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Subject:
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8475
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Newsgroups:
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lugnet.technic
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Date:
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Thu, 11 Jul 2002 02:05:24 GMT
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Viewed:
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3896 times
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8475 RC Race Buggy – A quick initial review
This is a 27 MHz remote control vehicle set. It isn’t called Technic, but it
is primarily composed of Technic parts, some new, at least to me.
The transmitter has two thumb control joy sticks, one up/down for motor
control and one side to side for steering. There are two auxiliary finger
paddles. It is 27 MHz based device which takes a standard small 9v “radio”
battery. There is a three position channel switch - more later on what this
does.
The receiver looks like the back half of a F1 or Indy style car. It sports
two 2x2 stud power connectors and has a built in steering servo with a cross
axle hole at the front to connect to the steering gear. It uses 6 x AA
battteries, so the assumption is that it is a 9 volt system.
It has rather too few mechanical connection points for my liking, making it
difficult to attach custom body work.
The interesting thing is that it relies on external motors for tractive
power. And yes – I did say motors. They are a new (to me) 9 volt motors with
built in gear reduction.in an odd enlongated package. One attaches to each
side of the rear of the receiver unit and is hinged to form part of the rear
suspension. By providing individual motor drive to each rear wheel, the
designer has avoided the issues of supplying a high torque differential.
I tested the motors running from an RCX. They work. I tested Mindstorms
motors running from the receiver module – they work too. The new motors
take ten times as much current as the Mindstorms ones do, as measured off
load at 9 volts. They are geared but to a higher final speed of 1200 rpm at
9 volts at 200mA. (Typical Mindstorms motors run 360 rpm at 9 volts at 20
mA.) There are both forward and reverse power takeoffs for application
generality.
The remote control does NOT work like a conventional 27 MHz R/C system. The
communication protocol works in a similar manner to the IR remotes used by
Bionicle Manas and 4589 RC Nitro Flash. The 27 MHz carrier is pulsed in a
short burst encoding the settings of the two joysticks and the finger
paddles. The bursts contain different address bits and have different
repetition rates depending on the channel chosen, so the main carrier
frequency of 27.145 MHz is the same for all channel settings. The
transmitted data bits use the pulse length scheme rather than the standard
async serial data standard used by Manas and Nitro Flash.
Control is pseudo proportional, there are three “values” in each direction
for the steering and three speeds in forward and reverse for power.
The standard Mindstorms type wires used to connect the drive motors connect
to the receviers main power port (2 x 2 electric plate). There is an
auxiliary port which can be used to drive “something else” like another
motor or lights or something. The two finger paddles operate this output
making it active in either forward or reverse depending upon the paddle pressed.
The steering output is connected via a cross axle to a one piece rack and
pinion unit. (I suspect this is to hold the rack system together under
impact else it would keep popping apart and severly limit “playability”. But
it does interface to the front wheel steering knuckles via standard Technic
parts. I “hit the wall” a few times while adjusting to the steering control
and nothing broke or popped undone. I consider that a good property for a
model which is essentially held together by friction.
Both the transmission and steering have been well designed to permit full
customization using “off the shelf” or is that “out of the box” Technic
parts and techniques.
Overall review.
As an R/C toy.
Fun. It has some zip and I think it would form the basis of some great
models. Its nice to have a proportional steering system which attaches to
Technic parts. (I’m going to have to think hard about the ramifications of
this option ;)
As an add-on for the big Lego collection.
Fun. I think this may provide a seriously overdue capability which will
empower Lego purists with an option which they have not had access to
previously.
Overall impression. Great. Seems expensive, but then good Lego sets always
do. A must if you are into Technic and need RC. As soon as they’ve been
around for a while and start showing up on discount, I will buy a bunch! For
now, I’ll continue to exercise the cat from which I got a thumbs (?) up.
JB
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In lugnet.technic, John Barnes writes:
> 8475 RC Race Buggy – A quick initial review
[snip]
> Overall impression. Great. Seems expensive, but then good Lego sets always
> do. A must if you are into Technic and need RC. As soon as they’ve been
> around for a while and start showing up on discount, I will buy a bunch! For
> now, I’ll continue to exercise the cat from which I got a thumbs (?) up.
Wow! this sounds like it might be pretty useful! Those motors sound
interesting...plenty of scope for breaking gears...
Any info on the full throw of the proportional output?
Thanks for the review!
ROSCO
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I have to say -surprisingly, this looks like maybe TLC is getting more on
track. This set seems to have much more potential than I expected. Not
being able to pry this away from my 10 year old who was busily building, I
had to wait until he went to bed to get a look.
The modularity of this unit fits much better with TLC philosophy - AND
offers potential in other areas - robotics and technics. The drive motors
are mounted in "arm like units" which use standard technic/RIS connector
wires. Think "L -shaped" with the motor in a fat base and two drive points
in the long arm (both are connected to the motor, but turn in opposite
directions). These units have 3 pairs (matched on 'top' and 'bottom' of the
arm) of 2 holed mounting "ears" and attach to pivoting pads on the main body
to provide part of the sprung suspension. Two of these units provide the
drive for this unit (its really 2WD). A separate module for steering has
lots of potential. The main "body" has two connector points - one for both
drive motors and a second for the steering unit.
The wheels are also quite cool with TWO styles of tires (off-road and
racing) for the 4 wheel hubs. An extra set of 4 hubs would've been nice,
but I'm impressed enough with the choice in tires. I personally haven't
seen these tires or hubs before though they might have come on one of the
supercars. The tires are marked 56x28ZR and the off-road 68.8x36R. The hub
itself is marginally smaller than the whole 20x30 tire.
I have to admit that the $129 does seeem pricey but I'll be buying more (a
bunch more) if I see the price drop anywhere. A combination of these parts
and an RCX might be really interesting. The "battle bot" concept has passed
throughmy thoughts as well - though I've got kids trying that waay too often
in class already with what they've got access to via the microscout, scout
or RCX.
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Does anyone have pics of these parts up on the web anywhere? I can't really
get the idea from the text descriptions.
--Jack Gregory
"John Heins" <Johnmhiii@aol.com> wrote in message
news:H0rK02.99z@lugnet.com...
> I have to say -surprisingly, this looks like maybe TLC is getting more on
> track. This set seems to have much more potential than I expected. Not
> being able to pry this away from my 10 year old who was busily building, I
> had to wait until he went to bed to get a look.
>
> The modularity of this unit fits much better with TLC philosophy - AND
> offers potential in other areas - robotics and technics. The drive motors
> are mounted in "arm like units" which use standard technic/RIS connector
> wires. Think "L -shaped" with the motor in a fat base and two drive • points
> in the long arm (both are connected to the motor, but turn in opposite
> directions). These units have 3 pairs (matched on 'top' and 'bottom' of • the
> arm) of 2 holed mounting "ears" and attach to pivoting pads on the main • body
> to provide part of the sprung suspension. Two of these units provide the
> drive for this unit (its really 2WD). A separate module for steering has
> lots of potential. The main "body" has two connector points - one for • both
> drive motors and a second for the steering unit.
>
> The wheels are also quite cool with TWO styles of tires (off-road and
> racing) for the 4 wheel hubs. An extra set of 4 hubs would've been nice,
> but I'm impressed enough with the choice in tires. I personally haven't
> seen these tires or hubs before though they might have come on one of the
> supercars. The tires are marked 56x28ZR and the off-road 68.8x36R. The • hub
> itself is marginally smaller than the whole 20x30 tire.
>
> I have to admit that the $129 does seeem pricey but I'll be buying more (a
> bunch more) if I see the price drop anywhere. A combination of these • parts
> and an RCX might be really interesting. The "battle bot" concept has • passed
> throughmy thoughts as well - though I've got kids trying that waay too • often
> in class already with what they've got access to via the microscout, scout
> or RCX.
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And if someone does take it upon themselves to snap pictures:
I'd also love to see a sideview and topview comparison of the 8475 wheels
with their off-road tires vs. the 8466/8458 wheels with their off-road tires,
and the same comparisons using each wheels' respective smooth, racing tires
as well. (This of course would require one to own all three sets).
"J G Gregory" <jgg@ultranet.com> wrote in message news:H0sAsI.Jtr@lugnet.com...
> Does anyone have pics of these parts up on the web anywhere? I can't really
> get the idea from the text descriptions.
>
> --Jack Gregory
>
> "John Heins" <Johnmhiii@aol.com> wrote in message
> news:H0rK02.99z@lugnet.com...
> > I have to say -surprisingly, this looks like maybe TLC is getting more on
> > track. This set seems to have much more potential than I expected. Not
> > being able to pry this away from my 10 year old who was busily building, I
> > had to wait until he went to bed to get a look.
> >
> > The modularity of this unit fits much better with TLC philosophy - AND
> > offers potential in other areas - robotics and technics. The drive motors
> > are mounted in "arm like units" which use standard technic/RIS connector
> > wires. Think "L -shaped" with the motor in a fat base and two drive • points
> > in the long arm (both are connected to the motor, but turn in opposite
> > directions). These units have 3 pairs (matched on 'top' and 'bottom' of • the
> > arm) of 2 holed mounting "ears" and attach to pivoting pads on the main • body
> > to provide part of the sprung suspension. Two of these units provide the
> > drive for this unit (its really 2WD). A separate module for steering has
> > lots of potential. The main "body" has two connector points - one for • both
> > drive motors and a second for the steering unit.
> >
> > The wheels are also quite cool with TWO styles of tires (off-road and
> > racing) for the 4 wheel hubs. An extra set of 4 hubs would've been nice,
> > but I'm impressed enough with the choice in tires. I personally haven't
> > seen these tires or hubs before though they might have come on one of the
> > supercars. The tires are marked 56x28ZR and the off-road 68.8x36R. The • hub
> > itself is marginally smaller than the whole 20x30 tire.
> >
> > I have to admit that the $129 does seeem pricey but I'll be buying more (a
> > bunch more) if I see the price drop anywhere. A combination of these • parts
> > and an RCX might be really interesting. The "battle bot" concept has • passed
> > throughmy thoughts as well - though I've got kids trying that waay too • often
> > in class already with what they've got access to via the microscout, scout
> > or RCX.
>
>
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In lugnet.technic, Mark Koesel writes:
> And if someone does take it upon themselves to snap pictures:
>
> I'd also love to see a sideview and topview comparison of the 8475 wheels
> with their off-road tires vs. the 8466/8458 wheels with their off-road tires,
> and the same comparisons using each wheels' respective smooth, racing tires
> as well. (This of course would require one to own all three sets).
Greetings,
Hope these pictures help clear up some questions. First time for me using
the camera so they aren't as clear as I would like them but I thought you
would want to see the new parts : )
Lots of promise with these parts and I want to Thank the engineers and
designers at LEGO® for producing this set
John R. Morgan
http://www.brickshelf.com/cgi-bin/gallery.cgi?f=23341
Picts of the street tires,offroad tires with
8466 (offroad1.jpg),
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226763
8466(offroad2)
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226764
,8458 (street.jpg)
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226773
Also the motor unit
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226761
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226762
and the RC receiver unit from several angles. : )
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226767
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226768
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226766
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In lugnet.technic, John Morgan writes:
sorry about that ... didnt know how to create direct links to the images...
http://www.brickshelf.com/gallery/TheGarage/8475-parts/rcvrfronttop.jpg
http://www.brickshelf.com/gallery/TheGarage/8475-parts/motor1.jpg
http://www.brickshelf.com/gallery/TheGarage/8475-parts/motor2.jpg
http://www.brickshelf.com/gallery/TheGarage/8475-parts/offroad1.jpg
http://www.brickshelf.com/gallery/TheGarage/8475-parts/offroad2.jpg
http://www.brickshelf.com/gallery/TheGarage/8475-parts/street1.jpg
http://www.brickshelf.com/gallery/TheGarage/8475-parts/rcvrbottom.jpg
http://www.brickshelf.com/gallery/TheGarage/8475-parts/rcvrfronttop.jpg
http://www.brickshelf.com/gallery/TheGarage/8475-parts/rcvrtopfront.jpg
> In lugnet.technic, Mark Koesel writes:
> > And if someone does take it upon themselves to snap pictures:
> >
> > I'd also love to see a sideview and topview comparison of the 8475 wheels
> > with their off-road tires vs. the 8466/8458 wheels with their off-road tires,
> > and the same comparisons using each wheels' respective smooth, racing tires
> > as well. (This of course would require one to own all three sets).
>
> Greetings,
> Hope these pictures help clear up some questions. First time for me using
> the camera so they aren't as clear as I would like them but I thought you
> would want to see the new parts : )
>
> Lots of promise with these parts and I want to Thank the engineers and
> designers at LEGO® for producing this set
>
> John R. Morgan
>
>
> http://www.brickshelf.com/cgi-bin/gallery.cgi?f=23341
>
> Picts of the street tires,offroad tires with
> 8466 (offroad1.jpg),
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226763
>
> 8466(offroad2)
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226764
>
> ,8458 (street.jpg)
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226773
>
>
> Also the motor unit
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226761
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226762
>
> and the RC receiver unit from several angles. : )
>
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226767
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226768
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226766
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Wow, thanks for the pics. I am absolutely _shocked_ at how much smaller
the 8475 rims and wheels are. I thought they were maybe 2/3 to 3/4 the
size of the 8466/8458 equivalents. I was totally fooled -- they are
barely half the size. Impressive that the new motors can actually drive
the 8466 stock wheels/tires and all (as one poster has proven). They
must be very powerful.
Thanks again for the pics.
"John Morgan" <trees@utk.edu> wrote in message news:H0t9Et.17w@lugnet.com...
> In lugnet.technic, Mark Koesel writes:
> > And if someone does take it upon themselves to snap pictures:
> >
> > I'd also love to see a sideview and topview comparison of the 8475 wheels
> > with their off-road tires vs. the 8466/8458 wheels with their off-road tires,
> > and the same comparisons using each wheels' respective smooth, racing tires
> > as well. (This of course would require one to own all three sets).
>
> Greetings,
> Hope these pictures help clear up some questions. First time for me using
> the camera so they aren't as clear as I would like them but I thought you
> would want to see the new parts : )
>
> Lots of promise with these parts and I want to Thank the engineers and
> designers at LEGO® for producing this set
>
> John R. Morgan
>
>
> http://www.brickshelf.com/cgi-bin/gallery.cgi?f=23341
>
> Picts of the street tires,offroad tires with
> 8466 (offroad1.jpg),
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226763
>
> 8466(offroad2)
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226764
>
> ,8458 (street.jpg)
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226773
>
>
> Also the motor unit
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226761
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226762
>
> and the RC receiver unit from several angles. : )
>
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226767
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226768
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=226766
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Many thanks to John Morgan for putting the pictures up. My question (to
John Heins or anyone who can answer) is based on looking at those images.
"John Heins" <Johnmhiii@aol.com> wrote in message
news:H0rK02.99z@lugnet.com...
> The modularity of this unit fits much better with TLC philosophy - AND
> offers potential in other areas - robotics and technics. The drive motors
> are mounted in "arm like units" which use standard technic/RIS connector
> wires. Think "L -shaped" with the motor in a fat base and two drive • points
> in the long arm (both are connected to the motor, but turn in opposite
> directions).
Has anyone tried to drive these with Mindstorms? What is the no-load RPM at
full power?
> A separate module for steering has
> lots of potential. The main "body" has two connector points - one for • both
> drive motors and a second for the steering unit.
Hmm. In the pictures on BrickShelf, there appears to be an axle coming out
of the front of the receiver unit. No separate steering unit. Is this what
you are talking about, or does this piece come off? Is this proportional
steering? What is the total amount of rotation for that axle output?
Does anyone know what frequency band these are on in the United States
market?
--Jack Gregory
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In lugnet.technic, Jack Gregory writes:
> Has anyone tried to drive these with Mindstorms? What is the no-load RPM at
> full power?
I put some info here a while back;
http://news.lugnet.com/technic/?n=7701
JB
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In lugnet.technic, John Barnes writes:
> 8475 RC Race Buggy – A quick initial review
>
> This is a 27 MHz remote control vehicle set. It isn’t called Technic, but it
> is primarily composed of Technic parts, some new, at least to me.
> ...
I just want to add that I've only seen two of these, and they both had a
minute problem with centering the steering.
A full proportional system has a trim setting on the transmitter, since the
signal is constantly sent all the time the transmitter is on. With this
system, the signal is only sent when you move a control (the clue is that
the controller has no 'off' switch), and three positions left or right is
not enough to do accurate trimming over-the-air.
There is a trim control on the steering block itself, but that does very
little. On it's own, it alters the spring-centered position of the steering
(and it's not rack and pinion, it's just a crank lever). However, connect
it to the steering servo built into the receiver, and the spring-centering
becomes irrelevant. If the servo doesn't center exactly, the steering will
be slightly off regardless of the trim setting.
The problem comes when the servo centers itself. Move the stick to the
right and release, and it centers perfectly. Move it to the left and
release, and it can over-compensate and end up slightly over to the right.
You only notice it though over a long distance.
Having said that, it's only a tiny effect and I'd still recommend the set
even if they all do it. The extra channel for controlling your own motor or
lights is a fantastic touch. Mine has a red/blue flashing bar, two spots
and a siren!
I presume the whole thing is done by transmitting a single byte of data -
three bits for left/right, three for forward/back and two for switching the
auxilliary 9V supply to +/0/-.
It's just a shame that the only parts in the whole set that have actual Lego
studs on them are the 9V connecters...
Jason J Railton
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I'm pretty not happy with the steering centering myself. I can't get mine
to center no matter what I do. Oh well, I only bought the set for the
motors anyway.
-Rob
hmm...New motor...Rail Racer 2003...hmmm
"Jason J Railton" <j.j.railton@ntlworld.com> wrote in message
news:H19256.EI@lugnet.com...
> In lugnet.technic, John Barnes writes:
> > 8475 RC Race Buggy - A quick initial review
> >
> > This is a 27 MHz remote control vehicle set. It isn't called Technic, but • it
> > is primarily composed of Technic parts, some new, at least to me.
> > ...
>
> I just want to add that I've only seen two of these, and they both had a
> minute problem with centering the steering.
>
> A full proportional system has a trim setting on the transmitter, since • the
> signal is constantly sent all the time the transmitter is on. With this
> system, the signal is only sent when you move a control (the clue is that
> the controller has no 'off' switch), and three positions left or right is
> not enough to do accurate trimming over-the-air.
>
> There is a trim control on the steering block itself, but that does very
> little. On it's own, it alters the spring-centered position of the • steering
> (and it's not rack and pinion, it's just a crank lever). However, connect
> it to the steering servo built into the receiver, and the spring-centering
> becomes irrelevant. If the servo doesn't center exactly, the steering • will
> be slightly off regardless of the trim setting.
>
> The problem comes when the servo centers itself. Move the stick to the
> right and release, and it centers perfectly. Move it to the left and
> release, and it can over-compensate and end up slightly over to the right.
> You only notice it though over a long distance.
>
> Having said that, it's only a tiny effect and I'd still recommend the set
> even if they all do it. The extra channel for controlling your own motor • or
> lights is a fantastic touch. Mine has a red/blue flashing bar, two spots
> and a siren!
>
> I presume the whole thing is done by transmitting a single byte of data -
> three bits for left/right, three for forward/back and two for switching • the
> auxilliary 9V supply to +/0/-.
>
> It's just a shame that the only parts in the whole set that have actual • Lego
> studs on them are the 9V connecters...
>
>
> Jason J Railton
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Rob Hendrix <rob.removebeforesending@msltc.org> wrote in message
news:H195wz.CK7@lugnet.com...
> I'm pretty not happy with the steering centering myself. I can't get mine
> to center no matter what I do. Oh well, I only bought the set for the
> motors anyway.
>
> -Rob
> hmm...New motor...Rail Racer 2003...hmmm
>
> "Jason J Railton" <j.j.railton@ntlworld.com> wrote in message
> news:H19256.EI@lugnet.com...
> > In lugnet.technic, John Barnes writes:
> > > 8475 RC Race Buggy - A quick initial review
> > >
> > > This is a 27 MHz remote control vehicle set. It isn't called Technic, • but
> it
> > > is primarily composed of Technic parts, some new, at least to me.
> > > ...
> >
> > I just want to add that I've only seen two of these, and they both had a
> > minute problem with centering the steering.
My copy is the only other one that Jason had seen, and it had a severe
problem with the steering, or at least we initially thought it had. However,
a little bit of investigation showed that it was not the steering at fault,
but one of the two drive motors.
When fully powered, one of the motors turned fine, with quite a bit of
torque, but the other seemed to slip at the slightest obstruction. Imagine
the motor under full power buzzing away happily, but the wheel not turning!
I called consumer services with this problem, and a short list of other
problems including broken 8448 hydraulic cylinders (finally got round to
sorting that), but they fobbed me off saying that as the kit had been bought
from Legoland Windsor, it was their place to sort it, though they were happy
to replace the parts from the 8448. They even went so far as to give me the
phone number, and a contact name at LLW for replacement parts!
As expected, LLW had no idea what consumer services were talking about.
Half a dozen phone calls, 2 weeks, and 2 parcels from Billund later, I gave
up and dismantled the motor myself.
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=235908
It turns out that the brass gear attached to the motor was a sloppy fit, so
was free to rotate and slide on the spindle - no way that was going to
transmit much power.
A spot of superglue, remodelling of the kit, and I was out shredding tyres.
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=235907
Naturally, the rear tyres were promptly swapped for 'disposable' ones picked
up from the Red Letter Days visit, so the pictured car although not truly an
alternate model could very easily be so.
I also opted to add some protection to the underside of the car in the form
of electrical tape after the first encounter with steps resulted in some
rather scratched beams.
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=235906
If anyone else feels the need to dismantle one of these motors, note the
holes and associated nubs either side of the peg holes, then ignore them. I
found the easiest way to dismantle the motor was to get a fingernail between
the two halves at the end farthest from the motor, and pull them apart with
a twisting motion.
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=235912
Finally, a look at the gear ratio's reveal that the two outputs are not only
in opposing directions, but also different speeds. For anyone interested,
the ratio's are;
12:41 15:26 15:24 17:23
giving drive ratios of;
6.75:1 and 8.103:1
(Duckie) Dave Till
Apologising in advance for any goofs he made whilst composing this at around
2am.
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I am pretty cluless about lights, sirens... Can anyone (Jason?) recommend
either a good set that has lights and/or sirens compatible with the 9V on
the 8475 or even individual bricks from BrickLink?
Thanks in advance.
Laurent
In lugnet.technic, Jason J. Railton writes:
> Having said that, it's only a tiny effect and I'd still recommend the set
> even if they all do it. The extra channel for controlling your own motor or
> lights is a fantastic touch. Mine has a red/blue flashing bar, two spots
> and a siren!
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I'm not 100% certain, but I think the lights and siren parts from the town
and space light and sound sets should work with this. Try set 6480 for a
look at one of the sets.
For parts on Bricklink, try:
Lights:
http://www.bricklink.com/catalogItem.asp?P=6035
http://www.bricklink.com/catalogItem.asp?P=4767
http://www.bricklink.com/catalogItem.asp?P=4771
http://www.bricklink.com/catalogItem.asp?P=4773
Sound:
http://www.bricklink.com/catalogItem.asp?P=bb03
accessory sets:
http://www.bricklink.com/catalogItem.asp?P=5030
http://www.bricklink.com/catalogItem.asp?P=5033
http://www.bricklink.com/catalogItem.asp?P=5035
http://www.bricklink.com/catalogItem.asp?P=5036
http://www.bricklink.com/catalogItem.asp?P=1178
http://www.bricklink.com/catalogItem.asp?P=3748
Or look under electric, light and sound in the catalog.
Hope this helps,
Benjamin Whytcross
In lugnet.technic, Laurent Moll writes:
> I am pretty cluless about lights, sirens... Can anyone (Jason?) recommend
> either a good set that has lights and/or sirens compatible with the 9V on
> the 8475 or even individual bricks from BrickLink?
>
> Thanks in advance.
>
> Laurent
>
> In lugnet.technic, Jason J. Railton writes:
> > Having said that, it's only a tiny effect and I'd still recommend the set
> > even if they all do it. The extra channel for controlling your own motor or
> > lights is a fantastic touch. Mine has a red/blue flashing bar, two spots
> > and a siren!
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They are geared but to a higher final speed of 1200 rpm at
> 9 volts at 200mA. (Typical Mindstorms motors run 360 rpm at 9 volts at 20
> mA.)
Does anyone know how much touque these motors have (from the drive hole
thingy) in n/m. Mindstorms motors produce about 8.9 n/m and 8720 motors
produce about 1 n/m but spins at about 1400 rpm.
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