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.rcx
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Date:
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Sat, 26 May 2001 20:12:56 GMT
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Viewed:
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2364 times
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Ralph Hempel wrote:
> Even more interesting....
>
> I've also just replaced the IRED I replaced a few hours
> ago in my RCX :-(
>
> This time, I'm putting a limiting resistor between the
> IREDs in the RCX to keep the current within limits.
>
> The following is pure conjecture on my part...
>
> I think that they (LEGO) are using a MOSFET to drive
> the IREDs in the RCX, and depending on the RdsON of
> the part, it limits the current in the IREDs in high
> power mode (which is what I set the output too)
>
> Anyways, off to RadioShack for more IREDs....
>
> Cheers, Ralph Hempel
Maybe this is shedding some light on why LEGO removed the Power Port in
the 1.5's. To remove a known problem without dealing with it.?.?.?
Dean
--
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Vancouver Lego Club: http://www.akasa.bc.ca/vlc
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