<div dir="ltr"><div><div><div>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.<br><br></div>I have a 3.5 or 4Amp unit now, but I've not tested it yet.<br><br></div>I don't think you can power the Flotsam with an SSD (or any form of Disk) on less than 3 Amps.<br><br></div>Scott<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Mar 26, 2015 at 12:07 PM, David Byte <span dir="ltr"><<a href="mailto:dbyte@suse.com" target="_blank">dbyte@suse.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Good advice Ken.<br>
<br>
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.<br>
<br>
Thoughts of using this: <a href="http://www.mouser.com/ProductDetail/Mean-Well/HSP-250-5/?qs=sGAEpiMZZMsPs3th5F8koANcuRqubmL6N%252bynPk%252b952k%3d" target="_blank">http://www.mouser.com/<u></u>ProductDetail/Mean-Well/HSP-<u></u>250-5/?qs=<u></u>sGAEpiMZZMsPs3th5F8koANcuRqubm<u></u>L6N%252bynPk%252b952k%3d</a> and breaking it out to the 16 device plugs?<span class="im HOEnZb"><br>
<br>
<br>
David Byte<br>
Sr. Technology Strategist<br>
Alliances and Integrated Systems<br>
SUSE<br>
<a href="mailto:dbyte@suse.com" target="_blank">dbyte@suse.com</a><br>
(P)<a href="tel:918.528.4422" value="+19185284422" target="_blank">918.528.4422</a><br>
<a href="http://www.suse.com" target="_blank">www.suse.com</a><br>
<a href="https://www.suse.com/partners/integrated-systems/" target="_blank">https://www.suse.com/partners/<u></u>integrated-systems/</a><br>
<br></span><div class="HOEnZb"><div class="h5">
On 3/26/2015 9:50 AM, Ken Tait wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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.<br>
<br>
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.<br>
This allows the supply to come up to voltage before turning on the Max.<br>
<br>
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.<br>
<br>
Hope this helps<br>
Ken<br>
<br>
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