Subject:
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Re: Solar-powered RCX?
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 9 Nov 1998 22:09:45 GMT
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Viewed:
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2940 times
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I think the RCX will use which ever supply voltage is greater. I havn't
tested this, but I'll bet that when you plug the AC adapter into the RCX when
the AC adapter is not even plugged into the wall the RCX will still work.
This means there isn't a mechanical bypass switch built into the RCX's power
receptacle. You could measure the current on the external supply and
determine if it is running the RCX or not.
Kekoa Proudfoot wrote:
> > Is there any easy way to tell when the RCX is uing the enternal power
> > supply? I tried using an external power adapter for testing, but
> > couldn't see and visual display on the LCD to show it was using external
> > power.
>
> No, there is no way to tell as far as I know. I believe the choice of
> power source is done by circuitry, not logic.
>
> I do believe that the external power supply is used in preference to the
> batteries, but this might not really be the case - you might still drain
> the batteries somewhat even if you have if you have an external power
> supply. At least, I left my RCX plugged in with batteries, and I believe
> my batteries eventually needed replacing, even though I almost exclusively
> used the external power supply.
>
> -Kekoa
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Message has 1 Reply:
 | | Re: Solar-powered RCX?
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| (...) I'm almost positive that the RCX uses whichever is greater, within a diode drop somewhere. But even still, I imagine that there is some leakage current from the batteries. Or maybe I was imagining that, and my batteries did not really drain. (...) (26 years ago, 9-Nov-98, to lugnet.robotics)
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Message is in Reply To:
| | Re: Solar-powered RCX?
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| (...) No, there is no way to tell as far as I know. I believe the choice of power source is done by circuitry, not logic. I do believe that the external power supply is used in preference to the batteries, but this might not really be the case - you (...) (26 years ago, 9-Nov-98, to lugnet.robotics)
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