Date: Mon, 4 Dec 1995 14:20:43 +0000 () From: Michael Smith <msmith@atrad.adelaide.edu.au> To: jkh@time.cdrom.com (Jordan K. Hubbard) Cc: dgy@rtd.com, freebsd-hackers@freefall.freebsd.org Subject: Re: No Thumbs??? (lack of concensus) Message-ID: <199512041420.OAA26356@genesis.atrad.adelaide.edu.au> In-Reply-To: <5032.817955015@time.cdrom.com> from "Jordan K. Hubbard" at Dec 2, 95 05:43:35 pm
next in thread | previous in thread | raw e-mail | index | archive | help
Jordan K. Hubbard stands accused of saying: > > > Ack! So, given they have their own little home (a full height 5" > > external enclosure), is the "typical" 60W supply going to cut the mustard? > > Guess I don't know how long the powerup transients are and how much extra > > reserve these little supplies have up their sleeves. > > Here's the rule of thumb: > > If dropping the transformer for the PS on your foot from waist height > would break your foot, then the PS is big enough. :-) I have a set of E-cores (phillips I think) from a 750W 5V PSU kicking around in a drawer here somewhere. The whole assembly, including windings and frame, probably weighed about a kilo. Unless you have osteoperosis, this may bruise but not break. 8) To answer the original question; a 60W switching supply will run a single 30W 5.25" drive. It will _not_ run two of them, although it might look like it will for a while. > Jordan -- ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ ]] Genesis Software genesis@atrad.adelaide.edu.au [[ ]] High-speed data acquisition and (GSM mobile) 041-122-496 [[ ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ ]] "Who does BSD?" "We do Chucky, we do." [[
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199512041420.OAA26356>