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Help with motor driver module

jehielmartinez

I make an Arduino standalone to drive a simple bluetooth RC Car from my Android phone. Using a

ZITRADES L9110S DC/Stepper Motor Driver Module, a Tamiya double motor gearbox and a HC-06 Bluetooth module.


When I run my code on the Microcontroller eveything works fine, then I plug the Motor Driver  and everything fails.

I need help with this issue? I dont know what's the problem.

I plug just one motor and works, but it doesnt works with the two motors plugged on the Driver Module.

T


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  • 0

    Thank you for your reply.

    Here's the problem more detalied. Sorry for the crappy solder job. I was soldering and desoldering things trying to fix it

    image

    image

    WHEN I CONNECT  THE MOTOR DRIVER VCC TO THE POSITIVE JOINT ON THE BATTERY PACK WITH A ALLIGATOR CLIP. IT WORKS!!

    image

    THEN I CONNECT THE DRIVER VCC TO POSITIVE 5V ON THE OUTPUT OF THE L7805 WITH AN ALLIGATOR CLIP. IT WORKS!!

     

    image

    OK! I WILL SOLDER THE DRIVER VCC TO THE OUTPUT OF THE L7805. IT DOESN'T WORK!! image

    image

  • 0 in reply to jehielmartinez

    there is no simple reason the lsat two should not behave the same way

     

    there is an observation on the routing of your wire though

     

    in the working version where you connect to the output of the 5V reg will clip, the wires are away from the cpu pins

     

    in the soldered version your running the power to the driver right over the XTAL pins, dont so that, route the power to the motor away from the CPU pins, especially the oscillator. This may fix your issue , th theory being the noise from the motor is affecting the CPU oscillator

     

    also add a small value decoupling capacitor at the motor connector end of your pcb maybe 100nF ish, this will help to eliminate the noise feeding back from the motor control

     

    Worth a shot and fits your symptoms

     

    let me know what your results are

Reply
  • 0 in reply to jehielmartinez

    there is no simple reason the lsat two should not behave the same way

     

    there is an observation on the routing of your wire though

     

    in the working version where you connect to the output of the 5V reg will clip, the wires are away from the cpu pins

     

    in the soldered version your running the power to the driver right over the XTAL pins, dont so that, route the power to the motor away from the CPU pins, especially the oscillator. This may fix your issue , th theory being the noise from the motor is affecting the CPU oscillator

     

    also add a small value decoupling capacitor at the motor connector end of your pcb maybe 100nF ish, this will help to eliminate the noise feeding back from the motor control

     

    Worth a shot and fits your symptoms

     

    let me know what your results are

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