Subject:
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Re: RCX infra red sensitivity
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 20 Jul 2006 22:27:40 GMT
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Reply-To:
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danny@IHATESPAMorionrobots.co.uk
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Viewed:
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3084 times
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On 20/07/06, Eric Wijnsouw <sgtpeppermail@yahoo.com> wrote:
> Thanks for your replies.
> Both are RCX2 and I use the Robolab software.
> In Administrator / RCX settings you can set the RCX IR-power setting to high or
> low, but both were already in high.
> After some testing I found out that the main problem are the batteries.
> One RCX uses rechargeable batteries while the other uses normal batteries.
> Normal batteries give the stronger signal. When I swap the batteries the problem
> moves to the other RCX.
> Also I found out that IR light travels better in a dark environment.
>
> Eric
Depending on the kind of rechargeables you are using, they generally
have significantly different characteristics. They also often output a
slightly lower voltage (about 1.2 or 1.3v per cell as opposed to the
expected 1.5). If you have a multimeter, put it across one of each
kind, and you will see what I am talking about. There are ways to make
circuits cope with rechargeables, but toy manufacturers often do not
bother.
Beware - this is a serious warning, as the RCX deals with motor
output, rechargeables can behave differently current wise from
non-rechargeables, and this may increase the likelyhood of burn outs
or damaged components when motors are stalled.
Danny
--
Danny Staple MBCS
OrionRobots
http://orionrobots.co.uk/blogs/dannystaple
(Full contact details available through website)
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Message has 1 Reply:
 | | Re: RCX infra red sensitivity
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| Hi Danny, (...) Have you seen real failures using some rechargeables batteries? I believe that the RCX motor driver IC is really foolproof, and I don't think anything could be destroyed using various kind of batteries (provided that the 9 or 10 (...) (18 years ago, 21-Jul-06, to lugnet.robotics)
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Message is in Reply To:
| | Re: RCX infra red sensitivity
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| (...) Thanks for your replies. Both are RCX2 and I use the Robolab software. In Administrator / RCX settings you can set the RCX IR-power setting to high or low, but both were already in high. After some testing I found out that the main problem are (...) (18 years ago, 20-Jul-06, to lugnet.robotics)
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