Subject:
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Re: MOC: Working solar powered rover and geiger counter
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 10 Feb 2006 20:34:04 GMT
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Viewed:
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2091 times
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In lugnet.robotics, Justin Fisher wrote:
> > Do you have documentation... for the energy cans?
>
> the heart is four really really high density capacitors, the ones
> I use are 10F 2.3V.
Wow, why do I think this has the potential for extreme pain? In any case, I'm
very interested in anything you can provide for the rest of us. You've done some
really nice work, that the rest of us would now like to copy :-).
> There is also NASA-style end of the silicon cell range, which have
> an efficiency edge over the rest.
That's probably due to either being multi-layered, or a different junction
type, as well as having fewer defects (scattering electrons is bad for
efficiency).
> These are nearly black (which I assume means the capture more
> light, since they're reflecting less :).
Buy one or two and test. Solar cell efficiency drops sharply with
temperature, so dark-colored cells might not help as much as the spec says
(seeing as how all the specs are for ideal situations like "20 deg-C"). When you
run these under those Halogen lights, they're going to get really warm very
fast, which may drop their efficency so much that practically you don't get any
more out of them.
> since I'll probably want to build something for the NXT system,
> and every bit helps :)
Absolutely. For one thing, there's the question of what the power
requirements on the NXT will be (as well as those motors) - I hope they're
lower, but I'm not counting on it. Hopefully the MUPs have reverse-engineered
their toys enough to help :-).
--
Brian Davis
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Message has 1 Reply:
 | | Re: MOC: Working solar powered rover and geiger counter
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| (...) I have a schematic somewhere, so I'll add that to a page and write up some other info to the website when I get a chance (which will probably not be for a few days). (...) That's a very good point. (I've always designed for sunlight, where (...) (19 years ago, 10-Feb-06, to lugnet.robotics)
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Message is in Reply To:
| | Re: MOC: Working solar powered rover and geiger counter
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| (...) This would not be difficult - if you scroll down to the bottom schematic, it is colour-coded into sections according to function, with the last third of the circuit being all that you need to make a switch to activate and run the RCX from some (...) (19 years ago, 10-Feb-06, to lugnet.robotics)
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