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Autonomous Quad Rotacaster Omni-Bot
posted September 8 2010 16:30.14

About a month ago we presented R J McNamara's attempt to build an Omni-wheeled Bot, what that robot was lacking was the Rotacaster Omni-wheels cause the Rotacaster wheels did not existed in Lego Technics format.
Now this is changed and a new robot R J made, is equiped with 4 sets of the new wheels allowing it to move and manuever in any direction smoothly that you forget the 4x Ultrasonic Sensors to aid in navigation.
For more info here is the place to look.

[Link: rjmcnamara]
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Tags: electronic project   robot   diy   rc servo   microcontroller   lego   quadrotor   

Lego Mindstorms NXT Quadra-ped X-4 "Sloth"
posted September 2 2010 8:19.55

222Doc after building the first Lego biped to climb steps now decided to try something harder.
He builded a Quadra-ped from Lego parts that it is able to climb ladders both in vertical and horizontal orientation.
With a total of 12 motors, 8 for articulations and 4 for gripers its sure alot of work to syncronize and program everything and as the maker says its the hardest thing he's done so far.
The result worth the pain though since "Sloth" seems to climb with ease the test ladder and carry its weight around.
Another first for 222Doc since we're unaware of something similar.

[Link: 222Doc]
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Tags: robot   rc servo   lego   mechanical   

posted August 31 2010 18:24.51

Alexandre Dubus after building a fantastic tricopter, decided to keep the original chassis and add some Nintendo Wii console gyroscopes. Combined with an Arduino ProMini and a 6DOF IMU made from Nintendo Wii MotionPlus and Nunchuk.
The result is a perfect, stable flight as you can see in the video from the onboard camera that has almost no vibrations even if it is just cable staped without any vibration dampeners.
The whole documentation complete with schematics and more pics can be found here for the tricopter and here for the TriWiiCopter.

[Link: radio-commande]
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Tags: electronic project   diy   rc servo   Wii   remote control (RC)   microcontroller   arduino   accelerometer   mechanical   

Ball on Plate
posted August 5 2010 21:42.00

blogger45 using an Arduino,a couple of servos and a webcam made a balancing plate for a ping pong ball.
With basic control loop with discrete PID and no anti-windup he managed to have 15% overshoot and a 2% steady state error, the settling time is 2 secs on a framerate of 30fpr from camera.
You can watch more videos here.

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Tags: electronic project   diy   rc servo   microcontroller   arduino   accelerometer   

Lego NXT Mindstorms: X 2 Climbing up and down stairs
posted July 29 2010 19:44.28

About a month ago we presented 222Doc's work on making the first Lego biped to climb steps, now the maker moves a step forward the whole project and the X2 is able to climb up and down also.
The movement speed is up to 5x faster than the first X2 and the climbing down is smooth and steady. The best part is that 222Doc is working in arms and body for the X2 that will make it capable to climb ladders and be able to grab things, so stay tuned.

[Link: 222Doc]
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Tags: robot   rc servo   lego   mechanical   

Coffee Machine module
posted July 20 2010 20:14.31 by Giorgos Lazaridis

This is the next module for the Instant Greek style coffee robot (AKA Frappé) that i am making right now. This module is responsible for measuring and putting the proper amount of sugar and coffee. I use a worm shaft to push the material, and a stepper motor to control the rota...

[Link: pcbheaven]
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Tags: electronic project   diy   rc servo   pic   microcontroller   mechanical   crazy hack   

hexapod-tripod plotter
posted July 20 2010 19:36.14

hg5bsd build a rather interesting mix of a hexapod structure but with tripod kinematic with 3 x 2 stepper motors. The mechanics are kept simple consisting of M6 threaded shaft, RC modell universal joints and magnet ball joints, the software controlling the 6 motors is the EMC2 giving the bot a respected accuracy of ~0.1mm.
A very nice concept expressed in a very nice robot, what more to ask?

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Tags: robot   rc servo   mechanical   diy   

posted July 15 2010 20:26.20

Andreas made a fantastic WALL-E transformable self controlled robot from Lego bricks which uses Mindstorms programming environment. As you can see in the video (apart the love story) the robot is transforming as the original one and can also move in both modes. The tracks transformation is trully amazing and even though the mechanism is not seen it must be really tough to put all that staff inside but this bot does the trick!
As far as i know and as the maker states this must be the first of its kind so enjoy it, for more pictures you can also check here.

[Link: nxtwallet]
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Tags: crazy hack   robot   diy   rc servo   microcontroller   lego   

Home Motion Flight Simulator
posted July 14 2010 20:07.47

Thanos Kodoyiannis made this motion simulator based on the old manual operated motion cockpit, the Joyrider for which plans can be found here.
The result (as you can see in the video below) is a very precise motion simulator that can be used with flight or driving simulators as well.
Except the cockpit plans you can find detailed instructions of the build stages and the various parts need...

[Link: techmasterjoe/Thanos]
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Tags: electronic project   diy   rc servo   computer peripheral hacks   gaming   microcontroller   mechanical   simulation   

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