At 19:55 -0400 09/09/2002, Compact Macs wrote: >Date: Mon, 09 Sep 2002 14:30:15 -0700 >From: Clark Martin <[EMAIL PROTECTED]>
>At 9:06 AM -0700 9/9/2002, J.S. Garrison wrote: >>> I'm looking for information on the the hard drives that shipped with the >>SE/30. >>> but what I'm looking for is the 12 >>> volt and 5 volt current requirements of those drives. >>> Gamba >>> >> >> >>You know, I've had a dozen or so in my possession over the years. >> >>I recall seeing primarily the 3/4 height Quantum drives, of either >>40 or 80MB. >>One or two were 105MB. Current required, I don't have that info. But, you can >>hook a V.O.M. to one and do an Ohm's Law to get amperage. > > >Uhm,... that won't work at all. Both the +5 & +12V lines have active >loads that are highly dependent on the applied voltage. To measure >it you would have to hook it up to +5 & +12. You can't even do it >one at a time as the 12V motors probably won't run without commands >from the 5V circuitry. Why not just hook up the ammeter in series with the 5V line, measure the current and then do the same with the 12V line? The primary problem I see is that the 12V current is likely to vary a lot depending on the activity of the drive--I guess. Or do the head positioning mechanisms run off the 5V supply? At any rate, an idle drive will draw less current than a drive under heavy usage. The manufacturer's specs would probably be best if you can get it. Jeff Walther -- Compact Macs is sponsored by <http://lowendmac.com/>. Support Low End Mac <http://lowendmac.com/lists/support.html> Compact Macs list info: <http://lowendmac.com/lists/compact.shtml> The FAQ: <http://macfaq.org/> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/compact.macs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
