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Found 12 results

  1. 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.
  2. Hi all, I've been working on a Lego 51515 robot that uses computer vision to detect an object and then pick it up. Here is a video: The robot works as follows: 1) Objects are detected by a free TensorFlow Android App, available on Google Play (ArdObjectTracker) 2) The detection data is sent from the mobile via Bluetooth Classic and picked up on the Arduino board by an HC-05 module 3) The object detection data is then processed and converted to robot movement instructions which are then sent to the Lego hub via the BluetoothLE module (HM-10) 4) Finally, the Lego hub (running a Python program) receives the instructions via a BluetoothLE notification and then moves to pick up the object I have shared the code and more details on this Github page: Hope you all find this helpful! Regards, Paul.
  3. 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:
  4. I have been playing with the Mindstorms Robot Inventor kit (#51515) for some time. Unfortunately, it does not have a display, but it has 25 LEDs. The battery level can only be viewed on a connected device: laptop or smartphone. I wrote a short Python program that lights up 3,5,10,15,20,25 LEDs depending on the battery level. It can be uploaded let's say as the 19th program and it will stay in the hub. Maybe it will be useful to someone. Any comments and suggestions are welcome. Battery level on Mindstorms Robot Inventor
  5. A free model based on Lego Mindstorms #51515 (Robot Inventor) and on the MOC EV3 Chebyshev’s plantigrade machine by Artem 16 Free instructions at
  6. Easy to build insect that walks until it encounters an obstacle. At that point it walks backwards, turns around and keeps walking. As can be seen in the video, the way it moves forward and backward is quite curious. The mechanism of the legs is based on the MOC by Isowaga Free instructions and IO file at Rebrickable
  7. Easy to build two wheeled vehicle based on 51515. It can be build using only the parts included in 51515 I lowered the center of gravity everything possible to prevent rollovers but still, to making sudden movements can hit the ground with the front or rear. To avoid this, I have put some small projections that avoid this problem Free instructions at rebrickable.
  8. A modification of "Strandbeest based Walking Frame" designed by JKBrickworks, and Lego robot inventor (51515) This walker allows to adapt a cell phone to its upper part in order to record the video of what would be seen from the walker itself in motion. It is operated remotely using two sliders. This video shows parts recorded with the cell phone mounted on the walker itself and parts in slow motion, so you can see the movement details I hope you like it. Free instructions at Pictures at Bricksafe
  9. i want to know whitch is better a mobile or a other remote control whitc are there ? pro and cons ?
  10. Tilt-wheeled vehicle. A free alternate model of the Lego Technic #51515. You can build it using only the pieces of the 51515 Robot inventor You can find the instructions at
  11. I just upgraded to the Mindstorms iOS app v10.1.0 that came out yesterday. First, a major thing was fixed. The PoweredUp linear motors (L and XL) now work properly and I can read relative and absolute position. This unblocks me quite a bit. Now I am seeing some strange behavior. To replicate this behavior, I have a very simple program: Motors 'F' and 'B' are hard coupled together in opposite directions to power the tilt axis on my robot: The code under test is the 'Elevate_move' function. The goal of the function is to move the motor a relative amount as fast as possible. Passing in '1000' will move one motor 1000 degrees in one direction and the other 1000 degrees in the other. Passing in '-1000' will move them in the opposite directions. As a test, I call Elevate_move(-1000), Elevate_move(1000) right at the start of the program. I expect it to move both directions when the program starts. The actual result is that it moves quickly in one direction and very slowly in the other. Neither direction is as fast as moving the slider which calls the 'Elevate()' function. Here's a video of the test (11 seconds long, embedding videos doesn't seem to work from Flickr): Has anyone else seen this? Anyone know any work-arounds?
  12. This is my first creation with the Robot Inventor set, 51515-1 , created in using LDraw parts as custom parts. I hope you like it and it inspires you to build. The PDF building instructions and part list are available at Rebrickable for free. I haven't build it myself because I do not own the set, but greg10 did and posted a photo. In LEGO Studio the motor cables are not available so; I recommend to use the 49283 Wire Clip with Axle Hole (also available in the set) to manage them so that they will not end up in the wheels.