Subject:
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RE: Custom Firmware, IR Problems, and Dead RCXs (long)
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 27 May 2001 18:07:33 GMT
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Viewed:
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513 times
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Andy Gombos wrote:
> Oh, geez, this could be bad. Could changing the firmware to reduce comm
> activity fix this? It seems to be a problem of usage, not specific
> firmware properties (i.e. constant data uplaoding.)
Well, yes and no. The biggest risk is when you use the tower or
the RCX in high-power (far) mode for extended transmissions.
I was thinking about why we have not received more posts about
dead RCXs. My old pbForths (and I think legOS too) set the default
range to low. In fact, the ability to set a high-power range was on
the wish list for the next release of pbForth.
In the process of testing my new serial routines, I managed to burn
out one tower and the RCX twice. Now, the nice folks at LEGO replaced
the tower for me, but that was before I figured out the RCX was dead
too! I'm too embarassed to ask for a replacement unit....besides, it's
easy enough for me to fix.
I'm putting a 50 Ohm resisitor in series between the IREDs on the
RCX main board to avoid future problems like this.
Any other opinions on this issue?
Cheers, Ralph Hempel
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Check out pbFORTH for LEGO Mindstorms at:
<http://www.hempeldesigngroup.com/lego/pbForth>
Buy "Extreme Mindstorms: an Advanced Guide to Lego Mindstorms"
<http://www.amazon.com/exec/obidos/ASIN/1893115844/hempeldesigngrou>
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Message has 1 Reply:
 | | RE: Custom Firmware, IR Problems, and Dead RCXs (long)
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| Hi all, Just a couple a quick comments on this thread - I'm a firmware design engineer who's done lots of work with IrDA. I don't, however, have any experience with the internals of the RCX or the IR Tower, other than owning them and reading this (...) (23 years ago, 27-May-01, to lugnet.robotics)
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Message is in Reply To:
| | Re: Custom Firmware, IR Problems, and Dead RCXs (long)
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| Oh, geez, this could be bad. Could changing the firmware to reduce comm activity fix this? It seems to be a problem of usage, not specific firmware properties (i.e. constant data uplaoding.) Andy (...) -- See my Visual Interface for leJOS at (URL) (23 years ago, 27-May-01, to lugnet.robotics)
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