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Found 10 results

  1. Hi all, I have a LEGO office building with an elevator. I've automated the elevator with a mindstorms touch sensor. The program starts by descending down the elevator shaft until it sits on top of the touch sensor at the bottom of the elevator shaft. Ideally, the touch sensor is supposed to trigger the mindstorms motor to turn in the opposite direction and pull the elevator back up for fifteen seconds. The mindstorms motor turns again in the opposite direction, so the elevator descends down again to hit the touch sensor. (The process repeats indefinitely) In a vacuum, this program works fine. However, I've had numerous issues with the sensor not triggering, and the elevator eventually winds in the wrong direction and binds with the roof, breaking. I've tried making the elevator heavier, but it still has issues. I want to program a fail safe so that it will bypass the first wait block or cut off the program if the touch sensor doesn't trigger within a certain timeframe. I've included a picture of my current program. Within the infinite loop, I want the loop to start by waiting for the touch sensor to be pressed, then executing the two other motor commands I have following it. While the program is waiting for the touch sensor to be pressed, I want another thread to wait for twenty seconds. If the touch sensor is not pressed within that timeframe, I want the program to bypass the first touch sensor wait block and continue with the last two motor rotations (then repeat). I've been able to branch off into two different coding threads within one program, but I can't recombine the two inputs into the beginning of one block. How do I do this or accomplish my goal in another way? I'm at a convention right now and I really just want this to work. Some more information, the mindstorms motor is connected to a control switch, which tells my power functions motor which way to turn. That's why the mindstorms motor rotations are so short. Thank you everyone for your help.
  2. (I thought I had made a topic for this model by itself, but i can't find it. All I could find was it in a compilation thread from 2014.) I have recreated this grain elevator designed by my father way back in 1999. The building was built for the loading of hoppers like set 4536 (1991's Blue Hopper Car) or 10017 (2001's Hopper Wagon). This building has never been really well done officially, but it was touched upon in 3677 (2011's Red Cargo Train). However, grain hopper cars have been made at least four times in official sets, with the fourth model being in set 60098. (Heavy-Haul cargo train) I enlarged the opening for the filling of the grain cars by two studs width-wise so that larger engines and cars can fit through, such a steam engines with working side-rods. The building features a handle on the other side or operating the conveyor belt. The handle turns the conveyor belt to drop 1 x 1 round bricks into the funnel and the hopper car below. Though if it gets turned the wrong way, they drop into the bowels of the building to pop out of the bottom of the building where the base-plate would go, onto the table top itself. Here we see the hole I left in case "grain" went the wrong way on the conveyor belt, so it can fall out the bottom and not get stuck inside the model. This is an updated red version of set 4536 (Blue Hopper Car) from 1991. This green version uses a click hinge and platform to dump 1 x 1 round bricks out of the bottom of the hopper. The diesel locomotive model was inspired by Valgarise and his model called "Invencible".(see it here ) It looked like an nice big ALCO model so I copied it and built a matching booster unit in green as seen above. (although originally it was in black with a red base stripe when I first built it) The front unit where the engineer sits is called a Cab (or A) unit, while the trailing unit is called a Booster (or B) unit, though they can be used in more groups than just two, like as an A-B-B-A set as used on the Santa Fe Super Chief. For my purposes, I only use a A-B setup at most. Here is the original grain elevator that inspired my model. It was built around 1999-ish by my father. Comments, Questions, & complaints are always welcome, and the elevator model (plus a half-dozen green hopper cars) should be built by Christmas / beginning of 2019. As you can see, the engine units have already been built. Any thoughts?
  3. Missing Brick

    Neo Classic Space Landing Pad

    I decided to rebuild and mod my LL918 for the 40th anniversary. Then I thought 'this thing needs a landing pad' so I threw this together. Tropical Landing Pad by Missing Brick, on Flickr
  4. Hey! Check out my Lego Boeing 737-600! Working: aileron, rudder, elevator, control column RC: flaps, slats, spoilers, landing gear, thrust reverser Length: 110 cm Wingspan: 125 cm Height: 40 cm Weight: 2,8 kg Video here:
  5. Hi all, Some of you may have seen it already on my Work In Progress channel; the past 5 months I've been busy building a huge train station! It started with an LDD design. I ordered the needed bricks on Bricklink and started building. The LDD design covered the basics: a lot of detailing has been done during the building. The station has working escalators, elevators and sliding doors and are controlled by an Arduino. It also has more than 100 built-in LEDs. The platforms are about 2,5 meters long. There's also a monorail and bus station. I can explain everything that's inside but I suggest you just watch the video ;) If you have any questions, please do ask! :)
  6. polarstein

    [MOC] Monorail station & sushi grill

    Hi all Here's another new MOC. Moving away from residential buildings but keeping the style with black, white and grey boxes with a lot of glass to provide a contemporary/modern design, my latest building is a monorail station with a sushi and fish restaurant. The big "M" of the city's fast monorail network isn't just attracting many commuters every day but also sushi and fish lovers all over town. Monorail station & sushi grill by Polar Stein, on Flickr During first week of opening, a student in a shark costume was hired to attract commuters and passengers walking by. The entire building is on pillars. At street level (ground floor) there is a disabled parking space and parking space for bikes. The small sushi and fish restaurant extends over first and second level, accessible via stairs and the elevator. At first level there are also restrooms. The second level connects to the monorail station (right end of the building) and is accessible both via stairs and the elevator. A small roof terrace on top of the restaurant provides views over the city. Monorail station & sushi grill by Polar Stein, on Flickr The monorail station entrance has a vending machine providing cool drinks, which is especially handy if you're sweating away in a suit. Monorail station & sushi grill by Polar Stein, on Flickr "The train now approaching platform 1 is the 14:47 Brickston Monorail service to East End calling at Scorpion House and Dark Age Road. Please mind the gap between train and platform ..." Monorail station & sushi grill by Polar Stein, on Flickr The red bricks in the actual platform is a less-than-ideal solution in absence of grey bricks. The monorail train is supposed to be red though . More pictures including interiors and the connection to a simple monorail platform can be found on my flickr page https://flic.kr/s/aHskzjsG2r. Comments and critique, things to improve etc. more than welcome! Cheers, Polarstein
  7. Hey all I have a quick question about the mindstorm sensors. I would like to incorporate the colour sensors into my elevator to use as a reference so the lift knows where to stop.. I will put one sensor in the lift and a light or colour at each floor, I would like to know if I can use the mindstorm sensors directly with the power function motors or if id have to build something separate to turn the PF motors on off etc. I would also like to use this sensor in a similar way to open the powered door operator on the lift for 10 seconds or so, Its taken me a long time to get these power function motors to fit and work properly so I dont want to swap them out for the mindstorm motors. Any advice/help would be really appreciated, I'm considering buying the ev3 set but dont want to unless im certain it can help. a video if you want know what im talking about thanks all trav
  8. legolifty

    Working Elevator

    Hi all, Its not exactly a city but its a building you put into a city.. I've been working on it for a fair while now, mostly its just the elevator shaft with some of the buildings first floor complete, I hope to get this around 10 stories tall fully furnished with offices and conference rooms etc. It works really well the doors are electric and are a copy of how a real elevator works.. as close as i could get it anyway. Its roped like a real elevator and has a counterweight (which still needs more weight in it, I am waiting on 5 more boat weights to even it out). I'm planning on putting a mindstorm colour sensor into the elevator to get it to stop at the right spot at every level.. I've never used the mindstorm gear so I'd love to know if anyone has any ideas on this and I'm also trying to work out a way to incorporate call buttons without putting a push sensor at every level.. Ideas would be appreciated! I dont want to go out and buy an entire mindstorm set unless I know its going to help.. Anyway thats my "city" lol, thanks for your time:) Here's a vid of the elevator being built, enjoy! Trav.
  9. Sheepo

    Car Lift

    After some months since I presented a new MOC I want to share here too a little MOC I have dome some days ago. It is a car lift with 2-columns like the mechanics use in in the garages. Actually it is very simple. The lift mechanism is a worm and rack. It is very compact, strong and reliable. It includes arms with adjustable angle, and rubber in the end to prevent the car will slide out of the lift and crash to the floor. It also has auto-stop function,, in the top and in the bottom. The maximum lift weight is around 3.5Kg. Here some tests with differents cars and weights(Yes, I keep my cars assembled...). Under de Defender, you feel like a real mechanic ;) As always a little video!! Also this time free instructions for download for 3 differents car scales (1/8, 1/10 and 1/12) here: Download Enjoy!!
  10. Sometimes you find a theme that you like, so you stick with it. Here is my next MOC, the OCTAN Air Racer. Much more at thirdwigg.com, and instructions are at Brickshelf.com once moderated. The MOC features: Working 8 cylinder Radial Engine Working joystick Dual left and right ailerons Working elevator Retractable landing gear Opening cockpit With the gear down. The radial is more like two boxers perpendicularly connected. A little video. Enjoy and happy building.