i need help in dc motor

Discussion in 'General Electronics Chat' started by ahmedahmedahmed, Nov 12, 2007.

  1. ahmedahmedahmed

    Thread Starter Member

    Nov 12, 2007
    29
    0
    hi all
    h r u there
    i need help in dc motor
    i need to control it speed at two direction but using wireless circuit
    i need all it circuit


    so help me pleaseeeeeeeeeeeeeeeee

    thanks
     
  2. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    Please provide additional details. What voltage motor? What power? What wireless scheme?

    Also, please try to use appropriate spelling and grammar. Please refrain from "keyboard speak."
     
  3. ahmedahmedahmed

    Thread Starter Member

    Nov 12, 2007
    29
    0
    i need it 6v dc motor.
    also i need to control it using infrared.
    thanks
     
  4. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    To control both speed and direction, an H-bridge is the way to go. PWM for the bridge can be generated by a microprocessor. Said microprocessor can also decode pulses from your IR receiver.

    What is your level of expertise with electronics?
     
  5. ahmedahmedahmed

    Thread Starter Member

    Nov 12, 2007
    29
    0
    not too much.
    so i need ur help too much please
    and thanks alot.
     
  6. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    Let's break this into three individual topics:

    1) H-bridge

    2) "PWM" or "Pulse Width Modulation"

    3) IR remote control

    Start with one, and only one of the above topics. Use the search function on this forum, and also use an internet search engine. Learn what you can about the topic, then come back here and ask specific questions to complete your understanding of that one topic.

    Then choose a second topic and repeat.
     
  7. ahmedahmedahmed

    Thread Starter Member

    Nov 12, 2007
    29
    0
    i have H-bridge which drive the motor.
    also i have pwm and it is controlled by variable resistance.
    is that good or not???????

    what about IR remote control
    thanks
     
  8. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    Good work! Now you just need to figure out a way to control PWM via your IR reception. The variable resistance driven PWM might work, if you can substitute a voltage from your IR receiver in place of the variable resistor. Can you post a schematic?

    Do you have an existing IR remote control system, or do you want to design one?
     
  9. ahmedahmedahmed

    Thread Starter Member

    Nov 12, 2007
    29
    0
    SO the way to control is change variable resistance with an IR circuit.
    I do not have one. How can I design one? and is it hard to do it or not?

    thanks alot
     
  10. ahmedahmedahmed

    Thread Starter Member

    Nov 12, 2007
    29
    0
    how we can do it???????????????
    replay
     
  11. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    First, post a schematic of the PWM circuit you are considering.
    We'll look at some different IR receiers and try to come up with a plan.
     
  12. ahmedahmedahmed

    Thread Starter Member

    Nov 12, 2007
    29
    0
    there is an attachment picture showing the PWM circuit digram

    thanks alot
     
    • pwm.JPG
      pwm.JPG
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  13. ahmedahmedahmed

    Thread Starter Member

    Nov 12, 2007
    29
    0
    i need your help in IR.
    and i think that there is must be (transmitter and reciver).
    is that right??? or not

    i put PWM circuit at previous replay

    i am waiting ur replay
    thanks alot
     
  14. Voltboy

    Active Member

    Jan 10, 2007
    197
    0
    use a IR reciever that changes a digital potentiometer for the PWM.[​IMG]
    Just instead of the 500k pot use a digital pot that is changed by the IR reciever.
     
  15. ahmedahmedahmed

    Thread Starter Member

    Nov 12, 2007
    29
    0
    i put my PWM circuit. And i need to control dc motor using IR to that circuit.
    what can i do for that???
    please help me
    can i control my dc motor using LM324 IC and IR or not??? i mean my circuit???
    help me thingmaker3 please!!!!!!!!!!!!!!
    thanks alot
     
  16. ahmedahmedahmed

    Thread Starter Member

    Nov 12, 2007
    29
    0
    where is ur replay?????????
     
  17. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    Hi, Ahmed. Some of us can get pretty busy on the weekends. It doesn't mean we've forgotten you! Replies can sometimes take up to a week.
     
  18. ahmedahmedahmed

    Thread Starter Member

    Nov 12, 2007
    29
    0
    ok ok
    but i need it fast.
    anyway i will wait.
    thanks a lot
     
  19. ahmedahmedahmed

    Thread Starter Member

    Nov 12, 2007
    29
    0
    where is the replay???
     
  20. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    What control scheme have you chosen? FSK? Pulsed cod? Something else?

    Are you willing to incorporate a microprocessor in either the device or the remote control or both?

    Also: share with us the work you have done so far. That way we won't be "barking up the wrong tree."
     
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