I can tell you with my Flotsam with a Crucial 240GB SSD on it (with a Wireless USB Mouse and a Corded Keyboard), 2.5A didn't cut it. I could boot, but with Mint up in desktop, as soon as I did ANYTHING, the system would crash (voltage/current sag). Removing the SSD allowed flawless operation.
I have a 3.5 or 4Amp unit now, but I've not tested it yet. I don't think you can power the Flotsam with an SSD (or any form of Disk) on less than 3 Amps. Scott On Thu, Mar 26, 2015 at 12:07 PM, David Byte <[email protected]> wrote: > Good advice Ken. > > I'm looking to power a stack of up to 8 boards with Flotsam boards and > possibly up to 8 SATA 2.5" SSD drives as well. So, I am assuming I need to > be looking at about 16 devices * 2.5A each @ 5V on a good switching power > supply. > > Thoughts of using this: http://www.mouser.com/ProductDetail/Mean-Well/HSP- > 250-5/?qs=sGAEpiMZZMsPs3th5F8koANcuRqubmL6N%252bynPk%252b952k%3d and > breaking it out to the 16 device plugs? > > > David Byte > Sr. Technology Strategist > Alliances and Integrated Systems > SUSE > [email protected] > (P)918.528.4422 > www.suse.com > https://www.suse.com/partners/integrated-systems/ > > On 3/26/2015 9:50 AM, Ken Tait wrote: > >> These boards have a pretty poor power supply to keep them 'cheap'. That >> is why they require 5V in instead of 12V. All of the larger CPU's have a >> large instantaneous current draw when they turn on. This gets worse if you >> add disk drives or USB peripherals. The plug in the wall power supplies are >> poorly designed, they in fact do NOT handle this kind of surge well. If you >> get one to work, it is a random event. what you really need is a 5V at 5A >> switching supply that has a fast rise time to get this to reliably work. >> >> If you place an on/off switch in the + power supply lead and plug the >> 'plug in the wall' supply in FIRST before turning it on, you may get better >> results. >> This allows the supply to come up to voltage before turning on the Max. >> >> As for the barrel jacks, you can get them from Digi-Key or Mouser, lots >> of the surplus houses like All-Electronics also have them from time to time. >> >> Hope this helps >> Ken >> >> _______________________________________________ >> elinux-MinnowBoard mailing list >> [email protected] >> http://lists.elinux.org/mailman/listinfo/elinux-minnowboard >> >> > _______________________________________________ > elinux-MinnowBoard mailing list > [email protected] > http://lists.elinux.org/mailman/listinfo/elinux-minnowboard >
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