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Rockbox mail archiveSubject: Re: Shamingly obvious question about NiMH vs NiCad chargersRe: Shamingly obvious question about NiMH vs NiCad chargers
From: George Michaelson <ggm_at_apnic.net>
Date: Tue, 26 Nov 2002 11:30:58 +1000 On Mon, 25 Nov 2002 18:45:45 -0600 gerald clark <gerald_clark_at_mindspring.com> wrote: > The current rating on a DC power supply is the maximum current that can > be supplied without exceeding allowable ripple in the output. > It is not a current limiting specification, but a current supplying > specification. > You may use less than the rated current, but you can not use more > without risking damage to the equipment being powered. > So when I tried to run my device on a 9v/300ma rated DC plugpak, I was in dangerous ground. Ok. I won't try that again! > George Michaelson wrote: > > God, how embarrassing not to know these things. > > > > If one owns an older tandy (blush) NiCad charger, is this 'safe' to use to > > re-charge NiMH or are they radically different and require a different > > charger and current? > > > > Also, I spoke to a source of AC/DC plugpacks yesterday and he was pretty > > adamant that the current limiting requirement to 600ma from the 9v pack or > > 1.2a from the 12v pack was meaningless, it was the device which determined > > how much current was drawn. I didn't buy this, but also I don't > > *understand* this area. > > > > I'm not an electrical engineer. I don't even play one in Soap Operas. I > > don't intend risking my device either, so I'm sticking to my US charger in > > a 240v->110v stepdown unit until I can get a regulated 9v/600ma DC block. > > I tried one rated to 300ma, it didn't charge, but it does trigger the > > poweron behaviour of the volts-in, I guess thats a mechanical switch > > right? > > > > -George > > > > > -- > Gerald L. Clark > > Aero TerraTrike #1 > http://www.wizwheelz.com/images/clarkaerotrike1.jpg > > Member: Sky Soaring > > Illinois, U.S.A. Received on 2002-11-26 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |