiplier locked. An Athlon could do this too with a GFD, but =
the GFD would almost certainly fall of during dramatic shaking.
-----Original Message-----
From: Blake [mailto:humanhunter@connectstar.net]
Sent: Wednesday, June 21, 2000 11:17 PM
To: freebsd-hardware@FreeBSD.ORG
Subject: Re: Hardware in space?
try getting a faster CPU and underclocking it.. say a P200 running =
at 66mghz or something.. get a 100 bus speed mghtz cpu an run it at 66 =
mghz or 33... that will make cooling MUCH easier=20
----- Original Message -----=20
From: "Brian Handy" <handy@isass0.solar.isas.ac.jp>
To: <freebsd-hardware@FreeBSD.ORG>
Sent: Wednesday, June 21, 2000 5:17 PM
Subject: Re: Hardware in space?
> Wow! What a great dose of information! Thanks everyone!
>=20
> I've got a bunch of information, and a handful of people to =
respond to...
> so stand by, those of you who know who you are. Anyway, a couple =
of
> clarifications since I stirred up so much interest:
>=20
> - This is only the proposal stage of the instrument. The way NASA =
works
> is every year they make "Announcements of Opportunity", which is a =
thingy
> that invites us to write proposals to do work. There are lots of =
various
> categories of this, from data analysis of Solar Flares to =
theoretical
> consideration of pulsar evolution to proposing new instruments for =
the
> Next Generation Space Telescope. If we win, we'd start working on =
this
> sometime next year, probably, with a launch slated for about 3 =
years after
> that. =20
>=20
> - The sounding rocket environment isn't quite as bad as it sounds. =
The
> computer will be grounded to the chassis, but this doesn't mean =
it's going
> to get real cold. We've only got 5 minutes above the atmosphere, =
and I
> think it'd take a fair bit longer than that to get cold enough to =
matter.
> There's a group at Stanford that's taken this to an extreme:
>=20
> http://aa.stanford.edu/~ssdl/
>=20
> These guys are trying to get to where they can turn a satellite =
into a
> senior thesis project for a student. (I don't think they've =
gotten it
> down to a year yet, though.) Basically they're working on the =
level of
> re-inventing Sputnik. Amazing stuff, amazingly simple, teaches =
people a
> bunch. Way below the level of sophistication I have to aim for,
> unfortunately. I'm told some of their electronics parts come from =
Radio
> Shack! :-)
>=20
> -- While getting too cold probably isn't an issue, COOLING =
certainly is.
> As a few people have alluded to, cooling in space becomes an issue =
because
> there's no air. This will be a problem much earlier, because =
we'll
> evacuate the payload several hours before launch. If there's a =
delay, the
> package could wind up sitting on the launch rail for a few days =
under
> vacuum. I've worried about blowing the top off the CPU from the =
heat. I
> imagine it'll probably have to be heat-sunk to the chassis in some =
manner.
> Someone mentioned using a 486; that's not such a bad idea. Mostly =
I'm
> just grabbing data from the RS-232 ports and stuffing it to disk, =
so I'll
> probably wind up doing some experimentation to see just what I'll =
need.
>=20
>=20
> Thanks,
>=20
> Brian
> [Reporting in from Japan]
>=20
>=20
>=20
> To Unsubscribe: send mail to majordomo@FreeBSD.org
> with "unsubscribe freebsd-hardware" in the body of the message
>=20
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<DIV><FONT face=3DArial size=3D2>Sure that would work, I'd get a socket =
prcessor=20
too... it's attached to the motherboard a little cleaner.. K6-2 400 on a =
MB=20
clocked at 33mghtz and the multiplier clocked low.. that should take =
care of the=20
heat</FONT></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: =
0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A href=3D"mailto:MichaelV@EDIFECS.COM" =
title=3DMichaelV@EDIFECS.COM>Michael=20
VanLoon</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20
href=3D"mailto:humanhunter@connectstar.net"=20
title=3Dhumanhunter@connectstar.net>'Blake'</A> ; <A=20
href=3D"mailto:freebsd-hardware@FreeBSD.ORG"=20
title=3Dfreebsd-hardware@FreeBSD.ORG>freebsd-hardware@FreeBSD.ORG</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Saturday, June 24, 2000 =
1:55=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> RE: Hardware in =
space?</DIV>
<DIV><BR></DIV>
<DIV><FONT color=3D#800000 face=3D"Century Gothic"><SPAN=20
class=3D915043820-24062000>I don't think I'd get a P200. I'd go =
with a=20
modern .18 micron processor, which will run very cool when=20
under-clocked. Then go with the lowest speed the motherboard =
will=20
support. Of course, modern processors are clock locked for the =
most=20
part, so...</SPAN></FONT></DIV>
<DIV><FONT color=3D#800000 face=3D"Century Gothic"><SPAN=20
class=3D915043820-24062000></SPAN></FONT> </DIV>
<DIV><FONT color=3D#800000 face=3D"Century Gothic"><SPAN=20
class=3D915043820-24062000>Maybe a .25 micron K6-2 or K6-3, which is=20
under-clocked, since they are not multiplier locked. An Athlon =
could do=20
this too with a GFD, but the GFD would almost certainly fall of during =
dramatic shaking.</SPAN></FONT></DIV>
<BLOCKQUOTE>
<DIV align=3Dleft class=3DOutlookMessageHeader dir=3Dltr><FONT =
face=3DTahoma=20
size=3D2>-----Original Message-----<BR><B>From:</B> Blake=20
[mailto:humanhunter@connectstar.net]<BR><B>Sent:</B> Wednesday, June =
21,=20
2000 11:17 PM<BR><B>To:</B> =
freebsd-hardware@FreeBSD.ORG<BR><B>Subject:</B>=20
Re: Hardware in space?<BR><BR></DIV></FONT>
<DIV><FONT face=3DArial size=3D2>try getting a faster CPU and =
underclocking it..=20
say a P200 running at 66mghz or something.. get a 100 bus speed =
mghtz cpu an=20
run it at 66 mghz or 33... that will make cooling MUCH easier=20
</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>----- Original Message ----- =
</FONT>
<DIV><FONT face=3DArial size=3D2>From: "Brian Handy" <</FONT><A=20
href=3D"mailto:handy@isass0.solar.isas.ac.jp"><FONT face=3DArial=20
size=3D2>handy@isass0.solar.isas.ac.jp</FONT></A><FONT face=3DArial=20
size=3D2>></FONT></DIV>
<DIV><FONT face=3DArial size=3D2>To: <</FONT><A=20
href=3D"mailto:freebsd-hardware@FreeBSD.ORG"><FONT face=3DArial=20
size=3D2>freebsd-hardware@FreeBSD.ORG</FONT></A><FONT face=3DArial=20
size=3D2>></FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Sent: Wednesday, June 21, 2000 5:17 =
PM</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Subject: Re: Hardware in=20
space?</FONT></DIV></DIV>
<DIV><BR></DIV><FONT face=3DArial size=3D2>> Wow! What a =
great dose of=20
information! Thanks everyone!<BR>> <BR>> I've got a =
bunch of=20
information, and a handful of people to respond to...<BR>> so =
stand by,=20
those of you who know who you are. Anyway, a couple of<BR>> =
clarifications since I stirred up so much interest:<BR>> <BR>> =
- This=20
is only the proposal stage of the instrument. The way NASA=20
works<BR>> is every year they make "Announcements of =
Opportunity", which=20
is a thingy<BR>> that invites us to write proposals to do =
work. =20
There are lots of various<BR>> categories of this, from data =
analysis of=20
Solar Flares to theoretical<BR>> consideration of pulsar =
evolution to=20
proposing new instruments for the<BR>> Next Generation Space=20
Telescope. If we win, we'd start working on this<BR>> =
sometime next=20
year, probably, with a launch slated for about 3 years after<BR>> =
that. <BR>> <BR>> - The sounding rocket environment =
isn't quite=20
as bad as it sounds. The<BR>> computer will be grounded to =
the=20
chassis, but this doesn't mean it's going<BR>> to get real =
cold. =20
We've only got 5 minutes above the atmosphere, and I<BR>> think =
it'd take=20
a fair bit longer than that to get cold enough to matter.<BR>> =
There's a=20
group at Stanford that's taken this to an extreme:<BR>> <BR>>=20
</FONT><A href=3D"http://aa.stanford.edu/~ssdl/"><FONT face=3DArial=20
size=3D2>http://aa.stanford.edu/~ssdl/</FONT></A><BR><FONT =
face=3DArial=20
size=3D2>> <BR>> These guys are trying to get to where they =
can turn a=20
satellite into a<BR>> senior thesis project for a student. =
(I don't=20
think they've gotten it<BR>> down to a year yet, though.) =
Basically=20
they're working on the level of<BR>> re-inventing Sputnik. =
Amazing=20
stuff, amazingly simple, teaches people a<BR>> bunch. Way =
below the=20
level of sophistication I have to aim for,<BR>> =
unfortunately. I'm=20
told some of their electronics parts come from Radio<BR>> =
Shack! =20
:-)<BR>> <BR>> -- While getting too cold probably isn't an =
issue,=20
COOLING certainly is.<BR>> As a few people have alluded to, =
cooling in=20
space becomes an issue because<BR>> there's no air. This =
will be a=20
problem much earlier, because we'll<BR>> evacuate the payload =
several=20
hours before launch. If there's a delay, the<BR>> package =
could=20
wind up sitting on the launch rail for a few days under<BR>> =
vacuum. I've=20
worried about blowing the top off the CPU from the heat. =
I<BR>>=20
imagine it'll probably have to be heat-sunk to the chassis in some=20
manner.<BR>> Someone mentioned using a 486; that's not such a bad =
idea. Mostly I'm<BR>> just grabbing data from the RS-232 =
ports and=20
stuffing it to disk, so I'll<BR>> probably wind up doing some=20
experimentation to see just what I'll need.<BR>> <BR>> =
<BR>>=20
Thanks,<BR>> <BR>> Brian<BR>> [Reporting in from =
Japan]<BR>>=20
<BR>> <BR>> <BR>> To Unsubscribe: send mail to </FONT><A=20
href=3D"mailto:majordomo@FreeBSD.org"><FONT face=3DArial=20
size=3D2>majordomo@FreeBSD.org</FONT></A><BR><FONT face=3DArial =
size=3D2>> with=20
"unsubscribe freebsd-hardware" in the body of the message<BR>>=20
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