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Showing results for tags 'java'.
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Hello everyone: I am glad to share this project, the mining excavator, based on Cat 6090. Phisycal Configuration: The Lego Cat6090 is a motorized digger on tracked wheels, 2 XL motors provided enough torque. On the track frame is placed the main structure, and a heavy duty turntable allows good rotations, without fricctions. The turntable is rotated by means of 1 XL motor. The main structure contains: the XL motor for turntable, the air compressor, 4 servos for pneumatic valves and the controller. The design is ultra compact in order to meet the requierement of size/scale. The tracked whell is ultra rigid structure, designed to resist extreme load. The air compressor has 4 XL motor and 2 pneumatic pumps, in order to provide a constant air flow and high pressure, both pumps are de-phased 180° in order to reduce vibrations. 4 PF-servos open/close 2 way air valves, to command all pneumatic actuators. The boom has 2 large pneumatic actuator. Due to heavy height of the boom, 4 spring supply extra force during the elevation. 2 large pneumatics actuators push/pull the arm, those actuators are placed below the arm. 2 large penumatics actuators dedicate to rotate the bucket. 1 medium pneumatic actuator, open/close the bucket. Electrical configuration: Three 18650 batteries provide an average of 11.1 V, the compressor are suplied with 11.1 V, and the servos, lights and turntable motor are suplied with 9V. A BMS (Battery Managment System) manages the charge and the discharge durgin the operation. The tracked frame is steering by the use of 11.1 V, and as well is manage by the use of a BMS. On Board System (OBS): The name given to the controller. There are two systems, one for the main structure, and the secund is used to move the tracked well. The main controller, is a server TCP/IP protocol. The controller has a ESP8266 microcontroller with a TCP/IP stack, this controller is able to be programmed in arduino languaje (also micropython) - Teh ESP8266 is used as a sever, Motor driver: used to control the compressor The 4 PF servos are controlled by means of digital outputs, and the lights. ld293d, this is a H-bridge used to control the turntable motor. The second controller, is a ESP8266 as a client, and controls the speed of the tracks. Also, it has a BMS in order to regulates the charges/discharge of the batteries Accessories: 1) Josyticks: Two joysticks, with 4 dof (degrees of freedom) each of one plus a on/off button, are connected to the server module. 2) App: An application developmented under Android studio is used to visualizate the air pressure and electrical current, this app is WIP (work in progress). Conectivity: The comunication used is socket TCP/IP- Main features: maximun pressure reached: 52 psi (358 Kpa) Voltage bus: 11.1 V Compressor electrical consuption: 23 W Weight: 6 kg Length: 30 cm width: 20 cm height: 30 cm Here some pictures, during the construction and commissioning Note: my apologies for my primitive english -
Hi ! Some students and me create a new exercise for other students. This time we constructed a robot using mecanum wheels. Students should learn how to control this robot using mathematical equations and implement them in Java leJOS. Have fun! Andreas -
Papercube is a fully automated Lego "factory" created by students and me Germany's Jade Hochschule. It is a scale model of an actual production line. The machine takes a piece of paper and runs it through a series of processes that manipulate it into a paper cube. The paper is then perforated by a laser to outline the shape the cube will eventually take. The laser is enclosed in a protective, orange casing to protect the eyes of anyone watching this process. Enjoy our video :-) Andreas
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Play TicTacToe against this LEGO Mindstorms EV3 robot. It uses three motors to drop its balls into the right field and a NXTCam to view the board. It then calculates the best move using a MiniMax Algorithm. All future moves are explored and rated according to their winning chances. An IR sensor detects your hand when you drop your ball. The robot is using red balls and the human player uses blue balls. The java code is available at Github and the building instructions are available for LEGO Digital Designer on my website show in the description. I used the MinuteBot baseplate, which is useful for building static Mindstorms models. I also used a LED lamp to provide consistent lighting that is powered through the USB port of the EV3. The position of the camera can be centered on the board using the wrench and through sliding along the axles. I hope you enjoy this robot. More information at http://www.bartneck.de/2017/07/17/tictactoe-playing-lego-mindstorms-robot-using-computer-vision/ -
The other day I built a coffee stand I named "Cup o' Java". I didn't think it would get so much attention, and to my surprise it was picked up by The Brothers Brick and on Reddit today. It's a fairly straight forward build, and if anyone is interested in building one, you can download the LDD download link below: LDD file: https://drive.google...aXJvZzQxLWFsRHM Rebrickable page: https://rebrickable.com/mocs/MOC-7416/Miro/coffee-mug-stand/ The LDD is of the mug shaped stand only with coffee machine and steam on top. Feel free to swap out colors as you see fit. I used what I had on hand. Miro Cup o' Java by Miro Dudas, on Flickr
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I've been testing leJos with my old NXT brick and something seems to be wrong.When I flash the brick with latest leJos firmware, it works fine. After some time, it starts spewing some garbage onscreen: The only thing I can do is press Off button, but then it doesn't boot up again and I need to try multiple leJos/official firmware reflashes to get it to work. Has anyone encountered anything like that? Any help would be greatly appreciated.
