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Thread: a propeller board pin question and a motor controller question

  1. #1

    Default a propeller board pin question and a motor controller question

    Hello

    how are you all to day.

    I have a propeller bard for a company called inex it has 2 or 3 pins labeled +v then 2 pin next to it that says +5
    now on the not so exact schematic it says v+O and 5+O now i know that second one means + 5volts out what is the +vO stand for ..

    not for the motor controller


    does anyone have a small 2 motor controller that can be hooked to an external power supply but be controlled forward and backward with speed setting . real cheep if you are felling really good a ( donation ) LOL

    Please private message me on the motor please


    Badger
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

  2. #2

    Default

    Hi Badger.

    You can drive motors with variable speed by one half of L298.

    Direction by Inx pins and Speed with variable voltage to +Vs Motor

    Ps. You can drive 2 motors on that IC but both must have same sped at time but not nesessary if it not dirves in same time

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Nothing is impossible, there are only different degrees of difficulty.
    For every stupid question there is at least one intelligent answer.
    Don't guess - ask instead.
    If you don't ask you won't know.
    If your gonna construct something, make itas simple aspossible yet as versatile as posible.


    Sapieha
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

  3. #3

    Default

    Sapieha

    Hey thanks for the info but.. could you please explain that a tad or send me someplace for some good documentation or send me some to my email address. if you would that is please..


    and is that what v+ mean variable voltage

    if so as i asked above how is that done


    Badger
    was going to send the schematic but it wont seem to let me. is this missing key error the cause of that
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

  4. #4

    Default

    Take a look at the ppdb schmatic. There is L293D motor controller on it, bottom of page 4. It needs no other external components. I am using it to control some motors.
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

  5. #5

    Default

    Hi Badger.

    Yes I can suply You with more details

    In this thread haveYou My construction on that IC. It can drive one steper motor else 2 =V+ motors on one halv of IC one motor
    http://forums.parallax.com/forums/default.aspx?f=25&m=296407&g=297228#m297228

    IC has 4 InX pins to control direction 2 Enable Pins to control Enable one halv of IC with it You can control Motor 1 else 2 ON
    With InX Pins control You Direction.
    With V+ Motor driving Pin wiyh variable voltage driving You control speed

    Chj

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Nothing is impossible, there are only different degrees of difficulty.
    For every stupid question there is at least one intelligent answer.
    Don't guess - ask instead.
    If you don't ask you won't know.
    If your gonna construct something, make itas simple aspossible yet as versatile as posible.


    Sapieha
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

  6. #6

    Default

    hey



    Sapieha


    here is a link to the schematic it wont let me upload it tonight for some reason.

    http://forums.parallax.com/forums/default.aspx?f=25&p=1&m=294428#m294456

    here is a link to the pic of the board.

    http://forums.parallax.com/forums/default.aspx?f=25&p=1&m=293571#m293705


    i really cant figure out if you are talking about an ic that is on the board or built into the propeller chip it self. I reall dont know much about the propeller chip i have been working with the BOE and the HWB so i am a very serious noobie at this ok


    Badger
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

  7. #7

    Default

    Hi Badger..

    I talk on IC on My Board. It is L289N DUAL FULL-BRIDGE DRIVER

    http://forums.parallax.com/forums/default.aspx?f=25&m=296407&g=297228#m297228

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Nothing is impossible, there are only different degrees of difficulty.
    For every stupid question there is at least one intelligent answer.
    Don't guess - ask instead.
    If you don't ask you won't know.
    If your gonna construct something, make itas simple aspossible yet as versatile as posible.


    Sapieha
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

  8. #8

    Default

    The o of +Vo is the schmatic symbol for the end of the wire. Its saying +V, it connected to the +V at the top of the schematic which is the input voltage after the main switch. So if you power the board from a voltage that can run the motor as well you can use this output.
    You dont mention what motor you are trying to control. What can be used to control it depends on what the motor needs - voltage and current.
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

  9. #9

    Default

    Sapieha

    thanks for that information. I will tell you the voltage and current in a moment i have to look it up I dont remember what it was ok





    Badger
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

  10. #10

    Default

    Hi Badger..

    On L289N You can drive up to 2x2A 46Vup to standart motors else 1 up to 4A 46Vsteper motor

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Nothing is impossible, there are only different degrees of difficulty.
    For every stupid question there is at least one intelligent answer.
    Don't guess - ask instead.
    If you don't ask you won't know.
    If your gonna construct something, make itas simple aspossible yet as versatile as posible.


    Sapieha
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

  11. #11

    Default

    Sapieha

    looked it up and i had to read the customers review to find out that it can draw a max load of 1.5 amp at 1.5 to 3 volts. I have also read that you can push 9 volts though these things but you have to step done the amps. but i am looking to run some ware between the 1.5 to 3 i really dont think i will need no more than 1 amp per motor.


    does this sound like to much power. I want to drive a small robot. I am going to have to figure out some gearing. I am going to have to make this cause i cant afford to buy anything like that. because it turns a max of 5800 rpm under load give or take 12 percent. the robot will weight in at any ware from 3 to 10 pounds it depends what i can afford to deck it out with.

    Badger
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

  12. #12

    Default

    Sapieha


    her is a question. i have looked this board over with a 4x magnifying glass and can not fine the l289d chip. I am tired and on my pain med i am not comprehending very well are you saying this board can do what i think you are saying. that it can use an external power source up to 2 amp to drive motors using pwm or somthing like that. if so is this built into the prop chip or is it the big chip just behind the power input plug

    Badger

    ps sorry to be so stupid tonight. my brain is rather fuzzy. I take some pretty heavy meds I see a pain clinic so. sometimes i fight to comprehend things a little harder
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

  13. #13

    Default

    Hi Badger..

    To that loads You can use relatively smal transistors.
    It is only 1.5Ax3V=4.5W

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Nothing is impossible, there are only different degrees of difficulty.
    For every stupid question there is at least one intelligent answer.
    Don't guess - ask instead.
    If you don't ask you won't know.
    If your gonna construct something, make itas simple aspossible yet as versatile as posible.


    Sapieha
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

  14. #14

    Default

    Sapieha


    ok here are some questions. My mind works more like step by step or pictorial ..

    the blue connect beside the wall power plug is that ware i hook the external power supply for the moters

    ad you said something about resisters i know about resisters and how to figure watts and such.

    but do i have to build something on a small bread board to make this work..

    Sapieha it may be late and all the other stuff i have said about me but i am drawing a complete blank. if you dont feel like dealing with me tonight that is fine.

    but if you can can you step it out in a step by step detail a little i will try and grasp the concept you are trying to push in between my ears LOL

    Badger
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

  15. #15

    Default

    The only thing to watch for is often the 3v motors can't take high voltage without dieing quickly. Heres someone who ran the fa-130 motor - the motor in a lot of tamiya toys at higher voltages http://www.pololu.com/docs/0J11/all they died badly.
    So you will not be able to use +V but you will need a separate power supply.
    If this is a 1 off project you can do what I did, which is swap the motors for solarbotics RM3 http://www.pololu.com/catalog/product/604 these are the same size but can take higher voltage and lower amps. I run these off a 8V battery, the same battery I am feeding a propeller board.
    A link to the L298 is http://www.st.com/stonline/books/pdf/docs/1773.pdf
    and the L293D is http://focus.ti.com/lit/ds/symlink/l293.pdf
    If you can use the L298D or L293D then you dont need external diodes, if you get the controller without the D you need external diodes.
    The board you have doesn't have the motor controller on it, you will need to add it, either the L293D or L298 will do. Or you can build the equivalent with transistors. I find the L293D the easiest - since no other components.
    Also look at http://www.parallax.com/Portals/0/Do...0Schematic.pdfpage 4 os a schematic for a L293D
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

  16. #16

    Default

    Sapieha


    the power regulators has 4 leads first is kia27b-r339l the second is kia278b-r05p1 are these strong enough to pull the power i need for these 2 motors

    Badger


    if so then all other question are mute
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

  17. #17

    Default

    Hi Badgers...

    PM to me..
    Al parameters on Yours motors.
    I can draw for You one schema with posible control alternatives.
    One with Constant speed and one with Variable speed..
    You can have it tomorrow

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Nothing is impossible, there are only different degrees of difficulty.
    For every stupid question there is at least one intelligent answer.
    Don't guess - ask instead.
    If you don't ask you won't know.
    If your gonna construct something, make itas simple aspossible yet as versatile as posible.


    Sapieha
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

  18. #18

    Default

    Sapieha


    Ok i need to ask why i cant use the v+ on the board is the voltage to high if so can i bring it down with an array of resistors or what .. i guess i am learning a lot tonight lol

    Badger
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

  19. #19

    Default

    Hi Bagers...

    If You have Prop board You must Have 3.3 V+ and 5 V+ on board.
    Til one motor that have 3 V specification You can use 3.3 V+ with direct Transistor drive with no speed control else PWM to control speed Votage.
    Eles 5 V+ with PWM transistor control with no extra Resistor at alls

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Nothing is impossible, there are only different degrees of difficulty.
    For every stupid question there is at least one intelligent answer.
    Don't guess - ask instead.
    If you don't ask you won't know.
    If your gonna construct something, make itas simple aspossible yet as versatile as posible.


    Sapieha
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

  20. #20

    Default

    Sapieha

    i sent an im from here and an email to your hotmail account. let me know if you got it. I have satellite internet and it is raining so i dont know if my sends with through let me know

    Badger
    Last edited by ForumTools; 09-30-2010 at 12:56 AM. Reason: Forum Migration

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