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Thread: want help on building ultrasonic obstacle avoiding robot

  1. Smile want help on building ultrasonic obstacle avoiding robot

    Hi !,
    I'm going to build simple ultrasonic obstacle avoiding robot .I know that it can be easily done if I bought motor control board,but I'm looking for a project that I can build motor control board too,then the only component that I want to buy is Ultrasonic sensor,other parts would make my self by assembling parts.I think you can understand what I'm looking for.I'm looking for a diagram that can detect sensor's signals and control the speed of the motors.
    thank you!

  2. #2

    Re: want help on building ultrasonic obstacle avoiding robot

    A Google search for "obstacle avoiding robot circuit diagram" resulted in:

    http://www.roboticsbible.com/project...ing-robot.html
    http://letsmakerobots.com/node/17316?page=5

    However, could you be slightly more specific? Are you looking for a beam type robot i.e. only circuit no controller?

    Since you want to assembly yourself, maybe a kit that requires soldering is something for you?

    http://www.pololu.com/catalog/category/3
    http://www.trossenrobotics.com/rovers-wheeled.aspx

  3. Red face Re: want help on building ultrasonic obstacle avoiding robot

    yes I can soldering and programming (just copy code to PIC via PIC programmer ) and I have those resources

  4. Re: want help on building ultrasonic obstacle avoiding robot

    hello dear,
    your information on first 2 links are very helpful but I'm looking for ultrasonic sensor circuit diagrams not the IR sensor diagrams.I'm very greatful if you can give me a circuit diagram for ultrasonic sensor robot

  5. #5

    Re: want help on building ultrasonic obstacle avoiding robot

    Looking at the robot project from the first link, it has 2 IR sensors that run from 0 to 5 V, you can replace these with a 0 - 5 V ultrasonic sensor that provides analog output. Like this one:

    http://www.maxbotix.com/Ultrasonic_Sensors/MB1010.htm

    And the info on what it provides for analog output:

    http://www.maxbotix.com/articles/016.htm

    Any particular reason you want ultra sonic?

    Owh uhm... I just read a bit further it doesn't seem to be that easy. As I am not that much of an expert with electronics, maybe someone else in the forum can help. Or maybe it is, now I am completely unsure. Can any one comment?
    Last edited by CasperH; 08-22-2013 at 02:26 PM.

  6. #6

    Re: want help on building ultrasonic obstacle avoiding robot

    Break the problem up and work on each smaller problem.

    You need a motor controller. Presumably for a brushed DC motor? If so, time to research motor control circuits, H-bridges, and various ICs that can do this. There are several popular ICs that can help, as well as using discrete MOSFETs.

    You might be ahead of the game if you buy Intermediate Robot Building by David Cook which goes into all of this, as well as other helpful topics.

    You can base the circuit on known working open source controllers. I have a motor controller I did with MOSFETs for my AFRON robot project, for example. I'm sure there's a lot of IC-based controllers out there.

    You can build it on a proto board, bread board, or etch your own PCB or design and order it from OSHPark.

    The microcontroller can be built. You can build your own Arduino clone. I have a breadboard version of this on my blog, for example. Or you could use another MCU that comes in a through hole version so it's easy to breadboard or stick into a proto board. Or you could use SMD if you are good at pcb etching or order a board from OSHPark. You can base your design on simpler boards. E.g., for Propeller, base it on the Schmartboard, for Arduino base it on a Pro Mini or Sparkfun Arduino Pro. Make sure there's a way to interface to the motor control and sonar boards. Possibly even incorporate the motor controller onto the MCU board. Might as well leave a way to expand to other sensors, actuators and capabilities.

    Does this help?

  7. Smile Want help on making Ultrasonic obstacle avoiding Arduino robot

    I have Arduino Uno - Atmel Atmega 328-PU board and Arduino Compatible H-Bridge Motor Driver.I want to make Ultrasonic obstacle avoiding robot with 2wd wheels.I'm looking for suitable program for it.I'm grateful if one of you can provide me a code and say how to install it to arduino board

  8. #8

    Re: Want help on making Ultrasonic obstacle avoiding Arduino robot

    Why not post in your original thread?

    http://forums.trossenrobotics.com/showthread.php?6385-want-help-on-building-ultrasonic-obstacle-avoiding-robot

    I can tell you that your can find plenty of example code in this book (I have it, just checked).

    http://www.amazon.com/Arduino-Roboti.../dp/1430231831
    Last edited by CasperH; 08-25-2013 at 06:03 AM.

  9. Re: Want help on making Ultrasonic obstacle avoiding Arduino robot

    Quote Originally Posted by CasperH View Post
    Why not post in your original thread?

    http://forums.trossenrobotics.com/showthread.php?6385-want-help-on-building-ultrasonic-obstacle-avoiding-robot

    I can tell you that your can find plenty of example code in this book (I have it, just checked).

    http://www.amazon.com/Arduino-Roboti.../dp/1430231831
    drear CasperH,
    on my previous thread I hope to do it with my own board with IC basis.now I bought 2 boards that I mention above now I'm looking for the code that I want.I think buying book is worth less to me because I'm making only this robot so I'm looking for only it's code.not a full book of various project.I'm very thankful to you for paying your attention and helping on my both threads

  10. Re: want help on building ultrasonic obstacle avoiding robot

    after considering your ideas I bought Arduino Uno - Atmel Atmega 328-PU board and Arduino Compatible H-Bridge Motor Driver.I want to make Ultrasonic obstacle avoiding robot with 2wd wheels.I'm looking for suitable program for it.I'm grateful if one of you can provide me a code and say how to install it to arduino board

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