Subject:
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RE: Don't use Lithium-Ion batteries
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 3 Aug 1999 21:22:36 GMT
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Original-From:
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Tilman Sporkert <TILMAN@ACTIVESWnomorespam.COM>
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Viewed:
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1104 times
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Please note that in this particular case, the RCX is reported to still work
with the internal batteries. That means the fault is somewhere in the path
from the external connector to the main power "bus" within the RCX. Some
component that is only used with the external power supply is probably
damaged. I suspect that there isn't much more than the connector and a
bridge rectifier that falls into this category. So either the bridge
rectifier got burned out by an overcurrent situation, or quite simply, the
connector doesn't work anymore. Maybe a piece broke off in the connector, or
there's a bad solder joint on the circuit board.
Tilman
> From: Issac Merkle <the_gaff@hotmail.com>
> > The more I think about it, it may be a NiMH pack, rather than • Li-Ion. I'll
> > have to check.
>
> Note that both NiMH and Li-Ion can put out much higher currents then
> alkaline cells (alkaline cells have a high internal resistance).
> Could this
> person have shorted across the output somehow? That would
> probably blow the
> motor controller because it would run more current through the controller
> then the controller could deal with.
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 1 Reply:
 | | Lithium-Ion batteries are innocent!
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| (...) I think you will find that the bridge rectifier is in the internal battery circuit also, as the type of power socket used normally has only a single pole normally closed switch to disconnect the battery. I would suspect either the power (...) (25 years ago, 4-Aug-99, to lugnet.robotics)
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Message is in Reply To:
| | Re: Don't use Lithium-Ion batteries
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| From: Issac Merkle <the_gaff@hotmail.com> (...) Note that both NiMH and Li-Ion can put out much higher currents then alkaline cells (alkaline cells have a high internal resistance). Could this person have shorted across the output somehow? That (...) (25 years ago, 3-Aug-99, to lugnet.robotics)
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