test-drb July 2006

test-drb@ccmp.vtda.org

204 participants
377 discussions

by rcini＠optonline.net

All: If anyone is looking for a very simple, temperature-dependent fan speed control, check this out: http://www.heatsink-guide.com/content.php?content=control.shtml It uses a 10k pot, NTC thermistor, MOSFET and 12v fan. I just built one using a 40mm Sunon fan for a small SBC enclosure and it works great. All parts (except the fan) are available from Radio Shack and cost about $7. Rich Rich Cini Collector of classic computers Lead engineer, Altair32 Emulator Web site: <http://highgate.comm.sfu.ca/~rcini/classiccmp/> http://highgate.comm.sfu.ca/~rcini/classiccmp/ Web site: http://www.altair32.com/ /***************************************************/

17 years, 10 months

Microfilm scanning - film scanners?

by philpem＠philpem.me.uk

Hi, I've been skimming the recent threads on microfiche scanning with some interest. Just out of curiosity, has anyone tried scanning microfilm/microfiche with a film scanner? Just interested, because VueScan (free trial from www.hamrick.com, $50 for the basic licence, $90 for the 'professional' licence) seems to have a setting for microfilm scanning. Unfortunately I don't have any microfilm to try it out, but my film scanner (a Minolta DiMAGE Scan Dual IV) only takes mounted 35mm slides and 35mm strip film, so anything I put in would have to meet those size constraints... I could (in theory at least) bodge up a cardboard carrier for my flatbed scanner (an Epson Perfection 2400 Photo) and use that, but I don't rate its optical quality for transparency film very highly. I was just curious if anyone had considered trying it... I'd love to but like I said, I haven't got any film to test with. -- Phil. | Kitsune: Acorn RiscPC SA202 64M+6G ViewFinder philpem at philpem.me.uk | Cheetah: Athlon64 3200+ A8VDeluxeV2 512M+100G http://www.philpem.me.uk/ | Tiger: Toshiba SatPro4600 Celeron700 256M+40G

17 years, 10 months

Stumper: What computers are these?

by sethm＠loomcom.com

Alright, I admit it. I'm stumped. BBC has a series, "Look Around You", a comedy program based on late 1970s and early 1980s educational programming. Season two included an episode called "Computers", and featured these two fake "home computers". The Bournemouth ("The most powerful computer in Britain"): http://www.bbc.co.uk/comedy/lookaroundyou/wallpaper/images/1600/ bournemouth.jpg The Petticoat 5 ("The first computer designed just for women"): http://www.bbc.co.uk/comedy/lookaroundyou/wallpaper/images/1600/ petticoat.jpg I assume that these are genuine British classic computers that the producers painted and re-badged for television. But what are they? -Seth

17 years, 10 months

Compaq Portable III

by reevejd＠mchsi.com

Hello All. I have a Compaq Portable III (286) that is functioning fine, except that the clock loses time (it seems to basically stop) if the machine is off more than an hour. It does remember its setup information, however, and there are no error messages during boot-up. I imagine it needs a new battery - where would I find one for such an old machine? The battery does hold a charge for at least some time, according to my meter readings, so maybe it isn't the battery? Thanks for any help. John R.

17 years, 10 months

Root password on solaris 5.7?

by compoobah＠valleyimplants.com

> Solaris 9 is the last version to run on all 64-bit Ultras; Solaris 10 is >very impressive from a networking and virtualization standpoint (plus >ZFS kicks some serious ass) and is what you should be running if at all >possible. So where's your line between 9 and 10? I just moved from a U1 200E to a U10 333, and I stuck with 5.9 because I was concerned about usability on the U10. >All other versions can hit the road for all I care (unless >you need BSD SunOS 4.x for 1980s hardware). 4.1.1_U1 is definitely the one to use for Sun3, but I like 4.1.4 on my IPX (Sun4c) as well. Never tried 2.5.1, but 2.6 was very slow.

17 years, 10 months

Vector Imagery

by lee＠geekdot.com

> What I really would like to find is a formula for calculating R2R > ladder values so that I could get a 0V-5V output from an 8-bit > parallel port. Constructing it is easy, once one knows what > resistors to pick. The output impedance of an R2R ladder is R so you chose R to suit the stage the ladder will drive. You won't get 0V-5V without some sort of amplifier on the output, even using CMOS gates to drive the ladder. For a more monotonic output 2R should really be 2R-Rout where Rout is the output impedance of the driving gate. Lee.

17 years, 10 months

Fake email addresses (was Re: Why do people keep stealing my work)

by vp＠drexel.edu

> I like to do a similar thing with online forms that require your name and > email. I create a throwaway email address and then make up a name and > address. I'm still getting spam offering really great mortgage rates to > someone called David Marquez in Juneau. But I never did get anything for > Consuelo O'Brien of Barrow. You can do even better than that, by creating rules to automatically handle incoming email according to the destination address. See "Fighting Spam by Encapsulating Policy in Email Addresses", by John Ioannidis www.isoc.org/isoc/conferences/ndss/03/proceedings/papers/1.pdf **vp

17 years, 10 months

Livermore Swapmeet

by marvin＠rain.org

It looks like I'll be heading up to the Livermore Swapmeet tomorrow (Sunday). If you are there, stop by and say hi :)! I'll have mostly electronic/transmitter hunting stuff, but the last time I was there (2005 VCF), it had some interesting stuff. I'm told it used to be a good spot for picking up classic computer related "stuff"! Marvin, KE6HTS

17 years, 10 months

looking for info on the NCR Datamate

by chrism3667＠yahoo.com

Not the Decision Mate, something that probably came out after it, yet before the PC4/i. They all basically have the same appearance. I was talking to a former employee of NCR and she told me that less then 3000 were made. It was intended (says she) to be networked with the Decision Mate or something, and share some of it's resources maybe. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

17 years, 10 months

Airflow in drive case

by rcini＠optonline.net

All: I'm replacing the fans in a dual 8" drive case. The case has two distinct sections - the drive side and the power supply side - each with a fan. On the power supply side, air is being pulled through the case and out the back through a filter. On the drive side, the fan is the blowing in, with no filter. The cover does not have any ventilation holes. It appears that the fan on the power supply side is original but the other one was installed later (based on the wiring and the model of fan). Should the orientation of the fan on the drive side be changed? I would think that cool air (although unfiltered) should be pulled through the front of the drives and out the back. Thoughts? Rich Rich Cini Collector of classic computers Lead engineer, Altair32 Emulator Web site: <http://highgate.comm.sfu.ca/~rcini/classiccmp/> http://highgate.comm.sfu.ca/~rcini/classiccmp/ Web site: http://www.altair32.com/ /***************************************************/

17 years, 10 months

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test-drb July 2006