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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 ...


13

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: ...


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

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 ...


9

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


8

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/


7

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 ...


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 ...


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

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

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

This part is called Micro Scout with Dark Gray Base the white version on your photo comes from 9748-1: Droid Developer Kit (pictures via Bricklink)


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

Just stumbled across this little gem of a Lego omni wheel!


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


5

Hmm... I don't know... I personally, wouldn't try to reinvent pin placement of Technic holes and Studs. I'm not saying being creative that way is too challenging. What I am saying is that, we should work with examples, or in this case parts that already bridge Classic stud width with Technic holes. Placing pins where the studs belong seems akin to ...


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

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

It is possible to communicate between the 31313 and 51515 hubs. See these youtube videos: https://www.youtube.com/watch?v=PT4_4v1W2C8 https://www.youtube.com/watch?v=p3uk80tuqI4 In the first video a SPIKE Prime hub (same as 51515 just different firmware) is used to control a 31313 hub and in the second video there's more of explanation of how it's done. I do ...


4

This formula will need the lateral distance between wheels, i.e. the distance between left and right wheel, not the back and front wheel. motor_pair.move(8.1 * math.pi / 2, 'cm', steering=100) The steering=100 parameter means that the wheels will move in opposite directions. For the 8.1 value, one wheel will move +12.7cm and the other wheel will move -12....


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 ...


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

What if you had anti-studs where you want them, at stud-depth, but also overlaid technic holes at full technic pin depth where you want them? This would lead to a complicated, non-standard arrangement, but if you look at, eg, the new 2x1 jumper plates, they are designed to allow a stud in the middle between the two normal anti-studs. Since you have two ...


3

The .UF2 file format appears to be a fairly compact, binary format for reliably transferring data to "microcontrollers" (i.e. small embedded systems such as the EV3 controller), and is the format used by the Microsoft MakeCode application, recommended as part of the First LEGO League. The .ev3 file is actually a zip file containing a number of additional ...


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

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

Another option is to use LOTS of 60483 Technic, Liftarm 1 x 2 Thick with Pin Hole and Axle Hole as shown in: https://youtu.be/X89pXBJaPWI?t=7s


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