Subject:
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Re: new Mindstorms servos?
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 20 Jan 2006 16:25:26 GMT
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Viewed:
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2710 times
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On 15/01/06, Dennis Clark <dlc@frii.com> wrote:
> In lugnet.robotics, <rcbrown@austin.rr.com> wrote:
> > John Barnes wrote:
> >
> > > "a converter cable so existing LEGO robotics sensors and motors can be
> > used with the NXT brick".
> >
> > Doh! Never mind...
>
> This does point to a concern that I have. I'm wondering if the Bluetooth
> interface replaces the IR comm link that the RCX used to send messages back
> and forth between other RCX bricks. I don't know Bluetooth so I don't know
> if it is peer-to-peer or a master/slave type of networking. It would be a
> shame to lose the ability for "bricks" to communicate with each other. It is
> also a shame that my RCX bricks will now be left out of the fun since they
> have no way to communicate with the NXT brick.
Hi Dennis,
Interesting to see you posting here too (there cant be that many
Dennis Clark aka DLC's in robotics). You will be happy to hear I am a
proud new owner of your book.
Anyway - If there is a conversion cable, I have certainly hear of
people connecting power to sensor and Vice Versa between two RCX's.
Since its you - do you know of any BT modules that link with the ooPIC
(like an I2C thing?). Now that would be really, really cool. I
certainly know of the RCX-IR to i2C board from mindsensors. Has anyone
tried using this with an ooPIC?
> BUT! The new sensor and motor connections are pretty cool, but darn it!
> Still only three motors! The sensors can probably be multiplexed for lots
> more inputs, so that is no big deal.
I thought that straight away too. There has be much mention of hoping
for more motor and sensor ports. I can understand trying to get that
many H-Bridges in the box may be awkward, although with the digital
motor protocol and "intelligent servos" I would expect all of that to
be onboard the motors. There is only so much room for connectors too,
but a good way to have dealt with that would have been to design a
piggybacking connector and an addressing based protocol.
Again the same issues as mentioned for H-Bridges apply to PWM
generators, which I wouldnt suppor the arm7 would have on board, but I
would expect that again the digital servos have those on board, and
the "digital" aspect is based upon serial data between the arm and a
smaller signal processor/generator on the motor that deals with the
PWM and the rotation sensors.
> I'm awaiting more information!
Arent we all.
--
Danny Staple MBCS
OrionRobots
http://orionrobots.co.uk
(Full contact details available through website)
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Message has 1 Reply:
 | | Re: new Mindstorms servos?
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| (...) (as you may have seen in the WIRED story) I can not possibility convey to you how much we wanted more motor ports. And we told them. Really. I mean, really, we did. We told them so often, I think we started to annoy them. Here's the problem. (...) (18 years ago, 20-Jan-06, to lugnet.robotics)
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Message is in Reply To:
| | Re: new Mindstorms servos?
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| (...) This does point to a concern that I have. I'm wondering if the Bluetooth interface replaces the IR comm link that the RCX used to send messages back and forth between other RCX bricks. I don't know Bluetooth so I don't know if it is (...) (18 years ago, 15-Jan-06, to lugnet.robotics)
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