Thanks, I already feel much better.... I also wouldn't be suprised if the Sun ray can handle voltage range of 10 to 15 Volts without problems. All hardware is designed to handle power fluctuations around the specified Voltage (12 Volts). I have taken apart a Sun Ray 2 to look for the voltage regulators and found some made by philips however I could not find the specifications of them yet. The 270 I did not try to dismantel yet because the tft screen might complicate things a bit.
Ivar > 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 > _______________________________________________ SunRay-Users mailing list [email protected] http://www.filibeto.org/mailman/listinfo/sunray-users
