I feel your pain, Ivar... The problem is that most people on this list are not hardware engineers... :p
The question is how regulated that 12V needs to be before it hits the SunRay. Here's an experiment for you all: take any regular linear power supply (not regulated) and stick a multimeter on it. You'll notice that the voltage you measure is higher than what it's rated: it'll say 9V, but it measures (unloaded of course) around 12V. Put a load on it, and the voltage will fluctuate. So, if the component cares about a precise voltage, it's doing some internal regulation. The question here is what the bounds on that internal regulation are... Now, the SunRay powersupply is of the switching variety, which will ensure it stays a lot closer to 12V than a plain old linear. The SunRay engineers may have put in little on-board regulation with this in mind, or they may have put in something that can handle a few volts over (or under). Personally, I'd be surprised if it couldn't handle 15V peaks, but this question needs to be answered either by a SunRay engineer or by someone who has taken apart a SunRay and can identify the power supply regulator part number... Anthony -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jason Winningham Sent: August-06-08 7:05 AM To: SunRay-Users mailing list Subject: Re: [SunRay-Users] Re: Sun Ray on my boat On Aug 5, 2008, at 4:27 PM, Sridhar Ayengar wrote: > Ivar Janmaat wrote: >> Its such a waste of time to revers engineer power specs..... > > The voltage and polarity you can get with a simple multimeter. I > doubt you even need to know the current requirements, as you're > probably going to overspecify it by a wide margin, right? It's not even that complex - the sunray2 power supply on my desk says "12V 2.5A" and a figure indicating center positive on the label. I'm gonna go out on a limb and say you need 12V and 2.5A. (: -Jason ---------------------------------------- Jason Winningham Computer Systems Engineer College of Engineering The University of Alabama in Huntsville http://support.eng.uah.edu/ http://www.eng.uah.edu/~jdw _______________________________________________ SunRay-Users mailing list [email protected] http://www.filibeto.org/mailman/listinfo/sunray-users _______________________________________________ SunRay-Users mailing list [email protected] http://www.filibeto.org/mailman/listinfo/sunray-users
