HP Forum Archive 20

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[OT] Casio PRISM Current Draw? Message #1 Posted by Tim Wessman on 28 Apr 2011, 7:00 p.m. Has anyone seen/taken any measurements of the Prism at both idle and running? Different brightness levels? TW

Re: [OT] Casio PRISM Current Draw? Message #2 Posted by hugh steers on 28 Apr 2011, 8:44 p.m., in response to message #1 by Tim Wessman i'll do some...

Re: [OT] Casio PRISM Current Draw? Message #3 Posted by hugh steers on 28 Apr 2011, 9:05 p.m., in response to message #2 by hugh steers ok, some quick results are: max current when calculating (also on initial power up) = 30ma. sitting in the main (color) menu = 11ma. idling in the calculator (main app) = 7ma [why this is less than when on the main menu, not sure. unless the brightness is slightly different here]. when screen goes dim = 3ma one other thing is that the current draw seems to fluctuate by about 1.5ma all the time. not sure why. my numbers above are averages.

Re: [OT] Casio PRISM Current Draw? Message #4 Posted by Tim Wessman on 29 Apr 2011, 12:37 a.m., in response to message #3 by hugh steers Interesting numbers. Thanks for that. I've been curious since it came out. TW

Re: [OT] Casio PRISM Current Draw? Message #5 Posted by Joerg Woerner on 29 Apr 2011, 8:15 a.m., in response to message #4 by Tim Wessman I expected that you did these measurements at HP already in December 2010 ;-)) Cheers, Joerg

Re: [OT] Casio PRISM Current Draw? Message #6 Posted by Tim Wessman on 29 Apr 2011, 10:14 a.m., in response to message #5 by Joerg Woerner Nope. Just personal interest is all. Speaking of which, how about some inspiring CX numbers? :-) TW

Re: [OT] Casio PRISM Current Draw? Message #7 Posted by Joerg Woerner on 29 Apr 2011, 12:55 p.m., in response to message #6 by Tim Wessman Tim, These were pre-production models and I had to sign a NDA that I don't open the units or do any kind of reverse engineering. I sent them back to Dallas a few days ago. Regards, Joerg

Re: [OT] Casio PRISM Current Draw? Message #8 Posted by Tim Wessman on 29 Apr 2011, 2:04 p.m., in response to message #7 by Joerg Woerner Well, how about on just any other nspire model? I don't think I've seen power readings on that either. TW

Re: [OT] Casio PRISM Current Draw? Message #9 Posted by Joerg Woerner on 2 May 2011, 7:55 a.m., in response to message #8 by Tim Wessman Tim, Give me a few days - it is not that easy. The connection of the two 3V strings to the PCB isn't that straight forward. Regards, Joerg

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