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Rockbox mail archiveSubject: real vaules: 8 MB version has 15-30% longer runtime!real vaules: 8 MB version has 15-30% longer runtime!
From: Uwe Freese <mail_at_uwe-freese.de>
Date: Fri, 24 Jan 2003 02:45:06 +0100 Hello, I've now measured the battery consumption with my 8MB-modified AJB Recorder20. The mod has much more influence on battery consumption than I thought! current CVS version, compiled without demos and without games, 1.726 / 7.726 MB free, measured about 600 values/s with a 10 BIT A/D on serial port, measured one buffer cycle. 128 kbit/s, 2 MB used, avg. 131,4 mA 256 kbit/s, 2 MB used, avg. 179,2 mA 128 kbit/s, 8 MB used, avg. 113,7 mA (15,6% longer runtime) 256 kbit/s, 8 MB used, avg. 136,1 mA (31,6% longer runtime) PS: The values are not precise absolutely. There's a factor in it that I set manually and approximated the value my multimeter showed. But the relative differences should be precise. You can have a look at plots at www.uwe-freese.de/rockbox/8mb_ram_en.html There's also a funny graph that shows the disk power cunsumption when reading (note: it shows the overall current, not only the current from the disk!): www.uwe-freese.de/rockbox/hdd_activity.gif You can see some "platforms", that seem to be the current the disk consumes for some activity (e.g. "reading" "be spinned up"). Bye, Uwe. Received on 2003-01-24 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |