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Technical questions

    • 2 posts
    September 10, 2015 10:05 AM CEST


    • 99 posts
    September 10, 2015 9:54 AM CEST

    You can use both, Matt. There are Pros & Cons:

    - Disposable batteries (1,5V each) deliver 9V but are heavier than LiPo batteries

    - Rechargeable batteries in a standard BB are usually 1,2V types. They are as heavy as disposable batteries but, by definition, can be charged again and again.

    - Rechargeable LiPo battery boxes deliver 7,4V and are lighter. They are rather expensive, so it's a personal choice regarding your budget !

    In terms of power for an RC Car: the current draw of a given motor doesn't really change: for example, the 5292 RC Buggy motor draws around 1,4A, no matter what the voltage is.

    The power is equal to the voltage multiplied by the amperage, so if you choose 7,4V instead of 9,0V, the electric power - hence the mechanic power - is of course lower by 18%. You will save something like 30g, but that's nothing in the global weight of a Lego Technic RC Car. And the power/weight ratio is critical for a car...

    How this will help :)


    This post was edited by Marc Jaouen at September 10, 2015 9:58 AM CEST
    • 2 posts
    September 9, 2015 3:04 PM CEST

    Hi everybody, I've just purchased a Sbrick! ;) 
    I'm happy to support you in these wonderful project.

    A question: I am working on a buggy and I want to know which battery pack is better to use with Sbrick. There is no difference? 9V or 7,5V?




    • 2 posts
    August 10, 2015 5:07 PM CEST
    I have solved the problem by myself.
    I have used the password from this forum and this is different to the one sbrick send me after my registration for bying some hardware.
    I thought the "social login" would base on this social forum...
    But now it is working and I cannot wait to receive my two sbricks!
    • 164 posts
    August 10, 2015 11:37 AM CEST

    Hi Gordon, 

    Please contact us at: and tell us your registered e-mail address. We will check your problem asap. 

    • 2 posts
    August 9, 2015 7:08 AM CEST


    I am new here and I hope this is the correct topic...

    I hve bought 2 sbrick (which has not yet arrived) and I wanted to "test" the iOS App in advance with my iPhone 6.

    The problem is I cannot login to the social network? I have tried to use the same login l am using for this site and I think this is correct.

    Any advises for me?

    • 3 posts
    August 3, 2015 6:48 PM CEST
    Ok. I found it. Thanks
    • 164 posts
    August 3, 2015 6:23 PM CEST

    It is work for me, but nevermind.

    You need this cable:
    "Converter Cables for LEGO® MINDSTORMS® NXT"
    Lego Item number: 8528

    • 3 posts
    August 3, 2015 6:17 PM CEST
    Tamas misik first link that you send aren't working. :(
    • 164 posts
    • 3 posts
    August 3, 2015 1:55 PM CEST
    Hi. Can i connect lego mindstorms motor to sbrick?
  • June 6, 2015 9:50 PM CEST

    [blockquote]Marc Jaouen said:

    Jean-Christian, the Social Login is the Id+Password you use on this site. The same Id is used for the website, the profile designer and the app on your device.


    [/blockquote]thank you

    • 99 posts
    June 2, 2015 6:31 AM CEST

    Jean-Christian, the Social Login is the Id+Password you use on this site. The same Id is used for the website, the profile designer and the app on your device.


  • June 2, 2015 2:06 AM CEST


    now i have the good tablet ,but i need knowledges about the "social login"


    • 1 posts
    April 29, 2015 6:02 PM CEST

    Why I can't install the App on my tablet? (Samsung Tab 3 Android 4.4.2)

    • 207 posts
    April 21, 2015 12:27 PM CEST

    [blockquote]Andrzej Szerszeń said: Hi, I use in my Lego projects Battery box with LiPo 11.1v battery without bracket For Classic AA - it is lighter, more powerful and rechargable , can I use this voltage with Sbrick?[/blockquote]

    Yes, you can use it! :)

  • April 21, 2015 1:23 AM CEST
    Hi, I use in my Lego projects Battery box with LiPo 11.1v battery without bracket For Classic AA - it is lighter, more powerful and rechargable , can I use this voltage with Sbrick?
    • 95 posts
    April 8, 2015 12:31 PM CEST

    [blockquote]jean-christian rey said:


    what is the best tablette to use sbrick ?


    As Android and Windows are still beta I think the answer is for the moment iPad 2 min



    This post was edited by Frederic Ayrault at April 8, 2015 12:31 PM CEST
  • April 7, 2015 9:32 PM CEST


    what is the best tablette to use sbrick ?

    • 23 posts
    February 10, 2015 9:28 AM CET

    When I visit on my Sony Z3 Android-phone, I cannot scoll down. Works fine in Safari on iPod though

    • 5 posts
    February 1, 2015 1:04 AM CET
    Matlab has come a long way in the last 20 years. It is a full blown development system these days. I have used it professionally, but it was becoming price prohibitive. Student versions were available, but I am no longer a student.

    I may look into the raspberry pi route. I bought one when the first came out, powered it up and played with it a bit but got frustrated when I could not get a schematic or even a data sheet on the CPU.

    OT and speaking of schematics, is the schematic available for the sbrick? Would I get in trouble for publishing one?
    • 87 posts
    January 31, 2015 10:31 PM CET

    Last time I used Matlab was some 20 years ago at college so can't help you.

    Raspberry Pi Foundation has made an agreement with Wolfram Mathematica so it is available (I think) free for use with the Pi and there are people using it with the PiCam or common USB webcams. And Raspberry Pi can talk with the SBrick, I had already done it. But is linux-based and I understand that is difficult to start with.

    Good luck for your project, keep us informed of your progress.

    • 5 posts
    January 31, 2015 4:46 PM CET
    I have used Octave, it is available for both Window and Linux. Octave is a fine product for what t does, but it not seem to support things like building GUIs, image capture and processing, and communications with external instruments. It may be possible to implement a lot of this if you are very familiar with Linux, but I am not. The home version of Matlab with a the tool boxes I want will run about US$400. I think that is reasonable.

    The EV3 would be fine but somewhat bulky and expensive solution for controlling a switch yard, but going the EV3->IR ->PF route to control trains has serious limitations.

    Reed switches and other sensors along the layout would certainly work, but I would really like to have a wireless solution. A cheap webcam seems like a nice solution.
    • 87 posts
    January 31, 2015 4:13 PM CET

    If you are considering Linux you may also consider some open source alternatives to Matlab like GNU Octave and a few others:

    GNU Octave claims "The Octave language is quite similar to Matlab so that most programs are easily portable." But I don't know if it can answer your image capture and processing needs.

    If your goal is specifically multi train controlling there are other less computer demanding options (i'm beggining a simple Mindstorms EV3 setup with RFID sensors before switching tracks and RFID tags in the trains but others are using reed switches or hall effect sensors in hot spots of the track path and magnets in the trains, color sensors, etc)

    • 5 posts
    January 31, 2015 3:50 PM CET
    Thank you for the information. Yes, I am still using Window, but 8.0 has further tempted me to move to Linux.

    The image capture / image processing capabilities of Matlab coupled with the sbrick would be idle for controlling multiple trains on the same track and doing other complex tasks. Matlab has recently released a 'home' license in the US that is affordable. I really want to get Matlab working with sbrick. I suppose I could also wait for Matlab to support BLE if they do not already.

    Yet another possibility would be to build my own external BLE dongle.