i.MX515 Project Elliptic Curve Cryptography (ECC) in category Embedded proposed by Johan Dams on 1st February 2009 (accepted on 1st June 2009) [View Full Project]

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	Power Efficiency posted by Johan Dams on 20th July 2009 As some might remember, we posted some power usage statistics of the EFIKA 5200B a few years back, e.g., here: http://bbrv.blogspot.com/2006/12/opportunity-meets-preparation.html and here: http://www.powerdeveloper.org/forums/viewtopic.php?t=1039 and also here: http://www.powerdeveloper.org/forums/viewtopic.php?p=12563 Time to do the same for the Efika MX :-) This is the first one: This is for the board and screen - but no wireless. A quick calculation (P=UxI) tells us it consumes around 5.9 Watts. This second picture: shows the board + screen + wireless. Power consumption is around 6.5 Watts. This last one: shows the board with wireless, but without the screen, consuming barely 4 Watts. And this brings us to an interesting fact: even though the clock speed of this little board is twice as high as the original Efika, power consumption is, for the bare board, about the same. On the other hand however, as soon as we add a display, the power consumption is about half of that of an an original Efika with a graphics card (and no display, or wireless)! In other words, this clearly shows some of the technological developments that have emerged in the past years, especially in the field of power efficiency. Johan.