Subject:
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RE: Voltage generator
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 18 Jan 1999 09:35:06 GMT
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Original-From:
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Paul Curtis <plc@SPAMLESSrowley.co.uk>
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Viewed:
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1323 times
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Stuart,
Like yourself I was interested in prices for sensors and other add-on
bits. I've found that Commotion deal in Dacta parts and will accept
orders from all and sundry. So I asked for their catalogue and was
happy when it arrived (how many times have you asked for something which
doesn't arrive?)
Here are sensor prices:
Touch sensor: £13.99 (2x4 brick, unlike Mindstorms sensor)
Temperature sensor: £21.49
Light sensor: £21.49
Angle sensor: £21.49
Also:
DC Sound element: £6.99
DC Lamp x 3: £16.49
RCX (9709): £74.99
Robolab software: £18.49
Lego CAD: £62.49
I was astounded by these prices. Surely three touch sensors can't cost
1/2 the price of a Mindstorms kit? What's even more telling is that the
cost of one-off motors and such in the catalogure are almost as
expensive as buying a retail pack (which has battery boxes, gears, and
the like). For instance, an RCX and an IR tower with the Robolab
software bundled (no other building pieces) costs £149.99 -- better to
purchase a retail Mindstorms kit at £159.95 IMO. And you don't want to
ask about the cost of the stuff with Interface B or the Control Centre.
I browsed the price list looking for some parts that I need to replace
(pneumatic handpump, for instance), and some of them are cheaper in the
Commotion catalogue than from Lego spares. Also, it's useful for geting
special parts -- I'd like the conveyor belt elements, so I'll buy those
as I've not seen them elsewhere.
Anyway, Commotion are on 01732 773399.
> -----Original Message-----
> From: S. Crawshaw [SMTP:sc10003@eng.cam.ac.uk]
> Sent: Sunday, January 17, 1999 4:13 PM
> To: lego-robotics@crynwr.com
> Subject: Re: Voltage generator
>
> On Sat, 16 Jan 1999, Bill Leggett wrote:
>
> > can. If you connect the two power wires together from two motors and
> > spin one motor, the other motor spins! The first is obviously • generating
> > DC voltage in proportion to speed. This could be a poor mans
> mechanical
>
> Hurrah. You've discovered the dynamo :-)
>
> No, seriously, there is one possible application: speed sensor. But I
> expect the "offical" rotation sensor is probably better for that in
> nearly
> all cases? On the other hand, the motor is (sometimes) slightly
> cheaper...
> hard to tell since I haven't yet found a UK price for sensors.
>
> Stuart
>
> --
> Did you check the web site first?: http://www.crynwr.com/lego-robotics
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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