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Showing results for tags 'ev3'.
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welcome to the mindstorm section of the Akiyuki project, this topic is for the modules of Akiyuki that have mindstorms in them or use mindstorms in any way. as always I would appreciate any information (pictures/videos) of these modules working or built here's what I know so far: Ball Cleaner EV3( in progress by @Juroen) program by Akiyuki (stud.io file available instructions coming soon) Container Transporter NXT instructions available here by @Courbet program by @9v system available here Fast Ball Sorter EV3 instructions by Courbet, built by Courbet and Mogwai, program also by Courbet and Mogwai, Render by Blakbird(instructions available) building instructions, program for the ev3 any help would be good to get these modules made into instructions (programs will also need to be made) 9v system -
Hello ! Here a little video of my new project, a wine pourer for alcoholic people , the software is not operationnal today. i will post a new video when the project will be finished ! see the famous domestic robots: Light a candle, Open a yogurt, cut a cake -
This is my first fighting game for the EV3. Going to completely remake the one I started a couple years ago. New programming, movements, sounds, build, etc. I will update this thread as often as I can, although subscribing to my new YouTube channel would be much easier. :D Support me on Patreon! https://www.patreon.com/M1dn1ghtN1nj4 New channel, LegoRoboGo: https://www.youtube.com/channel/UCfj_fY7gc3rqKueez_H76vQ New videos will be posted above the old ones, so you don't have to scroll down for ages looking for the most recent video. Version 1 Final: Update 2. Making progress Starting out: Original version, which has since been recreated in the videos above: -
Hey everybody, I'm Noah. I've been a Lego builder pretty much my whole life, up until a couple years ago, when unfortunately, due to a financial crisis, I was forced to sell a lot of my stuff, including my EV3 Home kit. I just purchased a new kit, and it will be arriving next week. I wanted to get a new YouTube channel going, where I could build to my hearts content, and share my projects with everybody. That channel is called RoboGo. I have quite a few projects already lined up, and partially build in LDD, I just need the physical kit to make it a reality. You can find that new channel at the link below: https://www.youtube.com/channel/UCfj_fY7gc3rqKueez_H76vQ I also have another, slightly unrelated YouTube channel, where I have been growing my subscriber count pretty quickly. Not directly Lego related, but still worth a look if you're curious what my previous work has been about. Link below: https://www.youtube.com/m1dn1ghtn1nj4 Hope to see you guys around. I'm pretty good at replying to as many messages as I can, so if you have any questions or comments, hit me up!
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I’m getting more and more interested in the programming that Mindstorms can offer, including the surrounding possibilities, hook up to a computer and such. I am from time to time a programmmer in C#. But ev3 is so old! Should I buy it anyway, aim for something else or keep my fingers crossed, waiting for “ev4”? -
The 2017 Ford GT is effectively a GTE race car converted to road use. After the 2016 race car won at Le Mans, exactly 50 years after Ford's historic win with the GT40, they had to build some road cars for homologation purposes. These road cars have a 3.5-litre twin-turbo Ecoboost V6 producing 647 horsepower, and an extreme amount of downforce from the active rear wing, diffusers, front splitter and those gigantic flying buttresses on the sides. The interior is sparse to reduce weight. The initial allocation sold for around $500,000 each, and Ford received more than 5,000 applications for 500 cars. Getting hold of a car is extremely difficult, and even those who are successful must wait for several years to receive their car. The recent incident of Ford announcing that they would sue John Cena for selling his car (supposedly for profit) and breaking the terms of the contract is a testament to how sought-after this car is. After several months of rather intermittent building, I've finally finished what turned out to be a prime example of how not to manage a project. Anyhow, at least the car is finished so I can get to work on building something I'll hopefully enjoy more... Initially, I planned for this to be a fast RC vehicle, using every single motor that I own. That meant three EV3 Large motors, a PF XL and a PF L for drive, an EV3 Medium for the gearbox and a PF M for the steering. However, as I chased the GT's distinctive styling, the car got heavier, more fragile and closer to the ground. In the end, the car would barely move in anything other than 1st gear, and it would scrape its bodywork on the ground. That's what happens when you change tack mid-way though a build. However, at least I think I can call this my best-looking car model to date. The car has a 4-speed sequential gearbox mounted behind the rear axle to save space and take advantage of the car's huge overhangs. There is no suspension to reduce complexity and because the model is a little too narrow for an independent driven axle to fit. All the motors in the drivetrain are hard-coupled together (yes, I know it's a little naughty, but the gear ratios are closely matched and the stresses put on them by this are probably dwarfed by the load caused by driving the car uphill). The steered axle is extremely simple with just a little return-to-center mechanism. This is in order to leave enough space for the PF battery box under the bonnet. There was just about enough room to have a convincing-looking cabin and seats, although it is considerably smaller (compared to the size of the whole car) than in real life. The rear wing is mounted on a scissor lift system to raise or lower it - there wasn't much space over the gearbox so I had to resort to using those ugly yellow beams. The doors are hinged about the A-pillars in order to give that characteristic motion, opening both upwards and outwards. An elastic band puts some tension on the mechanism and keeps the door either in the closed or in the open position. Styling-wise, the Ford GT is quite a challenging car, but at least it is more angular than curved. I did my best to focus on the characteristic features: the two big vents on the bonnet, the giant side vents and flying buttresses, the red circular brake lights and the carbon sill running along the length of the sides, part of which lifts up with the doors. I don't have that many pieces, so I had to do a few colour-mismatches, but I tried to keep to the grey theme. In the end, the car is easily-recogniseable as a GT, and that's what counts to me. Here is a video showing pictures of the car and a time-lapse of building. Unfortunately there's no driving footage (it would be pretty underwhelming anyway), but you can see the opening of the doors and raising of the rear wing. Music is composed by me as usual. My next build will be what this one failed to be: an incredibly fast RC car. This time, I'm going for minimal bodywork and no gearbox. -
Hello everybody. Recently i found a segway program on ntx with extension .rbt. I need to convert it into .ev3.I tried, but it didin't work. Who can help me? -
This is my new creation! I tried to build beside the windmill a 3 fields economy with many operational steps the farmers in the middle age worked on. Hope you enjoy! medieval windmill by kofi, auf Flickr
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Here is the problem, we have already tried something and it didn’t work. Thanks
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Hello I'd like to share with you my last model, the colour ball tracker. This robot is able to track and catch a colour ball in a room without any border. The choice of the colour is made at the beginning and you can choose several colours. All the problems are managed, like mistakes, wrong things and so on technologies used are lego mindstorm and pixy cam thanks for you comments and requests !!!
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Hi! I will show you two photos of my new project: The EV3MathBuggy with the following functions: controlled via iPad or iPhone (Using the Gyroscope). Integrated web service. selecting some defaults or typing any kind of mathematical functions. The EV3 MathBot will drive the function. Using mecanum wheels. A video is coming soon. Andreas -
Let me introduce you my biggest and most complex MOC so far - COFF3 BOT. Once I was contacted by a man from HP (Hewlett-Packard) and he asked me: "Are you able to build LEGO robot that would supply Nespresso coffee machine with capsules?" It sounded interesting to me so I set meeting with him to know more. He explained me that they got coffee machine with bluetooth so you can turn it on from your smart phone. The problem was that you have to insert capsule manually into coffee machine and they were looking for some "remote control LEGO solution". Soon I began working for him and it took me about 3 months to finish this robot. It was built mainly out of LEGO Mindstorms Education and LEGO Technic Bucket Wheel Excavator. It contains about 2500 parts. The most difficult part of development was building this robot. Programming was piece of cake. Robot in stand by position. It has 3 storages for 5 capsules so you can load it with up to 15 capsules. Robot without coffee machine. Notice the rail that helps robot to stay with coffee machine. Detail of three mechanisms that insert capsules into slot on the top of coffee machine. Detail of gearbox - there are three parallel gearboxes that switch large motors between operating storages and movement of robot. I had to use gearboxes to avoid using another EV3 brick. This series of gearboxes is part of robot that causes most of its failures. EV3 brick works also like counterweight for jib. I've attached it in such way to keep access for battery charger. And how it works? You turn it on and it moves to stand by position. Then it waits command from some bluetooth device that determines number of storage - you can choose out of three different capsules for your coffee. When robot receive it, it turns over coffee machine and opens its slot for capsules. It does it by pulling little lever on the top of coffee machine. Then it releases chosen capsule into slot and closes it. When it is done it sends you message that you can turn on coffee machine. I will add link to video when HP releases it (I am not allowed to upload any video of this robot). And finally one fun fact: cost of this coffee machine is about $200 and cost of LEGO bricks for this robot was about $800 (excluding my work).
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Quandary. First I apologize for the long post. I have finished the first stage of a large industrial MOC. So far it has 4 motors for several models AND 4 channels on an sbrick for an overhead crane. ( with more to come) I'd like some suggestions as to how to proceed with the animation/automation. I'd like to use a laptop as a central control point. I understand that sbrick is working with scratch on a pc interface. I have read that a pc running windows can communicate with an EV3 with Bluetooth protocol. Has anyone done any work with any kind of an integrated environment. Ideally I would like to make the EV3 sensor readings available to the pc and then issue commands to either EV3 motors or sbrick motors. The sensor capability of the sbrick is not versatile (at this time) to use a full range of EV3 sensors. Am I "beating a dead horse" with trying to keep the Ev3 + sbrick + pc in the loop or should I do a switch to Ardunio / Raspberry Pi / NanoPC etc? I 'was' an experienced programmer before retiring and am leaning towards a micro solution to get in a single language environment. Any help/comments would be appreciated. If you would rather continue this topic privately, drop me a message. Thanx -
"The Pursuit of Perfection" - slogan of the Lexus brand. I'm now back with my greatest Lego creation ever. A 2010 Lexus GX 460 with EV3. It's a replica of my Dad's car, but this one's in gray with black interior. I made it as much as I could to the real car, thanks to pieces from the Arocs and Porsche set. Features Sariel's 4-speed sequential gearbox controlled by a medium motor All-wheel-drive Independent suspension Rack-and-pinion steering Fake V8 engine Six seats (could not fit a seventh one) with the rear four being foldable Opening side doors, trunk door, and hood. Detailed interior The gearbox and the two differentials in the car like to click while moving (especially on rough terrain) around, but the result was a car that was heavy, slow, but also makes lots of torque. I'm very happy with how this car came out and I couldn't have done it without all of the helpful people on the Lego community and EuroBricks. Thanks especially to my good friend TheMindGarage for never making me give up. Now I can officially call myself a true master builder. Check out this build on my EV3 community account too for more photos and information about it. I would love to make a YouTube video soon about the features of the GX EV3 and footage of me taking this build on some dirt trails in a park. I also want to take a picture of this right next to my Dad's actual car. So please follow this post to check out some stuff I might upload in the future! To finish this post, here's some collages with photos of the GX EV3.
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Hey Guys! I have been building with Mindstorms for just about 4 years now. To think of that is pretty mind-blowing! So I decided to re-create a video on a creation I built almost 3 years ago: My Lego Mindstorms CUB3. Description: "Built with LEGO MINDSTORMS and Technic components, this creation includes: 2 EV3 Large Motors, 1 EV3 Medium Motor, 1 EV3 InfraRed Sensor, 2 small linear-actuators, a pair of hidden caterpillar tracks, and more! With its insignificantly-looking cubic structure, CUB3 is engineered to look like your ordinary box just lying around. Decoration, anyone? Your neighbors will find out soon enough. Just watch!" Hope you guys enjoy! P.S. - Some of you EB users gave suggestions on my video editing of a previous video. I tried to follow that advice when editing this video. What do you think? Thanks! -
Not really, but I found out that the motors in my GX EV3 peform better in IR Control mode than how they do in my program, and I believe that it is because the motor power is different. Each block in the EV3 programming software that moves the motors has a digit for how much power each motor should have. I'm wondering what this digit is in IR Control mode, because the motors act much better in this mode than how the do in the program. If anyone here knows the power of the motors when the EV3 brick is in this mode, please reply as soon as possible. It would be very appreciated. -
I'm back with one last issue in my GX EV3 build. I just got done finishing the doors, side panels, rear trunk door, hood, and some part of the roof. But the vehicle was so heavy that when I drove it around, it kept on doing the same thing. The diffs were clicking and the car had very much difficulty moving. Here is a picture of the bottom of the vehicle. Most of the clicking seems to be coming from the rear diff when I move the wheels by hand. I can either do two things. 1. Reinforce the rear diff somehow. 2. Improve it's off-road performance and stop the clicking somewhat by replacing the diffs with knob gears. But this will come at the cost of independent moving between the wheels. What should I do? Please give me the best response you can so the clicking will stop and I could finally take this AWD machine through some rough terrain like a real SUV. I really appreciate any advice.
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I looked at the R2D2 instructions on my EV3 home edition software but I don't have all the parts necessary. 2 of the parts I don't have are the infrared sensor and remote infrared beacon. Now I figured that if I am to program a robot that will follow me without these 2 components, I would use the ultrasonic sensor, which I do have as a substitute. But then I would probably also need to use the color sensor and I have no idea how my pale skin color would show up when programming the color sensor(probably black because it doesn't recognize it but I don't know). And how could I get it to climb stairs? I guess I could use the 2 large motors as a source of a pulling force that will pull the whole robot upwards but is there a better way?
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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 -
Here's something a little different, I needed a sorting machine using Tensorflow, Raspberry Pi and EV3 (with RPyc), so 45544 fit the bill pretty nicely. The project took a couple of weeks to get up and running mostly due to having no exposure to either EV3, Tensorflow or RPyC, but it is definitely achievable with some shoe-horning here and there. Don't hate my LEGO extension to the 45544 sorter too much, it was quick and nasty, the project isn't about the elegance of that side of things, it is more about making an end result that works doing something the EV3 can't on its own. And work it does, it is able to reliably discern 4 image types stuck onto 3D printed tiles (in place of the technics bricks). In the shorter term I will design and 3D print a support structure to hold the Raspberry Pi + camera. That part will be done using driven design workflow in Autodesk Inventor, feeding in known LEGO brick dimensions for quick & easy parts alignment. In the longer term I can see the addition of a vibratory bowl feeder with tiles being recycled after sorting for continuous operation. Right now it is a technology demonstrator that will be used to introduce school children to some modern technology, I should be able to complete a design manual for them to replicate my working design. Check it out if you're at all interested in controlling the EV3 externally to greatly expand its functionality: https://www.youtube.com/watch?v=wSSh9iV70ng
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Hello, actually i am working on an small robot, who is able to climb about obstacles.This is the current version.
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Yes, this is a giant F1 car. It's around 1.2 metres long and large enough to sit in. The main features: Pedal-driven rear wheels 8-speed sequential transmission shifted via paddles on steering wheel Rear disk brakes activated by button on steering wheel Electronically-controlled limited-slip differential Rack and pinion steering connected to steering wheel Display showing pedal RPM, gear and wheel speed The car uses MINDSTORMS EV3 to operate the functions. It uses one standard EV3 set's worth of electronics plus an additional Large motor. The gearbox is a 4-speed design expanded with a close-ratio 2-speed (ratios 1:1 and 1:1.2) giving 8 speeds in total. A single motor controls it - each gear requires 180 degrees of rotation. Rotating by 90 degrees puts the gearbox in neutral. A Geneva mechanism is used to control the 4-speed - when the 2-speed goes from the high gear to the low gear, the 4-speed is advanced one gear. This is how it shifts from gear 2 to gear 3. In order to reduce the amount of torque handled by the gearbox, it is geared up very highly. This increases friction and reduces efficiency, but there is no shortage of power (I calculated a human’s power output at over 100 EV3 Large motors!). The limiting factor here is how much torque the parts can handle. The disk brakes use a 49mm tyre as the disk and red rubber pads from the EV3 Expansion set. There are two sets of callipers on each wheel (4 pads per wheel in total) giving huge stopping power. A rather complex linkage allows a single input to control both sets of callipers at the same time. An EV3 Large motor pulls on the beam which activates the brakes via a bell-crank linkage. There are two brake motors so the EV3 can operate them independently - this is important for the next step. The differential is very ruggedly-built to prevent gear slippage or parts breaking. An extra small differential measures the speed difference between the two outputs - this goes to a Medium motor used as a rotation sensor. This allows the percentage differential slip to be calculated - if it exceeds a certain limit, the faster wheel is braked slightly (via the disk brakes) to give more torque to the slower one. The clutch ring is manually operated by a switch under the steering wheel- when engaged, it locks the output to zero, making the differential operate as a solid axle. This is a very similar system to the one used on the million-dollar McLaren P1 hypercar. The wheels are made from tank tread links bent backwards into a tight loop. Not sure if this is considered a "legal" solution, but it works very well. The front wheels have 42 links and the rears have 48. The rear wheels have very tight spokes in order to allow them to take the massive weight of the driver. The wheels started gaining camber (tilting) and falling off under load, so I added extra support on the other side of the wheel. The beams are set up to be under tension to push the wheel towards the axle and prevent it from falling off. The rear section uses many layers of beams and frames to make it strong enough to withstand the weight of the driver. Extra diagonal beams (the white ones) are added - they are positioned in a perfect 3:4:5 Pythagorean triple to avoid having them under compression or tension. I used a Warren truss for the central structure - that bit is virtually indestructible. The front section doesn’t look very strong, but the extra vertical beams allow it to withstand plenty of load. The chassis is very sturdy, but with a driver on board, it tends to bend quite a bit and suffers from some serious body roll issues. The steering uses a rack-and-pinion system with just over half a turn from lock-to-lock. This is similar to the steering ratio used on F1 cars. Two large custom-built universal joints are used for the steering shaft. The shaft is reinforced to prevent torsion - even a little twisting would result in inaccurate, floppy steering. The steering wheel is made to look like an F1 wheel. The two rear paddles are for the gears - right for shifting up, left for down. The front left paddle activates neutral gear when held - as soon as it is released, the transmission returns to the last gear selected. The front right paddle activates both brakes simultaneously. Each paddle presses a button on the EV3 infrared remote which is in the middle of the steering wheel. Its signal shines through the turntable and is captured by the IR receiver on the other side. This allows signals from the steering wheel to reach the EV3 brick wirelessly. The paddles have a very short throw and a crisp feel - they’re one of my favourite parts of the car. The car has a full display with features like an RPM bar and wheel speed shown (since the wheels have very little grip and are liable to doing burnouts, actual speed will be quite different). The gear number is also shown. The RPM is measured by a touch sensor and a cam connected to the pedals. The cam bumps the touch sensor every 1/7th turn of the pedals. I initially tried to use a Colour sensor to detect the black chain links against the greys but the difference in reflected light was insufficient for it to be reliable. Strength-wise, the chassis can easily deal with 20kg on the seat. Perhaps it would be ideal for a 6-year-old gearhead. Unfortunately, I'm a lot more than 20kg, so I kind of broke it. Here's the aftermath: Here's a video of me explaining and demonstrating the features of the car. You can also skip to 10:56 to see me try out the car... [All music is composed by me. My F1 V10 impression is not edited in any way!] In the end, I think it was a successful experiment. I intended this MOC to be a testbed for various ideas I had, and you might possibly see a scaled-down version of some of the mechanisms (such as the differential) in a normal-sized car of mine in the future. After all, that's why real-life car manufacturers build concepts and sell low-volume cars at a loss. If it wasn't for that, we wouldn't have the Bugatti Veyron, Pagani Zonda R, Lexus LFA and other amazing machines.
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Hello All Sorry if this question was already raised! As you all know Lego Rechargeable Battery for ev3 is expensive. May I ask you if anyone tried to use 6 Li-Po 1.5v rechargeable batteries there instead of regular lithium Batteries? Ni-MH are all 1.2v , and will not work as needed but maybe 1.5 li-po would be Ok ? Brand, let say : ZNTER They can be found on ebay for $40 for 6 batteries ... http://www.ebay.com/itm/6pcs-ZNTER-1-5V-AAA-400mAh-LiPo-rechargeable-lithium-battery-USB-charging-line-/272099707530?hash=item3f5a680a8a:g:RQ8AAOSwX~dWkQt- or http://www.bestbuy.com/site/eco-cell-usb-cell-rechargeable-aa-batteries-4-pack-white-green/4471800.p?skuId=4471800 Thank you !!!
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Hi, I am trying to model a leg, with a knee and ankle joint, as can be seen in the image with the two motors at the joints. I intend for it to stand up by itself based on the accelerometer reading. However, I don't think the design is very good and would put too much exertion on the motors. I believe a better alternative would be to use worm gears, which I do actually have at the top of the picture to manually change the angle of the accelerometer. So I would like to replace the motor system with a worm gear turned by the motor. However, this is also going to require gears to turn the direction of rotation by 90 degrees. Can anyone suggest the best and most robust way to do this? It would be great if you could let me know what parts would be required for the perpendicular gearage, and the work gearage. I have three Lego EV3 Mindstorms sets.
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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
