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line follower circuit

Discussion in 'Robotics & Mechatronics' started by goutam, May 29, 2010.

  1. Norlin

    Norlin New Member

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    They're NPN transistors and I'd assume that their emitter is connected to the negative terminal of your battery. It's not on the schematic, but it's probably assumed to be a given.


    Edit: nevermind, it IS on the schematic
     
    Last edited: Jun 18, 2010
  2. Norlin

    Norlin New Member

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    Also, you don't need the resistor and two red LEDs, but if you do use them, make sure you pick a resistor to match your LED pair
     
  3. Norlin

    Norlin New Member

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    Ahh, the one end of the photoresistors is likely meant to be hooked up to the positive terminal of the battery?
     
  4. dave

    Dave New Member

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  5. Transistorman

    Transistorman Member

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    the power is 6v (its up to your kind of your motor was ( mine is 12v so it can make the motor slower ))
     
  6. Dragon Tamer

    Dragon Tamer Member

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    I've seen that sandwich robot design before, I even have the book. I find that it is better if you use an op-amp with a gain of 2 for the circuit because it is less likely to stop its motor suddenly and pass right over the line.
     
  7. goutam

    goutam New Member

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    Using relays
     
  8. Norlin

    Norlin New Member

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    relays??? There aren't any relays in this particular circuit. The transistors here are sinking current and are "turned on" by the photoresistors.
     
  9. Transistorman

    Transistorman Member

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    will work fine

    the circuit will work fine if the photoresistor keep detecting/touching the black line
    [​IMG]
     
  10. vantusaonho

    vantusaonho New Member

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    This is my circuit that i designed myself: (xps file)
    Code (text):
    http://www.mediafire.com/?0h6tsht4tlo2nzq
    Sorry for i cant capture into MS Paint since it is too big with screen!
    If you can not read it, i can re-post part to part!
     
    Last edited: Sep 14, 2010
  11. 3arssharmat

    3arssharmat New Member

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    vantusaonho: can u please upload a link to ur schematics again thnx
     
  12. 4pyros

    4pyros Well-Known Member Most Helpful Member

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    vantusaonho has not posted for two years.
    Start a new thread if you need help.
     

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