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    Anyone used 28BYJ28-5v Stepper with ULN2003 Driver ?

    Arduino
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    • salmanfaris
      salmanfaris last edited by

      Hi, Anyone has experience with 28BYJ28-5v with ULN2003 Driver. can't find any documentation.

      Geethesh 1 Reply Last reply Reply Quote 0
      • Geethesh
        Geethesh @salmanfaris last edited by Geethesh

        @salmanfaris click this pdf

        salmanfaris 1 Reply Last reply Reply Quote 1
        • salmanfaris
          salmanfaris @Geethesh last edited by

          Hi @Geethesh,

          Thanks for the quick replay, the pdf is about 28BYJ-48 model it's comes with 5 pins, but I need 28BYJ-28 it comes with 4 pins.

          Geethesh 1 Reply Last reply Reply Quote 1
          • Geethesh
            Geethesh @salmanfaris last edited by

            @salmanfaris ok

            1 Reply Last reply Reply Quote 0
            • kowshik1729
              kowshik1729 last edited by kowshik1729

              @salmanfaris I've not used the same version of the stepper motor that you've mentioned but I've used 12V stepper motor with ULN2003 motor driver. So probably I can help you with the queries.

              Firstly all the tutorials on the internet show how to connect your motor's wires to ULN2003. But, in reality when you buy those motors the wires color codes may be changed, so in that case, we need to use a multimeter and check the resistance of the wires. 2 wires will have the same resistance and other 2 wires have the same resistance and the leftover one is a ground wire. This way we can get to know which wire must be connected to which port of ULN2003 driver. This is the common doubt all get while using ULN2003.

              1 Reply Last reply Reply Quote 1
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              • @codelery Awesome. That's great news. Kudos to @rafitc99 . 🙌

                @codelery Please keep us updated about your project, looking forward to seeing it in action 🤩

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              • C

                @rafitc99 I changed the buffer and that solved the problem. Thanks a lot for coming to my rescue.

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              • C

                @salmanfaris I did change the buffer size and everything is working perfectly. Thanks coming to my rescue.

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              • @codelery said in Help needed: Arduino Wireless Notice Board project:

                I am using the hardware serial (pin 0 and 1 on Arduino Uno)

                As @rafitc99 mentioned, you need to expand the Serila buffer, in the hardware serial also the Arduino board package implements a 64-byte ring buffer for send and receive on the hardware serial messages. So you need to change that to 256 as per your message length.

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                @rafitc99 The thing is that I am not using the SoftwareSerial library in receiving the message from the first microcontroller. I am using the hardware serial (pin 0 and 1 on Arduino Uno)

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