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Found 175 results

  1. As part of our fully automated train layout (see more at our blog here: siouxnetontrack.wordpress.com), I have started to build a fully automated container warehouse. The warehouse should be able to store a large number of candy containers. I want to build four rows with shelves to store the containers, served by two robots that can store and retrieve the containers. The first thing I needed is to build the vertical lift for the stacker crane. I looked at other builds and found out that there are three possible mechanisms to create the vertical movement: Gears climbing a toothed bar (element 3743), a nice example can be found here: https://www.youtube.com/watch?v=GToA2tOVyHg Cables pulling the lift up, an example can be found here: https://www.youtube.com/watch?v=rCNwQVjXz60 Chain links, an example that uses the small elements 3711 can be found here: https://www.youtube.com/watch?v=fQIAAb8x8MI And as you may have guessed, I have tried something different. I use the worm gears (element 4716) to get the vertical movement, this is the first test setup: If you stack the elements 4716 on top of each other, they should be aligned correctly to create one, long worm gear. I just finished a first prototype of the stacker crane. The crane has two forks, in order to store or retrieve a container from either the left row or the right row. The lift can move up and down, the (horizontal) movement along the row needs to be build. One EV3 M motor is used to move the forks either to the left or to the right. It uses a color sensor to determine the middle position. One EV3 L motor is used for the vertical movement. A touch sensor is used to detect the bottom position. Watch the video to see a demo: More details will be added later. Enjoy watching and please let me know what you think. Hans
  2. LEGO MINDSTORMS PARTS AND COMPONENTS Welcome to the Mindstorms Parts and Components topic. Here you can post information or ask questions about parts, components, sensors, etc. I will update the Index of this post when new content is available. WiFi Dongles Technicbricks.com - WiFi Dongle for EV3 Cables Botbench.com - Awesome EV3 Daisy Chain cable Sensors Eurobricks.com - Mindstorms Index
  3. We had great fun with my daughters building the Rubik's cube solver: http://mindcuber.com/. I built the version for NXT 2.0, but I see that there is a version as well for EV3. The same people have build a version powered by a smartphone that has beat the world speed record for solving the Rubik's cube:
  4. MajorAlvega

    LEGO Laser Harp

    Hi again. Another project I showed live last weekend at PLUG Braga BRInCKa 2016 - a LEGO Laser Harp: It uses a Mindstorms EV3 to read the light intensity on 8 color sensors. Each color sensor has a 1mW red laser pointing to it so my instrument has 8 "strings" or "chords" (I use two 3-to-1 input multiplexers in order to achieve 8 sensors). All 8 lasers are controled from one EV3 output. I started with 8 LEGO Power Function LEDs and it worked fine... at dark. But at a live show room I knew it would be impossible to use the LEDs (unless for very very short distances) so I opted for lasers. The EV3 runs ev3dev, a linux distro for the EV3. A python script controls the lasers and reads the sensors, sending their state to a linux laptop where another python script plays the notes on a software MIDI synth (EV3 with ev3dev can play MIDI but has not enough power to polyphonic sound so I had to use this client-server configuration). This allows the "instrument" to scale out so I can had more EV3 and more "strings". I don't know now how to play so during the exhibition my wife, when present, played some 8-note children tunes for the public. I have no live video but I have this one at home, still with LEDs and just 7-chords: Sound still needs some improvements (I'm not controlling note length) and hopefully in a later version I will read hands distance to control note amplitude. I will also use some kind of Human Interface Device to change the MIDI soundfont intrument "on the fly" so the artist can change from an harp to a piano or a drum whenever he/she wants (I'm planning to use LEGO Dimensions ToyPad since I can already read NFC tags with it on the EV3). Some technical details (and code) at my blog.
  5. Needs an update! MINDSTORMS EV3 RETAIL SET STARTER MODELS These robots can be built with the Mindstorms EV3 Retail Set(31313) TRACK3R TRACK3R R3PTAR R3PTAR SPIK3R SPIK3R EV3RSTORM EV3RSTORM GRIPP3R GRIPP3R MINDSTORMS EV3 RETAIL SET FAN MADE BONUS MODELS These robots can be built with the Mindstorms EV3 Retail Set (31313) BANNER PRINT3R – created by Ralph Hempel BOBB3E – created by Kenneth Ravnshøj Madsen DINOR3X – created by Lasse Stenbæk Lauesen EL3CTRIC GUITAR – created by Daniele Benedettelli EV3D4 – created by Vassilis Chryssanthakopoulos EV3GAME – created by Ricardo Oliveira EV3MEG – created by Martyn Boogaarts KRAZ3 – created by Marc André Bazergui MR-B3AM – created by Kenneth Ravnshøj Madsen RAC3TRUCK – created by Laurens Valk ROBODOZ3R – created by Mark Crosbie WACK3M – created by Martyn Boogaarts MINDSTORMS EV3 EDUCATION KIT STARTER MODELS These robots can be built with the Mindstorms EV3 Education Core Set (45544) Building Instructions & Program Description - Education EV3 Starter Gyro Boy Sorter Puppy Robot Arm MINDSTORMS EV3 EDUCATION KIT EXPANSION MODELS These robots can be built with the Mindstorms EV3 Education Core Set (45544) and the Mindstorms EV3 Education Expansion Set (45560)*. See briefings for more information. * Spinner Factory needs 2 EV3 Intelligent Bricks, 2 Color Sensors, 2 Touch Sensors, and ALL six motors. SPINNER FACTORY Project Description (PDF) REMOTE Project Description (PDF) ELEPHANT Project Description (PDF) TANK BOT Project Description (PDF) STAIR CLIMBER Project Description (PDF) ZNAP Project Description (PDF)
  6. MINDSTORMS EV3 OMNIDIRECTIONAL ROBOT INTRODUCTION The reason you are stuck with me as Moderator/Admin is actually caused by Mindstorms EV3. I proposed an Index for Mindstorms and Bonaparte figured I could make one myself. Resulting in me making one, and one thing lead to another. In 2013 TLG released a brand new edition of LEGO Mindstorms. Owning two NXT sets, which I had hardly used to build something cool, I was determined to change that when I bought the EV3 sets. I first bought the 45544 - EV3 Education Core Set set, and shortly after that I added the 31313 - Mindstorms EV3 (Retail) set to my collection. After some initial experiments both unit had been turned on approximately the same number of times as the NXT. This being a terrible waste of potential, I recently decided to start building the robot I have been planning in my mind for a long time. My goal is to build a fairly big humanoid(-ish) robot. Does that sound familiar? Of course it does, since my good mate Simon Burfield (Burf2000) has built a super cool humanoid robot recently. We also know him of the Wheelchair and Segway. And yes, he is a big inspiration to me. What I am aiming at is a Omnidirectional Robot with one or two arms and a Wall-e like head. The height of the robot will be approximately the size of a child, let's say around 120cm. Omnidirectional means allowing movement in all directions (more on that in the next chapter). Since I have no idea where this will end, I have created a WIP topic, in review style. I will add chapters along the way. When I add a new chapter I will post that new chapter and edit the original post. Feel free to comment, hint, tip, suggest, mock and ridicule Before we continue I'd like to give my man Burf and the guys at Rotacaster a big thank you! OMNIDIRECTIONAL WHEELS Here's the wikipedia description for Omni wheels: Omni wheels or poly wheels, similar to Mecanum wheels, are wheels with small discs around the circumference which are perpendicular to the turning direction. The effect is that the wheel can be driven with full force, but will also slide laterally with great ease. These wheels are often employed in holonomic drive systems. A platform employing three omni wheels in a triangular configuration is generally called Kiwi Drive. The Killough platform is similar; so named after Stephen Killough's work with omnidirectional platforms at Oak Ridge National Laboratory. Killough's 1994 design used pairs of wheels mounted in cages at right angles to each other and thereby achieved holonomic movement without using true omni wheels.[1] They are often used in small autonomous robots in intelligent robots research in the academia. In projects such as VEX Robotics, Robocup and FIRST Robotics, many robots use these wheels to have the ability to move in all directions. Omni wheels are also sometimes employed as powered casters for differential drive robots to make turning faster. However, this design is not commonly used as it leads to fishtailing. LINKS Some interesting links: Omniwheels Mecanum wheels Ball transfer unit Holonomic Festo After 15 seconds you can see the Kiwi Drive in action: Control using gamepad ROTACASTER Here's the complete lineup for Rotacaster wheels with LEGO hubs. From left to right: 125mm 48mm 35mm As you can imagine the 125mm version are for heavy duty applications. Since the robot will probably by quite heavy, I figured the bigger the better. There's also a 125mm version with 3 wheels instead of 2. However, this will probably suffice for my robot. The diameter of the 125mm is slightly larger than a 15L liftarm and the width is slightly less than 6L. CONCEPT Here's a simple concept sketch. And an artist impression of how the robot should look like. The end result will probably look nothing like this one, but it's nice to have an idea. PROTOTYPE I have started building the prototype. The idea was to buil in a modular fashion, but this early concept failed miserably. VERSION 2 The triangular shape poses quite a few challenges. Not that I hate a challenge, but I am contemplating on making a four wheeled version. The idea is to create 4 standalone wheel units, which can be attached to a center hub, possibly with shock absorbers. The red liftarms underneath need to be removed, because they will prevent the wheels to be mounted. This is just a simple LDD setup I drew, since we discussed Bob's problem with turntables. That made me rethink my setup. Some turntables and dog bones for the new setup. When using the modular setup for the wheels, I could easily switch between different setups, three or four wheels. My progress is what you see in the pictures. Now let's have fun discussing and mocking. Alasdair mocking in ...3....2....
  7. Hi all, A while ago I purchased the EV3Lights Led Controller by Mindsensors. The contoller is powered by a 12V adapter and it plugs into one of the sensor ports of the Mindstorms EV3 brick. To control the strip you need to download an EV3 Block and you are good to go. They even have sample program, which worked instantly! Christmas will never be the same!
  8. Very Excited about getting one of these, have been holding off for about 6 months to see when the next generation might come out. Snake robot sounds cool, depth perception will make for some interesting robots. EV3 Retail version EV3 Educational version Check out the Mindstorms Index here on Eurobricks for useful information: Eurobricks Mindstorms Index
  9. Well I'm finally back! The footage in this video is at least 1-2 years old, and I've been working on this project for even longer. I'm slowly working on completing this build, but I need your input and suggestions! My work-in-progress Lego Technic Customized Pickup Truck 42029 is being motorized with Mindstorms Ev3. So far, I have much of the chassis built. Two Ev3 Large Motors are used for the drivetrain and one Ev3 Medium Motor for the steering. I also have it set up so that a Lego piston engine can run while the vehicle is driven.
  10. Antonvh

    My Catfish MOC

    I built a fish that can be remote controlled. It can also swim standalone with an ultrasonic sensor. There's also a Youtube Video of the fish swimming. What do you think?
  11. After 2 months of work, I can finally present to you, The Zapper! This MOC was quite a challenge to build, not only because it's the biggest thing I've ever built, but because of the numerous design changes that I made while I was building it (most of which you can see in my posts below). I'm just glad I managed to finish it before the deadline, otherwise who knows how many more design changes I would have made... Video: Quick stats: Height (to top of support structure): 30 studs (24cm / 9.45") Width: 32 studs (25.6cm / 10") Depth: 34.5 studs (27.6cm / 10.86") Weight (with batteries and passengers): 1968g Now, you may look at those numbers and think that they're just measurements, but while that is true, there's also quite an amazing coincidence among them... You see, as I was typing it out, I realized that written as grams, the weight was a year - not just any year, but the EXACT year that the original Zipper (which is what The Zapper is based on) was first invented! Unbelievable, I know, but I can assure you that is the exact weight. Links: More about The Zipper: https://en.wikipedia.org/wiki/Zipper_(ride) Bricksafe page: https://bricksafe.com/pages/mocbuild101/tc14---the-zapper YouTube page: https://www.youtube.com/watch?v=kxbVNoT2SOc More photos: All versions (from prototype to final entry): Original post:
  12. Hello everybody! I've managed to find in Russia used EV3 for about $100. Upon receiving I'll have 15 minutes to test it and decide whether I want to buy it. My question is how can I effectively test electronic parts without a computer?
  13. The_Icestorm

    [TC14] Gyroscope

    I thought I might try to replicate this ride design for this contest. The ride consists of 3 spinning 'rings' with the riders attached to the innermost ring, and the ride rotates them around 3 axes. Some functions I want to include in the ride: Independent motorised control of each spinning ring. All motors external to ride, using a Mindstorms EV3 controlled system. Whole ride raises and lowers to allow riders to get on and off (like in the video) As I want all the motors to be external to the ride (having motors attached to the rings will cause wire entanglement issues) I have to somehow transfer power through the rings to spin the inner ones. Here's a diagram showing how the power will be transferred to spin up the inner rings. Red line is power transmission. Some pictures of the middle (green) ring and a basic mounting frame (not final). Black axle is input and tan axle is output.
  14. Please check these link: https://www.epo.org/learning-events/european-inventor/finalists/2018/munch.html And watch the video. "LEGO programmable robots" (basicaly Mindstorms ) and their "ufficial "inventors (i.e. those named on the patents) are candidate to the European Invento Award in the category of "industry". However there is also a "popular prize" that can be obtained with on-line vote. Check here: https://popular-prize.epo.org/i/i/gaute-munch-erik-hansen-dk-and-team/#inventor-gaute-munch-erik-hansen-dk-and-team It would be nice to inform as much AFOL as possible to support LEGO Mindstorms and its inventors. So please, let's support LEGO Mindstorms together P. S. I work at the European Patent Office. If you need more information, you can always contact me
  15. A music video for Daft Punk's Harder Better Faster Stronger, with Technic letters, filmed using a GoPro on a custom Mindstorms controlled rig. Made by this guy:https://www.youtube.com/user/fastythefastcat
  16. StudRobotics

    [WIP] Lexus LC500

    Here is a quick summary of a previous post. Right now I'm planning on a new project and I could use some help. It's a 1:8 scale model of Lexus' LC coupe powered by Lego Mindstorms EV3. Currently, I have the rear axle built off the instructions from the Porsche 911 GT3 RS set. I also made the engine for the LC500 on Lego Digital Designer and I am wondering if it is good enough to buy the pieces for it on BrickLink. I also want to add the following features: Four or six-speed paddle-shift transmission Retractable spoiler Detailed interior Fake V8 engine (but I would like to achieve moving pistons) Full independent suspension I would welcome some helpful comments about the V8 engine, axles, and the gearbox I planned to use before I order pieces on BL. Thank you.
  17. The Delivery Station unloads the train, separates the candies from the containers and delivers the candies to the visitors. The 2017 consisted of four parts: Push mechanism: pushes the containers-with-candies from the train Roller mechanism: rolles the containers-with-candies to the lifts Lift mechanism: lifts the containers to separate the candies from the containers Locker mechanism: candies are stored in lockers, to be opened with the ticket reader The order of the candies needed to be kept, so every visitor received the candy in the color he requested. You can watch the 2017 here (starts at timestamp 2m39s): For 2018, we keep the Push mechanism and the lockers. The part that will take care of separating the candies from the containers, is completely redesigned. The push mechanism however, was rather slow and - as you can see in the video - it needed quite some space due to the slider. So, that needed a redesign as well. You can see the new version here (click on the photo to go to our Flickr page): And of course a video: Enjoy, Hans
  18. This lego great ball contraption module uses a three sided wheel with "forks" to lift the marbles to the next module. The module is surprisingly reliable but it can take some time to get it running well. The stepper used to load the main mechanism works fairly well but it could still use some work, as you can see at 0:50 in the video it does not always work perfectly. The instructions, LDD file and part list are here. I used 1x3 technic half beams instead of the correct 1x5 ones in the instructions becuase LDD does not have them. The differential gear is not essential, it is only to make it easier to set the timming of the loading mechanism.
  19. Hello, I have a couple of questions regarding Lego Mindstorms EV3 1) Is it possible to program the EV3 brick using C++? Is it a viable option when programming? 2) Is there some software that could help me programme an EV3 robot with NXT sensors? I have not been able to find this option in Labview so far? Can you recommend me an alternative? I’ll be highly grateful for any answers.
  20. For those who have not following my topics, a small introduction about Sioux.NET on Track, a large full automated Lego candy factory, trains, lots of Mindstorms EV3 and all controlled by a Microsoft C# application. Every year, we show our layout at Lego World in Utrecht, the Netherlands. You can watch videos on our Youtube channel (www.youtube.com/user/siouxnetontrack) with the progress of all the updates and changes we make and you can also watch a video of the layout at Lego World. The video from 2017 and 2016: We always have an interface to the visitor, the so called 'PUI' which is an abbreviation for Physical User Interface. The visitor can choose the color of the candy (s)he wants to be delivered. The colors red, green, blue and yellow can be chosen. Okay, okay, its is more purple than blue. But in our layout, that is the blue candy ;-) Through the years, we have had several types of PUI's: In 2016 and 2017 we used a so called Wheel of Fortune as the color selector: The visitor had to pull the lever, making the wheel rotate. For an adult, this works fine. But lots of our visitors are little children, who have never seen a wheel of fortune. So some children pushed the lever, some pulled it but now hard enough and some children thought they had to pull the lever and push it down until it would touch the floor. Sometimes, I really thought the Lego would crack but fortunately it survived the hundreds of enthousiastic kids. For Lego World 2018, we've made an update of the Wheel of Fortune. Instead of a lever, we decided to use a motor for the rotation. But I found out that this was easier said than done. The main problem is the weight of the wheel, it needs quite some torque to start rotating. Plus I needed a free-wheel mechanism: when the motor turns, the wheel should turn. But when the motor stops, the wheel should keep rotating until it is stopped by the pointer. I first used the free-wheel mechanism from the lever: However, he torque was too much for this free-wheel mechanism. So, I started looking on the internet for a more powerful version. On the Youtube page of William Sargeant, I found a version that looked more firm. I made two of these and in combination with two EV3 L motors it is powerful enough to spin the wheel. Apart from that, I mixed the colors in the wheel. The result: And of course a video: I need to design two buttons that will be controlled by the visitor. A green button to start rotating the wheel and a red button that stops the wheel. I'll keep you posted. Thanks for reading and watching. Enjoy, Hans
  21. This lego GBC miniloop uses three technic lift arms to push the marbles up a ramp, then they fall onto another ramp. When a second marble falls onto that ramp it tips them down another set of ramps and back down to the start again. It is quite reliable if you place all the 1x1 "cheese" slopes straight but it can get stuck if they are not straight. (using 2x2 cheese slopes would fix this problem but I did not have enough in dark grey) The instructions are here. I also have a LDD file for it but I can not find any place to upload the file as it is not a standard file type, any suggestions?
  22. For the large candy container warehouse that I am building (click here to read more details), I need three more builds: A candy feeding mechanism. I need a mechanism that feeds one candy at a time to a conveyor belt. Color detection. The color of the candy needs to be determined. Systems that puts the candy into a container. The container can then be conveyed to the warehouse where it can be stored sorted by color. The color as determined in step 2, needs to be passed to the warehouse brick so it can store the container on the right level. Color detection (step 2) I started with step 2. To realize the candy sorter, I needed to know if a Pixycam (see www.charmedlabs.com/default/pixy-lego/) can distinguish the colors of the candy. The colors are not bright (like the Lego bricks), so I wasn't sure if it was possible. I created a quick setup to test the color detection: Next, I placed the four different candies (Fruit-tella) on the conveyor belt and programmed the camera for the four colors. This is the image of the camera, from left to right: (1) raw video, (2) cooked video (= mix of raw video + color detection) and (3) detection only video. Finally, I made a simple test EV3 program. With the addition that the detected block should be more than 20 pixels in width, it detects the candies in the correct color. Candy feeding mechanism Ok, so I have a conveyor belt with a candy on it. But how do I get the candy, one by one, on the conveyor belt. This is where the feeder comes in. I searched the internet for 'real life' solutions. I found out that a rotary feeder or bowl feeder would do best. I tried to make a vibratory bowl feeder (out of 16 circle gear rack elements 24121), but that didn't work. However, rotating the bowl seemed to work so I made a prototype based on rotation and gravity. The bowl is placed at an angle of +/- 20 degrees and then it just rotates in a steady pace. The result was good: it never happened that two candies were fed to the conveyor at the same time. The next step is to make a more solid version and add the color detection unit to it. I'll keep you posted. Enjoy, Hans
  23. This is my first WIP post on EuroBricks where I will show my progress on my newest build, an EV3-powered 1:8 replica of Lexus' newest flagship coupe, the LC500. The car will most likely be a combination of both the standard and the V6 hybrid LC, but it will have a V8. The body will also be orange. Here's a photo I found of an LC that looks a lot like the one I am shooting for. Features I'm planning to add: Four or six-speed paddle-shift transmission Retractable spoiler Detailed interior Fake V8 engine (but I would like to achieve moving pistons) Full independent suspension All I built so far was the rear axle for the LC. It's exactly like the one in the Porsche 911 GT3 RS set but more reinforced. I also made the V8 engine using Lego Digital Designer. I plan to build the paddle-shifting mechanism used in Didumos' Ultimately Playable Porsche 911 GT3 RS (the one with the tilted wheel) and pair it up with a gearbox. I currently am having trouble whether to motorize his gearbox with the EV3 motors or to pick a different one with less gears and friction. I also am having a little bit of trouble finding the right front axle, though I like the one that Didumos put his Porsche because of the fact that is has two shocks for each wheel. However, I find it very difficult to fit the V8 engine in the middle since the axle is made for a rear-engine car. Here's a poorly drawn render I made of what I'm trying to achieve with the front axle. And here's the chassis in the real LC and the measurements for the LC Lego model. Overall, I'm excited about the build. I would welcome some helpful comments about the V8 engine, axles, and the gearbox I planned to use before I order pieces on BL. Once I start working on the body and aesthetics, I would appreciate some input with that as well. I can also give you the download for the .lxf file of the engine if you'd like to check it out. I look forward to replying to your comments and sharing my progress. Thank you.
  24. I'm Yves from Montreal city, Quebec province in Canada. While I don't consider myself a true AFOL as I don't build big mocs, I still love legos and I love to find out the unlimited creative talent of others. I'm not into castle, themes etc. I'm more into buildings, vehicles, technics (I have many technic sets... not the recent ones). I've been working in the industrial Automation fields (PLC = Programmable Logic Controller) for 30 years and I also own few mindstorms sets :) But I did not really "played" much with them yet. I've been off of the scene for about 10 years but recently, I stumbled on my old Lego Interface B (9751 - 70909) and had an Idea. 10 years ago or so, I did some VB.Net project to control this old baby. Was OK, certainly better than nothing but still lacking of some friendly programming language like we have in Automation. Then I had an idea to revive the Interface B. I'm going to share in the proper section if I can find it :) Here's my old brickshelf gallery: http://www.brickshelf.com/cgi-bin/gallery.cgi?m=YvesLev
  25. This is my simple Lego car chassis for Mindstorms and Technic beginners. Features Rack-and-pinion steering Full independent suspension 1:3 gear ratio driven to rear differential I built this chassis as both an experimental project but also an educational one to not just me but people starting to make their own cars with Mindstorms and Technic. If you're looking for a chassis design that may work for the build you're creating (a sports car, sedan, or small truck) then I hope this helps you and I would look forward to seeing the finished result.