Subject:
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Re: External power supply ?
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 12 Jan 2004 06:06:57 GMT
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Viewed:
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1742 times
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In lugnet.robotics, Philippe Hurbain wrote:
> Hello Ilja,
> >
> > Is there anyone here that has some info on how i can get my rcx version
> > 2.0 to work with an external power supply?
>
> Here is the method that I used in my motors tests
> (http://www.philohome.com/motors/motorcomp.htm), that require no modification to
> RCX: use two fake batteries assembled from the sawed ends of old alkaline
> batteries, maintained at the right spacing with rods of hot melting glue.
>
> See http://www.philohome.com/motors/fake-batt1.jpg and
> http://www.philohome.com/motors/fake-batt.jpg.
>
> These fake batteries are connected to a regulated 9V power supply (red wire
> connected to +)
>
> And of course...
> Caution: I shall not be held responsible if you burn your RCX with incorrect
> voltage or bad polarity
> Caution2: batteries contain hazardous chemicals that can be dangerous for your
> health. Open them at your own risk and only if you know what you are doing!!!
>
> Philo
Philo,
I want to attempt the conversion to an external power source. I have looked at
your page but I have a few questions. Please forgive me that I know next to
nothing about electric power and electronics -- or so it seems.
- Your regulated power supply was able to put out 9v.. at what m/A is
recommended for the RCX 2.0?
- I see "regulated" wall-warts listed at radio shack. Would one of these
suffice?
- In another lugnet posting on this topic, a fellow used a voltage regulator
7809 or 7805. Is this necessary only if using an unregulated dc supply?
- I would still have the issue of having to program once powered by the adapter.
Is there some way to have batteries in it and have it switch. I want to run
some atuomation at a train show and don' have a working laptop.
Thanks
ken
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Message has 2 Replies:
 | | Re: External power supply ?
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| Hi Ken, (...) Maximum RCX power consumption is 1500 mA (there is a fuse inside rated 1.5A). Anything rated at least 1A should be OK. (...) They should, if they are really regulated (some cheap warts advertised as regulated are not so good...). A (...) (21 years ago, 12-Jan-04, to lugnet.robotics)
| | | Re: External power supply ?
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| "ken koleda" <kkoleda@co.wayne.mi.us> wrote in message news:HrD4zL.1sEF@lugnet.com... <<snip>> (...) looked at (...) to (...) regulator (...) adapter. (...) run (...) Hi Ken, I have been using a Radio Shack Cat #273-1772 with good results. It is a (...) (21 years ago, 15-Jan-04, to lugnet.robotics)
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Message is in Reply To:
| | Re: External power supply ?
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| Hello Ilja, (...) Here is the method that I used in my motors tests ((URL) that require no modification to RCX: use two fake batteries assembled from the sawed ends of old alkaline batteries, maintained at the right spacing with rods of hot melting (...) (21 years ago, 25-Nov-03, to lugnet.robotics)
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