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Found 226 results

  1. Hello! I own the 8527 Mindstorms NXT set, in like new condition, and am looking for a buyer! All parts are present, including the red and blue balls, CD-rom, user guide, and original box. It was assembled once, and then shelved. Price: Please send me an offer! I am looking for something a little lower than similar Bricklink listings but I am willing to negotiate. Shipping: I will be shipping the set from USA. I am looking for sellers in North America so I can provide free shipping, but if the buyer is out of country then I might have to add part of the shipping costs to the total price. Please DM me if interested! (sorry for the blurry photos, these were taken on my camera and not my phone)
  2. So I was working on a simple rc program on my computer today with my new 51515 set and was trying to make it rc using the keyboard (up arrow=forward down arrow=reverse left arrow=left right arrow=right) But it is hard because there is no "when no key pressed" block to my knowledge. The robot I am using is THIS. Any help would be greatly appreciated.
  3. Thought I'd create a thread to just post WIPs of my MOCs, or neat mechanisms. Finished: Generic Muscle Car
  4. Back in 1994, Bullfrog Productions created the video game Theme Park. Since 2016 I have been working on recreating the game... using LEGO. It has now been 6 years, and I am not yet done, so what is taking so long? Well. I want the visitors to try out the rides when possible - not just stay inside of a single ride. Rather than continuing posting a new thread for each module, I will use this thread for all the content regarding this project. This first post will contain an index of presentations, and will be updated as new rides and other content is finished. Presentations of Rides Bouncy Castle in separate topic Plane Flyer in separate topic Merry-Go-Round in post #5 Observation Tower in post #5 Big Wheel in post #5 Space Shuttle in separate topic Haunted House in post #7 Parasol Chairs in post #7 Roller Coaster in separate topic Shops Mr Walley Ices in separate topic Duck Shoot in separate topic Big Time Fries in post #5 Coconut Shy in post #5 Coffee Shop in post #5 Pokey Cola in post #5 Race Track in post #9 Balloon World in post #13 Saloon in post #16 Features All, but the Fountain in this post: Outhouse Boggy Crapper Super Toilet Apple Tree Birch Tree Castle Wall Lake Lamps Oak Tree Orange Tree Palm Tree Private Hedge Rose Bush Spooky Tree Tree Stump Fence Tropical Bush Weeping Tree White Fence Fountain in separate topic
  5. Dear All, LEGO lasts forever – assuming “forever” is exceeding 6 decades – which surely will happen (or has happened already?). I still have bricks from 1965 (my first LEGO set was #323 – a push along steam train running on rubber tires …) – that still have very good clutch, colors only very little faded – and seamlessly fit into 2017 sets. Almost as long as I live, LEGO has been part of my life. True, there were dark ages from the late 1970’s to 1996 – but then it instantly came back – everything: The excitement about a new model, just another LEGO box, new bricks, colors … and it never disappeared since then, in contrast. 1998 was the ultimate rush back into the LEGO world: The Mindstorms RIS system – the RCX (at that time without the “1.0” extension) – it blew my mind. And since then a somewhat larger collection of all themes has assembled over the past 20 years. Building over multiple themes is my brick-philosophy. During my dark ages computer technology became my favorite hobby. The “IBM PC” was lightyears out of reach but other miracle machines came up: The C64, the Sinclair ZX81 – and that one was within reach of my limited budget! 1 kByte of memory and a 16 kByte dynamic RAM extension I built myself. “Tri state TTL bidirectional bus drivers”, the 74LS243 – and no internet, that remained to be invented. And it went on – the ZX Spectrum with 16 kByte of on-board memory got a 64 kByte memory “upgrade” – switchable in two banks. It was fun. Today, TTL chips are fading out and 64 kByte would result in the worst digital “photo” ever … I am not whining – so many wonderful new things have emerged! What really shocked me though was when TLG did not even think about making a 64 bit driver for the “perfect” Mindstorms USB IR/VLL tower. That beautiful communication hub for all RCX1.0, 1.5, 2.0, Scout, Spybotics, MicroScout, CodePilot bricks one is truly dead since 64 bit operating systems have taken over. At least this is what I have learned from the internet after years of searching. The next shock came around 2002, when .NET came up and Microsoft said “no more VB6 development at all”. VB.NET was so different from what I knew. In the following years I stuck to VB6 … my fault, sure. But I am moving slowly as time for LEGO is rather limited. XP vanished, 32 bit OS came out of fashion – and all that cool stuff – the Mindstorms software, the NXT software, NQC for RCX, RobotC for RCX … and all my VB6 programs – almost “gone”. Well, I kept of course my Dell Latitude E6500 laptop running WinXP SP3 with all that stuff installed and I still have it! Carefully backed-up everything and there it is, slowly aging. I hardly like to play with that thing – I don’t want that it gives up, which will eventually happen of course. Yes I know: “Install XP within a virtual machine” – but that did not work to the extent I would like to use a “LEGO programming and playing workspace”. The one thing that changed everything were internet rumors about the old Mindstorms RS232 tower working well with NQC/BricxCC on a 64 bit Win7 machine. So for the past couple of days between Christmas and New Year’s I was browsing the net, installing this and that, copying stuff from my old XP machine … and: BINGO. It all works! Everything works on my rather new DELL Precision 7510 with Win10 Professional as OS. All the old-back-from-the-late-1990’s stuff! OK, I know, not everybody will be as excited as I am. But I believe LEGO lasts forever – and now all the software I love so much, as well as all my old-fashioned programmable bricks (there are currently 9 RCX1.0, 6 Scouts, 10 MicroScouts, and 1 NXT PBricks doing work on my train layout) are directly accessible from this laptop, and they are programmed/operated using NQC/BricxCC, NXC, NXT-G, RobotC, the Mindstorms SDK 2.5, and most importantly VB6 SP6 programs – all natively running on a Win10 64 bit platform. A dream came true. And for all old or old-fashioned Mindstorms PBrick heads, for all who never managed to get their head around .NET stuff, for all who still believe that RCX’ and Scouts are miracle thing: Here is how I got it to work: Assemble some software from the internet: BricxCC (free, latest version from 2011) The Mindstorms Software Developers Kit (SDK) 2.5 (free on Philo’s homepage) RobotC for RCX 2.03 (which is free as well). Don’t download the 32 bit tower driver. It won’t work. The NXT 64 bit driver from TLG VB6 SP6 from Microsoft VB6 cumulative update for SP6 from Microsoft Get out the original CDs for: VB6 (SP5 or higher) The NXT-G 2.0 software suite – if that is not at hand, TLG’s Mindstorms website has it Assemble some required hardware The Mindstorms RS232 tower. They came in 1998 with the original RIS system – and they are widely available at BrickLink for about $5. Don’t forget to put a fresh 9V battery into the battery compartment on the back. Slide the range knob on the front to the left (short range). An USB2RS232 converter – I tried a (randomly picked) LogiLink converter, which works just fine. A PBrick of type RCX, RCX1.5, RCX2.0, Scout, or Spybotics. The next steps are for proper tower access: Plugin the USB2RS232 converter into the computer and let it find and install the driver (either shipped with the converter or on the internet). Open device manager (Windows key + X, select “Device Manager”), expand the “Ports (COM and LPT)” section, find the “USB Serial Port (COM X)” entry, double click it, choose “Port settings” then “Advanced” and make sure the COM port for this device is in the range between 1 and 8. Otherwise BricxCC and other old programs will not find the USB/RS232 converter = IR tower! It cost me some time to figure that out. When all COM ports in this range are taken by other devices, move one of them to the next free COM port far up and then manually (modern hard/software has no issue using COM ports in the range exceeding COM 8!) assign the converter to the now free COM port in the 1 – 8 range. Plugin the IR tower cable into the USB2RS232 converter. Next is getting access to RCX, RCX2, Scout, and Spybotics PBricks via BricxCC – this will also let you download the latest RCX firmware is case it is “gone”: Install BricxCC (full install) – this comes with NQC and many more things, e.g., the RCX firmware downloader. Put a PBrick from the list above into the IR tower range, a couple of inches away. Start-up BricxCC – it will try to connect to an RCX PBrick and most probably fail (“Cannot find brick. Switch it on or move it closer and press OK”). Press “Cancel”. Select “Tools” in the menu, go to “Find brick” and in the window that opens, select the correct COM port manually. Also select the correct PBrick. An RCX, RCX1.5, or RCX2 without firmware will correctly reply to the “RCX-type” in this window. The LED in the tower should come on and the program should connect to the PBrick, which is shown by many of the menu icons now being enabled. Download firmware to the PBrick (RCX, RCX1.5, RCX2) and that is done. Next is RobotC – this very straight forward: Install the software and run it. Select menu entry “Robot” and then “Platform type”. This should be “LEGO Mindstorms RCX”. Select menu entry “View”, then “Preferences”, then “RCX communications port” and select the COM port you have the USB to serial converter on. Download the required RobotC RCX firmware – and done. Next ist NXT-G – again very straight forward: Install the NXT-G software. Install the 64 bit NXT driver – done. Finally VB 6 – this is a little more elaborate: Install the Mindstorms SDK 2.5 – this will register one essential DLL correctly (vpbcom.dll). I don’t know how many times I tried that manually – I am too old I guess. Don’t install any USB tower software – it won’t work. You can test a PBrick connection using the “ScriptEd” program – upon starting it, the IR Tower LED should come on. This program also lets you download firmware or monitor the IR tower. Very handy for checking things. Install VB 6 from the CD. Now the trick here is that a full default install won’t work. Follow the instructions of this youtube video. There are many others, but this worked for me. I did the install directly from the “VB6 Professional CD” I still had (the video assumes you have an enterprise version but that makes no difference). The single most important point is to uncheck either the entire “Data Access” check box during the preparation steps for the installation or select “Data Access”, click “Change Options” and uncheck the “ADO, RDS, OLE DB Data providers” entry. The let the install program do what it has to do and be patient at the end, when it attempts to register all sorts of things. That may take several minutes, at least on my machine. I had a cup of coffee, did some other things and when I came back, it successfully finished the install. Install VB6 SP6 in case it is not already on the CD. Install the cumulative patch for VB6 SP6 in case it is not already on the CD. Right click on the new VB6 icon in the start menu, go to “Properties” and select “Run in XP SP3 compatibility mode”. Run VB6. Open or start a new project, then select “Project”, “References” and then tick the “LEGO VPBrick 2.1 Type Library” – and access to the above PBricks is established! The Mindstorms SDK has a PDF explaining the calls to the routines you need for that (e.g. ”FindPort” or “OpenPort”. This is it. At least on my computer. There may some other things to do on other machines, but it really appears to be doable. Just in case you want to program with VB6 “forever” or more importantly run all of TLG’s miracle PBricks from the latest Microsoft OS … as I do. And Yes I know, neither Microsoft nor any decent programmer will endorse this, in contrast. But then: It wasn’t my fault that TLG never published a 64bit driver for the Mindstorms USB tower. Nor did Microsoft ask me whether or not it would be OK to abandon VB6. All the best Thorsten
  6. Hello everybody, I am finished with my entry but I did not have time yet to post any WIP content. Nevertheless I took some pictures during building, so I can show you my design process now: The CRAB - ROV - Camouflage Robot for Arctic Biotopes - Remote Operated Vehicle The idea was to build a sideways walking robot with an appearance like a crab. The leg kinematic is based on the Klann linkage: https://en.wikipedia.org/wiki/Klann_linkage This kinematic is actually used in some underwater walking robots right now, so I thought it to be reasonable to use it in some arctic vehicle. At first I created a test vehicle with 8 legs: Crab robot WIP 2 by n8walker23, auf Flickr Crab robot WIP 1 by n8walker23, auf Flickr This proof of concept went fine, the legs can easily move, rotate and lift the vehicle. The gearing down of the drive motors is not even necessary. The next task was to shrink that mechanism, as a smaller vehicle would be even more efficient at moving as fast as possible without straining the linkage or overloading the motors. A kinematic for the claws had to be designed as well. My layout would be: one motor for back four legs, one motor for front four legs, and one motor for each claw. So this was the next stage: Crab robot WIP 3 by n8walker23, auf Flickr Crab robot WIP 4 by n8walker23, auf Flickr The motion of the sensors (the eyes) is coupled to the motion of the claws and it has some simple bodywork. The eye motion can cover an area of roughly 45 degrees. This design was followed by the next optimization loop: Crab robot WIP 5 by n8walker23, auf Flickr Crab robot WIP 6 by n8walker23, auf Flickr I am quite happy with the bodywork at this stage. The rear propellers are driven simultaneous with the rear legs and the front legs are connected to a two-cylinder fake engine. The weight of the robot was 787g. Roughly 350g of that are the electronic parts. Now it was time to streamline the construction, decrease part count and weight and improve building quality. At the next iterations the robot would be modular. This made it much easier to apply little modifications, as it is not necessary any more to disassemble everything all the time to get access to critical regions. Also, I replaced the fake engine by a fan, as i found a combustion engine not really fitting to the concept. Crab robot WIP 7 by n8walker23, auf Flickr Crab robot WIP 8 by n8walker23, auf Flickr Crab robot WIP 9 by n8walker23, auf Flickr Crab robot WIP 10 by n8walker23, auf Flickr This is the final stage of the robot. Weight is reduced to 738g. Now I need to do some programming to have a nice remote control and to get good pictures and maybe a video as well. Regarding the colour scheme, I tried some variants, but some choices are already set by the colours of the mindstorms parts: Crab robot WIP 11 by n8walker23, auf Flickr I think (e) is looking the cleanest, so this scheme is applied right now. Most fitting to the contest would be (d) i guess, with mostly white and yellow. But I think it is a good idea to use the turquoise of the mindstorms box somewhere else in the model so the box does not stand out too much. This leads to a solution like (b), but I think, that is too colorful. What are your thoughts on that?
  7. The silicone buttons piece on my MicroScout from 9478 Droid Developer Kit has suffered tearing on two of the buttons, making it so pushing them takes poking a toothpick or similar inside. Does anyone have advice on repairing the piece, or where I might get a replacement? I tried calling Lego, no luck there.
  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. uses spike for programming and there are 2 versions using small and medium linear actuators, the code isnt perfect though and the small one skips easily, getting carbon axles for better accuracy when retracting and expanding the actuators so i dont get a big explosion of actuators and twisted axles again one medium actuator suffered :( planning to get some metal uni joints for turning this into some crawler beast
  10. Hi everyone, I'm Shah, and I like making models using just one Mindstorms kit. As I create new builds I'll add them to this post. Would like to share my latest MOC, a steamboat loosely based on Steamboat Willie. STEAMBOAT WILLI3 by Ahmad Sahar, on Flickr STEAMBOAT WILLI3 by Ahmad Sahar, on Flickr STEAMBOAT WILLI3 by Ahmad Sahar, on Flickr Short video clip and building instructions here. Hope you like it.
  11. Hello everyone, This is an old topic but I need your help. I acquired the set 9731 LM Vision Command without the original software but I have already found the version for Windows 98. Now i'm searching for the English version for WinXP and I can't found nowhere. At BrickLink, only other languages are on sale for WinXP :( Can someone share the installation CD in English of LEGO Mindstorms Vision Command for WinXP or where can I download the software in English?? Any help appreciated...
  12. A small project has been to try to use the Spike Prime acceleration data and Newton’s Laws of Motion to calculate distance moved by a vehicle. The upshot of working through this has been: . that the Lego documentation is woefully lacking. ..it is not at all clear what the units are although given the the z acceleration is of the order of 989 I imagine that to be gravity in cm/s/s. . even though the hub is at rest it reports small accelerations on x and y. . applying the code ... integrating acceleration over time... the results are inconsistent even at standstill.... more so under movement. It is possible that there is a coding error but unlikely (famous last words!) So.... any ideas gratefully received! Thanks
  13. This set was signed by the LEGO Mindstorms team. I also got a special letter from them.
  14. Please let me know your honest opinions about my OFFICIAL robot Neptunian. I would love to hear some criticisms so that I can improve in the future. You can find it in the LEGO Mindstorms robot inventor app if you wanna learn more about it, but i will summarize its functions here. Basically it has two modes. In the first mode, it spins around randomly until it finds the target. then it will open its head and fire. In the second mode Neptunian enters the obstacle avoidance mode, where the robot avoids obstacles like walls normally. However, once it sees an unexpected obstacle, such as if you place your hand suddenly in front of the sensor, it will open its head and fire Here is my video of my robot Neptunian. It has even been featured by Sariel's Bricks & Pets in his review of the mindstorms set:
  15. Connection Lego and Fischertechnik. By combining both systems we can enjoy their advantages. The data and command exchange occurs on 2 levels. There is a serial duplex connection via the hubE and the DE0-Nano_Soc board. On the other hand, the data lines of the other hubs are also read by the board. The latter can thereby process data in real time and without interaction of the running software. This data can mainly be used by the TXT Controller to display the results on the PC screen. Motor speed, position, sensor color information, distance information and pressure can all be read out. From the Lego side there is no need to write a program. The DE0 board simply listens in real time. The DE0 board responds very quickly ( only a few usec). The connection is via 115200 baud but can be much faster if needed. I now need to work out some protocols to build a large application. Lego-Fischertechnik by Frans, on Flickr With the DE0 board, I have up to 120 inputs available. I can now use those to send to the lego hub and process them there. Commands can also be sent from the lego hub to the DE0 board and so on to the FT Controller. The possibilities are immense. I hope to present a larger project a little later. On the Fischertechnik side, I have a lot of outputs. Now I can already connect 16 motors, 16 servos, various digital outputs, etc. Frans
  16. im finally done with my tank moc! i hope you like it if possible like and share it on insta & facebook (links below) it comes with a detachable trailer and a 3DOF arm thanks @thealvacado for the arm I've improved the bracing of the 8 tooth to the 40 tooth gears as they were constantly popping out also changed positioning of some things there is a 4 pin connector on the end so that its much easier to change the attachment on the end I hope you like it :) spent quite a while making this https://www.instagram.com/p/CdnoQmspEut/?utm_source=ig_web_button_share_sheet https://www.facebook.com/544771685/posts/pfbid032Jr1QQfEXsTZbEqxBUDAR7LWMGfGzE9wpor93kkCivLbZfqt3ujtvHVqyUvEDkpzl/?d=n https://youtu.be/5j2kXYvjlAM https://youtube.com/shorts/PzlFRePGSP4?feature=share https://youtu.be/X7KmZLrbvlw https://flic.kr/s/aHBqjzQeX3
  17. Hi all, Just want to share with you a RI5 creation that I have been working on for a few weeks. It is a biped robot built with 5 control+ motor and the Robot Inventor hub. https://www.youtube.com/watch?v=qfAfLVE8jtw The next step is to build the same bot using Control+ and hopefully by the time the build is done I will be able to program it using the new PoweredUp App. Enjoy!
  18. Allow me to finally introduce a project that has been a source of many sleepless nights, frighteningly advanced hair loss, and multiple failures since 2016: Moving Minifig Machine Like GBC, "MMM" consists of modules. The module in this thread is a Mindstorms-powered fun fair ride where the minifigs move in, jump, and then leave. See the short introduction here: The idea was born at a LEGO event. The audience always loves GBC, but most builders prefer to build city layouts. MMM is an attempt at combining the movement from GBC with minifig-scaled buildings. Modules are based on raised base plates. This allows for the conveyors and mechanical components (such as a Mindstorms NXT as seen in this module). The front wall allows the builder to showcase the name of the module. It can also be left blank as seen in the adjacent modules, or you can tape printouts onto them with some interesting information of the modules. See building instructions for standard modules here: https://brickhub.org/i/themes.php?theme=MMM The design of this module is based on the classic game Theme Park by Bullfrog which was released in 1994. The "graphics" of the modules I have built are form the 1995 port to the Playstation. This screenshot is from the DOS version: You can see a very fancy version of the in-game model in the cut scene at 8:17 of this video: The module uses a single L-motor for the two tracks. It uses a mechanical "diode" to make the outer track go in a single direction, while the other can change direction. I show it in detail in this update: An NXT motor is used to raise and lower the jumping pillow, while the walls move in and out. Finally, an M-motor is hidden in the "pillow" to move the tracks on it that connect with the outer track at an angle which allows for entry and exit that works fairly reliably. You can see me testing it in this video: I have tried a variety of designs for the pillow which would allow it to be built in red. Designs include rolling cylinders and free-spinning wheels. All of these attempts failed horribly, and I decided on compromising with a gray pillow. I know it is not much, but I hope that you can see the idea behind this. The project might fail - it has done so many times - but I also think it has potential. I have more modules planned and hope that you will enjoy the presentation of them. And if you think that I'm exaggerating when I say 2016, I must begrudgingly say that it is true. Here is an unlisted video of the layout as it were in 2016. The modules have since then been redesigned:
  19. The last years, we have used a NXT brick for controlling the train. For Lego World 2017, we want to use EV3 bricks only. Since the RFID sensor is not supported anymore, we needed another way to determine the train location. I have build a proof of concept of a loco: Wheels are directly connected to a EV3 medium motor Location detection based on a color sensor (the combination of yellow, red and green makes a unique pattern) And it works fine! A video of this proof of concept: Of course, the train needs a bit (... ) of restyling ;-) Enjoy, Hans
  20. Hi all, My first post here. Just in case anyone wants to have a game of air hockey with their brick you can find a demo and build instruction at the following link. Have fun and looking forward to your feedback (build instruction and code is at the end of the video). /CheungsLegoCreation
  21. Does anyone know of an app or application that works with the old ev3 Mindstorms and technic power functions?
  22. One of my NXT servos is exhibiting some odd behavior. I had to replace a servo for a different reason and this might be the replacement, but I'm not entirely sure as I didn't mark it as such. In any case, I'm curious if anyone else has seen this and knows the cause. With two servos that act as expected, I can place a single Move block in the program and use any of the duration settings and both servos will run and stop when programmed or run continuously if "Unlimited" is selected. However, when one servo is replaced with the misbehaving one, regardless of the duration setting, the latter servo will run continuously and the good servo will twitch as if it's about to run, but stops immediately. I have to end the program to get the "bad" servo to stop. If I place the Move block inside a Loop set to "Forever," the above behavior will be identical except for one scenario. If I set the Move block duration to "Unlimited," both servos will run and can be controlled by the Loop's "Control" setting, i.e. they will either run continuously or run and stop as set by the loop control setting. Simply using individual "Motor" blocks to control the servos does not solve the problem. There are good and bad programming scenarios with those as well with regard to the bad servo. The best guess I can come up with is that the bad servo is either not sending or not receiving a feedback signal, maybe both. I did wonder, though, if these servos have any firmware in them that might behave differently depending on when they were made. This isn't a fatal flaw as I can use the servo, but I am curious what might be going on. Thanks, Paul
  23. So I bought an rcx 2.0 and have some power functions extension cables that can also convert between PF and 9v. If I would connect PF to an rcx would it work?
  24. Hello, First topic post here. =) So I've built a 6DoF robot arm with a motorized end effector and have so far only done the basic programming of the joint movements using python (ev3dev). I have looked at implementations of reverse kinematics and RRT path planning on other robot platforms and would like to implement it for my arm. Anyone on here has done it before and would like to share how they've done it? Looking for collaborators on the programming side if there is any interest. Here's the link to my very basic code so far: https://github.com/ninoguba/ev3-robotic-arm Thanks, Nino