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Subject: Re: FM Recorder power level - patch attached
From: Justin Heiner (
Date: 2003-02-05

Unfortunately, it seems as if that doesn't work. I tried it and it powers off immediately. I even tried booting it up with the power in, waiting a bit, and then disconnecting it, and it still turns right off


>I have made a temporary fix for the power problem on the FM Recorder
>model. This is along the same lines as the one that Fred posted recently
>(ignoring the battery min level completely), but is not quite so severe!
>It works on the principle that the battery level reads as 0.00 or 0.01
>volts (0 or 10 in the internal scale used) for much of the time, and
>occasionally shows the correct value. The fix keeps an extra value of
>"last known good" for the battery level, and uses this instead whenever a
>zero value is read. It uses a threshold value, currently 20 (0.02 volts),
>to check whether a "bogus" value is returned, and uses the last known good
>value if it is bogus (i.e. < 20). If a "good" value is read, it updates
>the known good value. In normal circumstances, I doubt the batteries could
>put out 0.02 volts and the jukebox fire up, so this principle seems sound!
>A patch is attached below, and a compiled firmware is uploaded at
>The patch is also available at
>Happy testing!
>Mike Holden

Page was last modified "Jan 10 2012" The Rockbox Crew