Updates

• 
  Zsolt Szrapkó is now friends with robot boy.

  • October 15, 2014
• 
  robot boy testing my improved 3R robot arm (2nd place at the SBrick contest #1). kinematics is not perfect yet...

  4:40

  LEGO Robot Arm 3R

  Early prototype of my 3R robot arm

  • October 14, 2014
• 
  robot boy replied to a topic in the forum Suggestions:

  Also, I was wondering if you could use the other two lines for this. The PF cable has 4 wires, two for electrical power, and two which I don't know exactly what they do. Maybe they can be used for input, perhaps LEGO has plans for i2c also on the PF...  moreAlso, I was wondering if you could use the other two lines for this. The PF cable has 4 wires, two for electrical power, and two which I don't know exactly what they do. Maybe they can be used for input, perhaps LEGO has plans for i2c also on the PF series.
  In this case, maybe a project for a whole servo motor with position feedback would be also nice!  

  • October 14, 2014
• 
  Robert Lee is now friends with robot boy.

  • October 14, 2014
• 
  robot boy replied to a topic in the forum Suggestions:

  The point of having a board with 8 or more motor ports and 8 or more sensor ports is to enable you to create a big project and control it with a single smart brick and a single battery pack.

  • October 12, 2014
• 
  robot boy replied to a topic in the forum Suggestions:

  Those shields suck.
  Fisrt of all they use the L293D motor driver, which is known to explode under the moderate load of LEGO motors.
  Secondly, those shields offer no significant number of ports compared to the original NXT/EV3 brick, and cannot be...  moreThose shields suck.
  Fisrt of all they use the L293D motor driver, which is known to explode under the moderate load of LEGO motors.
  Secondly, those shields offer no significant number of ports compared to the original NXT/EV3 brick, and cannot be stacked, so what's the point of using an arduino or an rpi with those shields?
  If you like to code your projects in C, Java or Python, those languages are already available to the NXT brick.  

  • October 12, 2014
• 
  robot boy posted a topic in the forum Suggestions:

  suggestion for new product

  How about a smart brick for NXT/EV3 sensors and motors?
   
  I am thinking about a replacement for standard NXT/EV3 smart bricks, which are quite limited in terms of number of ports.
  There are several issues in designing such a large board, for example...  moreHow about a smart brick for NXT/EV3 sensors and motors?
   
  I am thinking about a replacement for standard NXT/EV3 smart bricks, which are quite limited in terms of number of ports.
  There are several issues in designing such a large board, for example the number of I2C buses.... which is unusual to have more than 4 on a common MCU. Perhaps this can be solved with I2C switch ICs. Also, for every NXT/EV3 motor port, 4 I/O lines are required, one H-bridge motor driver, probably a PWM driver, and two lines for reading the rotation out of the quadrature encoder.
  It is a challenging project, but this would allow for very large projects to be built with it.  less

  • October 12, 2014
• 
  robot boy is now friends with mescalinum ..

  • October 10, 2014
• 
  robot boy is now friends with Mihai Dreve.

  • October 9, 2014
• 
  robot boy replied to a topic in the forum Suggestions:

  A rotary encoder device (similar to MS GlideWheel http://www.mindsensors.com/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=173) would be really nice.
  That would allow to turn PF motors into servos (but without the limitation of the LEGO...  moreA rotary encoder device (similar to MS GlideWheel http://www.mindsensors.com/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=173) would be really nice.
  That would allow to turn PF motors into servos (but without the limitation of the LEGO PF Servo of 180 degrees range)  

  • October 7, 2014
• 
  robot boy is now friends with abfede sempre.

  • October 7, 2014
• 
  robot boy replied to a topic in the forum Suggestions:

  nice ideas!
   
  +1

  • October 7, 2014
• 
  robot boy Vote me for Technic Control Center resurrection in the SBrick contest! SBrick-based robot arm + control center app

  • October 7, 2014

  • abfede sempre, SBrick Admin, and Mihai Dreve like this.
• 
  robot boy has just signed up. Say hello!

  • September 18, 2014