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Rockbox mail archiveSubject: Charging FMR via hardwareCharging FMR via hardware
From: Fred <speed-up_at_fr.st>
Date: Sat, 27 Sep 2003 18:22:36 +0200 As I got a problem with flashed rockbox firmware on my FMR, the software cannot boot up to charge my device : I've got to do this manually. Could someone please help me doing that, giving me the voltage/intensity settings to charge the battery ? Now both cells are about 3.3V which seems to be insufficent to spin up disk, required (don't know why ...) by rockbox's charging process, which definitly doesn't work. I suppose the charging circuit would be like this, with U being the power sypply's voltage, B1 and B2 both battery cells and R a resistor, chosen to control intensity : --------|(+) U (-)|-------- | | | | | (R) | | | | --------|(+) B1 (-)|------- | | --------|(+) B2 (-)|------- Just tell me if that circuit may work, and which values I need for R and U, how long this would be, and if there are some issues I'd have to know about LiIon batteries. For information, the values written on the cells are : Archos - 2 Lithium-ion rechargeable batteries 2200 mAh - 4.2 V Fred Received on 2003-09-27 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |