TasV

I was going through my nxt stuff and came across a bunch of NXT sensors that we no longer need. All the sensors are unused but I only have the box for the HiTechnic barometric air pressure sensor. Temperature sensors (http://www.bricklink.com/catalogItem.asp?S=9749-1) sell for about $50 AUD (Australian Dollars) each. Will let them go for $35 AUD each. HiTechnic Barometric Air Pressure sensor (https://www.hitechnic.com/cgi-bin/commerce.cgi?preadd=action&key=NBR1036) also sells for about $50. Will let it go for $40. Photo is of actual sensors. The compass sensor is no longer available (we've decided to keep it for Robosoccer). Items are located in Australia but I will post anywhere. Postage will depend on where you are, so contact me for postage amounts or visit http://www.austpost.com.au to calculate the amount for postage. Money raised will go towards helping Ulverstone High School purchase an EV3 kit. Payment is by PayPal. Thanks, Simon

We haven't actually used any of these... so putting them into a model would be tricky given their range of turning is so large... maybe a technic billy cart ;)

My Son came up with another this afternoon: Bionicle parts are: 44135, 44247, and 44136 This one is pretty good as it uses the 44136 piece to lock the steering arm from the bottom.

This is something really simple my Son and I were playing with to make steering (H.O.G. mostly but it could be motorised easily), for smaller vehicles. Bionicle parts are 44137 and 44810. Works well and gives vehicles a nice small turning circle. The pin joining one part to the other is low friction and turns easily and smoothly.

Over the weekend I will look through the boxes and show a neat steering mechanism we made using bionicle gears, technic gears and other bionicle/technic parts... won't have time until then to sit down and play. It worked really well. We just decided not to use it because there was a bit too much 'slop' in the mechanism.

I'd really like to see a robot based on three omniwheels that can follow a line using a PID! That would be sweet but really hard I think.

I don't really look at the models much unless I want to learn how a particular mechanism works (actually... that's why I buy models... not so much for what it is modelling itself), or if I want the parts. The Triple Challenge is a good example... my Son (Aiden) and I know what we want to build for it (time is the biggest challenge), and we went through the prize list and said if we won 1st prize we'd take the Crawler for the RC gear and to learn more about transmissions. If we got 2nd we'd choose the Service Truck for the pneumatic pieces and to learn about crane arms. The hardest choice, for Aiden and I, is actually is for third place. The motor bike is cool and we could use more chain links and another 40 tooth gear but the mini backhoe has the most useful mechanisms we can adapt for our robots... we'd probably end up choosing the motor bike just because it is so cool!

Blue tractors=Ford ;)

Ooooooohhhh.. I barely have time to scratch myself atm... I'll leave that job to someone more qualified and endowed with time ;)

<cough> TasV <cough> ?????

I'm impressed with the increase in torque in the EV3 motor, but she's power hungry!!!

As the Doc said above, this is very cool! I'm assuming you used the Elasto Plastic material (I haven't checked out your website for a while so please forgive my lack of memory if it's stated there)? How does the feel of this material compare to the rubber compound regular Lego tires are made of? EDIT: I see you got Shapeways to make the moulds and you cast them from silicone... that's awesome! Jim, no sign of the parts yet. I'll be sure to let you know when they arrive. Simon

So... if it IS a transformer... does that count as 1 model or 2

It's not on Bricklink.

What are the full-Lego omniwheels? I would love TLG to make an omniwheel to go with their robotics kits. I have two of the 48mm Rotacaster omniwheels and they are worth the money IMO. I have about 4 of these: ...in my NXT kits at work and they work fine but are quite large. The downside of the Rotacasters is that they are funny size that does not easily match up with standard Lego pieces. It can be done but you need to switch from odd lengths to even lengths to get then to line up.

The website (link above) states it is compatible with NXT, EV3, and Arduino and can be programmed in NXT-G, RobotC, NXC, and EV3 (whatever it is called). On the link provided above you can download NXT-G blocks, EV3 blocks and see sample EV3 programs. The ribbon cable going into it has the plug on it to go into your sensor ports straight out of the box. This link: http://www.mindsensors.com/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=192&MMN_position=32:32 ...explains which Mindsensors need firmware upgrades and how to upgrade them. The Glidewheel-AS requires a firmware upgrade.

Except that in previous questions it has been stated that the three things need to be interacting and not just random static things.

The title says EV3 but your opening sentence says NXT. Are looking for NXT or EV3? Either way... this mindsensors sensor should do what you are after: http://www.mindsensors.com/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=173

I made a small tool for this because I am sick of drilling holes in the palm of my hand. I've just uploaded it to Shapeways here: https://www.shapeways.com/model/1404450/axletool.html?li=shop-results&materialId=6 (I should note that all money raised from selling this tool, and any other part on my Shapeways account, goes towards funding my school robotics class so we can purchase additional EV3 kits, parts, software licenses (for RobotC), and sensors). It has an 8L axle on one end which should be long enough to push most axles out, or at least far enough to give you enough grip to pull them out the rest of the way, and a cross-axle hole in the other end to help me push the axles in when I need to push them through lots of pieces when building. The ball on the end is 20mm in diameter with a cup in the end for your thumb. I'm pretty happy with the cost of it too. I made a solid one that was going to cost a massive $18 to make, so redesigned it recently to make it hollow, which reduced the price to just over $5 Australian dollars.

This is really cool... though I think better, more responsive steering might be in order:

What part is the long axle with pin-holes on the ends?

Awesome!!! Just awesome!

From the rules:

I also think it should be anonymous so it doesn't turn into a popularity contest. I.e. entries sent to the convenor of the competition who will then list it with some kind of generic code for identification purposes and no distinguishing text/logos/etc on the photos/videos.

Quick question... do all three models have to be made at once or can they be made separately and then LDD/POV-Ray renders etc used to present them on a suitable background? I'm not sure I have enough Lego to make all three models and may need to build each one individually and then deconstruct them to make the next one. I mean.. we seem to have half a room full of Lego but we've recently begun organising it so that my Sons and I can sit and build together, and to separate the Technic from the Bionicle from all the rest and the amount of Technic may not stretch that far and my budget won't extend to buying all the extra parts needed.