connection of L298N to arduino

Discussion in 'Digital Circuit Design' started by lerouge2, Feb 14, 2018.

  1. lerouge2

    Thread Starter New Member

    Dec 28, 2017
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    Hi all
    I want to use an L298N with arduino in order to drive two motors and be able to change the rotation movement.
    after some research I came with the scheme in attachment
    I was wondering if my scheme is correct ?
    Also do I need the 0.5 ohm resistors ?
    thanks in advance.

    arduino_L298N_lerouge2.gif
     
  2. AlbertHall

    AAC Fanatic!

    Jun 4, 2014
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    That's probably correct but the resolution of the image is too low to be sure of pin numbers.
    You only need the resistors if you are going to control the current by monitoring the voltage across those resistors.
     
  3. Reloadron

    Distinguished Member

    Jan 15, 2015
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    Yes, take a look at the data sheet. Note pins 1 and 15. Less a path to ground through those two shunt resistors there would be no outputs.

    @albert, will it work less the resistors? Less the resistors we would ground pins 1 & 15 correct? I agree they are only current shunts but we would ground those pins.

    Ron
     
  4. AlbertHall

    AAC Fanatic!

    Jun 4, 2014
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    Yes, resistors of zero ohms :)
     
  5. Reloadron

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    Thank you Mr. Hall. :)

    Ron
     
  6. lerouge2

    Thread Starter New Member

    Dec 28, 2017
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    thanks a lot; it works.
    I noticed the L298N gets hot a little bit;
    Is the device reliable if I keep it running for a very long time ?
     
  7. Reloadron

    Distinguished Member

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    Working within its rated current it should run indefinitely and it does have thermal protection so should shut down if over temp.

    Ron
     
  8. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    A "little hot" or a blister on your finger after a half second to a second (on the plastic body).

    Those can handle some surprising temps (130°C)
     
  9. dendad

    Well-Known Member

    Feb 20, 2016
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    Do you have it mounted on a heat sink?
     
  10. AlbertHall

    AAC Fanatic!

    Jun 4, 2014
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    If you can keep your finger on it then it doesn't need a heatsink.
     
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