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26

Here are some examples that caught my attention in the last years: Cambridge scientists are using LEGO Mindstorms in their lab instead of a professional robot, saving them large amounts of money. The Kno tablet development team is using a LEGO rig to perform automated stress tests on their devices. University of Southhampton is using LEGO bricks as the ...


11

You will need to decide between 3711 Technic Chain Link and 3873 Technic Chain Tread, or possibly use them together. Each link of chain is about 1 cm long and 0.8 cm wide and you can get them in packs of 108 (Chain Link Set Product Code: 2000645) The Chain Tread are wider, but seem to be available only in smaller packs, such as Set # 9938-1: ...


11

There's no "race" as this has been solved multiple times by different people (solving rubik's cube isn't that hard). just take a look at the CubeStormer (or, better, the CubeStormer II). I also saw building-plans and programs for such a cube-solver (not exactly the linked one). If you like to rebuild such a thing: I'll add links as soon as i find them. ...


10

Yes, you can buy all the electronic parts by themselves, but given that the electronic parts are the bulk of the cost, you may not save much. The MINDSTORMS EV3 set (MSRP $349.99 USD) contains: 1 - EV3 Intelligent Brick (MSRP $189.99 USD) 1 - EV3 Color Sensor (MSRP $39.99 USD) 1 - EV3 Infrared Sensor (MSRP $29.99 USD) 1 - EV3 Touch Sensor (MSRP $19.99 USD) ...


9

There are many ways you can approach this problem using LEGO. I would recommend the 8547 Mindstorms NXT 2.0 set, as it includes the software required to program a basic paper feeder including a microprocessor (NXT Brick), three motors, four sensors (ultrasonic, two touch and a colour sensor) as well as plenty of other parts which you can use to construct the ...


8

It depends a lot how you distinguish useful from proof of concept. I think this clock could be useful (or at least be fun): http://tiltedtwister.com/. The website even provides building instructions. However it will be noisy, expensive and take a lot of time (and fun) to build, which will make it less useful for a lot of people. There's a super computer ...


7

This seems pretty much bordering on the impossible, given the current state of (LEGO) engineering capabilities. What you are describing is a Von Neumann Machine and as far as I know nobody succeeded in creating one, not just in LEGO but in general. The problems you'd have to overcome: The robot must be capable to exert sufficient force to overcome the ...


7

In this great GBC machine built akiyuki, you can see 2 types of conveyor belts. The first one is made of the small tread links (3873). The second and third ones are made with the large tread links (57518) He provides many videos and pictures through his blog and YouTube channel.


7

The graphical software that ships with the EV3 set can program both EV3 bricks and older generation bricks. We assume that this means NXT 1.0 and 2.0 bricks. However, it is unlikely that NXT-G will work with EV3 bricks as EV3 bricks run a custom build of Linux, whereas older bricks run a custom firmware. LEGO will create an offical app for both Apple and ...


7

I got inspired by the idea of a vertical Slewing Bearing. I made this “horrible” prototype to demonstrate the principles. One side of the assembly has a fixed wheel attached to it using multiple pins. The other side has multiple bearings. The idea is that the vertical weight is shared between the bearings (on one side) and between the pins supporting the ...


7

Here's a design I've been using, based on this model by Lambert Varias: It's not a perfect circle, but it is relatively small all things considered: It's pretty simple, but here's a partial disassembled version to better show what goes into it: Parts shown: 1x 55013 2x 4265c 2x 57585 6x 32013 6x 32556 12x 42610 12x 50945


6

It really depends on the level of self-replication you desire, and your willingness to introduce additional non-LEGO components to the process. First off, assuming a pure solution, there is no way for LEGO blocks to produce more LEGO blocks. You can't make a mold for making an ABS plastic part out of parts made from ABS plastic. Even if you could produce ...


6

As you say, there are still tons of unknown at this point, so asking the question is way premature. However, considering the software is said to be based on the same technology as the one in the NXT, it's likely it won't be too different, and that's why that software will be able to control NXT bricks. However, I also doubt you'll be able to control EV3 ...


6

I have copied a design by Isogawa Yoshihito I prefer it over the Lambert Varias design as the wheels are positioned more radially More pictures in this EuroBricks thread: https://www.eurobricks.com/forum/index.php?/forums/topic/76297-isogawayoshihitos-lego-technic-omni-wheel-crab/


5

As was pointed out, this question is not specific in nature, so it's hard to give a definitive answer. If you haven't already done so, it would probably be helpful head over to Lego.com and grab get the NXT 2.0 User Guide and perhaps begin looking through the sample programs. This book may also be helpful to you: The LEGO MINDSTORMS NXT 2.0 Discovery Book: ...


5

Lego Antikythera Mechanism can be seen at http://www.youtube.com/watch?v=RLPVCJjTNgk The Antikythera Mechanism: http://bit.ly/fm4oFK is the oldest known scientific computer, built in Greece at around 100 BCE. Lost for 2000 years, it was recovered from a shipwreck in 1901. But not until a century later was its purpose understood: an astronomical clock that ...


5

Dropping stones onto your LEGO doesn't sound like a kind way to treat your expensive Technic parts; I imagine that small bits of stone and dirt will fall through a belt of Technic Chain Link or Technic Chain Tread , what with them being a chain rather than a belt. This will then lead to other bits of your contraption becoming polluted with abrasive gunk. ...


5

This is actually a surprisingly difficult task. If you search for similar questions over on the Robotics stack exchange, you will find very smart people who can't even get it right with thousand-dollar localization solutions and graduate-level control theory. If you have a Gyro sensor like Michael suggested, you're on the right track. You can probably get ...


5

It looks like the page listing downloads is down, but direct links to the downloads still work. I believe that this is the file that you're looking for: https://www.hitechnic.com/upload/306-Color%20Sensor%20V2.zip


4

The RCX system provides a certain average voltage level (via PWM) to the motors. This means that speed can vary based on load, and may even vary slightly from motor to motor. Power will also vary based on load, as a motor with more load will draw more current if voltage is held constant. If you're interested in specifics, you can measure the voltage and ...


4

Picking paper sheets from a stack shouldn't be too much of an issue with rubber wheels. However, One of the problems you may encounter is that multiple sheets stick together. To avoid this, you'll first need to shuffle your stack a little (I only know the french word for this process: déramer, sorry.), but even then it can happen. I've worked with an ...


4

This may sound like a naive approach, but isn't the turntable overkill in this case? Did you try a simple Technic pin peg to connect both parts if the robot, or do you actually need some transmission to go from one half to the other? If a Technic peg isn't robust enough, maybe an axle would do the trick. I'd suggest using one Technic Axle 8 with Stop (), ...


3

I once built an NXT robot that opened and closed a set of blinds. The blinds had a rod that you could spin to open and close them, and the rod had a hole at the end, which made it pretty easy to hook up to a mindstorms motor. I made two different versions. One version was a "clapper" - with a microphone sensor, and one was a smarter version, that used a ...


3

Your question is not so clear, but it seems like you want to build robots and you want Technic pieces. Then Lego Mindstorms is the product you should buy. While not formally part of the Technic range, it contains only Technic elements in addition to the special electronic Mindstorms parts. You can also take a look at Lego BOOST, a lightweight variant of ...


3

Do you have a gyro sensor on your robot? I'm assuming you're using an EV3 set, and the Mindstorms programming environment. If so, reset your gyro sensor, and then insert a loop block attached to the gyro sensor. Set the loop settings to >= 16 degrees, and insert a tank move block into the loop. The motor should be set to 'on', with wheels going in opposite ...


2

It depends how you define machine. I've used a static rig as a phone holder on a desk. I've built small tools for pushing Lego pins out when constructing Lego models. I've built innumerable machines for demonstrating principles of physics, engineering and structure. If someone has dominoes as a hobby, then there is a Lego domino setting machine - http://...


2

Spread the weight using gears. Essentially you'll have 4 segments connected to a center gearbox. Use 9 bevel gears in the gearbox, with 6 on the outside. (Yellow=bricks, Black=rods, Grey=gears) For strength you can have reinforcements going from the gearbox to the other side of the legs to box it in.


2

If you are using the EV3 Sensors you should use the EV3 Color Sensor which can detect 8 colors (colorless, black, blue, green, yellow, red, white and brown). If you are using the NXT I would recommend the HiTechnic Color Sensor or HiTechnic Color Sensor V2... I hope I could help.


2

Updating to iOS to 10.10.5 seems to have solved the problem for me. Hopefully this helps someone else out there.


2

For moving on defined path you can achieve amazing accuracy with LEGO MINDSTORMS EV3 odometry combined with good gyroscope but this still will result in a collision sooner or later. Examples of such systems can be found here and here Both of these systems use MICROINFINITY CruizCore XG1300L gyro/accelerometer but there are other good gyroscopes. The only ...


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