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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This is a multi-part message in MIME format. ------=_NextPart_000_000A_01BFDE00.DBFB29A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 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 ------=_NextPart_000_000A_01BFDE00.DBFB29A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META content=3D"text/html; charset=3Diso-8859-1" = http-equiv=3DContent-Type> <META content=3D"MSHTML 5.00.3017.2400" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <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 </FONT></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML> ------=_NextPart_000_000A_01BFDE00.DBFB29A0-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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