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  1. #1
    Join Date
    Feb 2018
    Posts
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    Controlling Stepper Motor Issue

    HI,

    I have the ULN2803 driver chip connected to the Stepper Motor, and GPIO lines from Pi driving the ULN2803 chip.However, when I turned on the GPIO line to drive the ULN2803 chip, the motor is turning but it causes power drop and lost wlan0, IP address and screen flickered. I then put a 10K resistor on the 5V power line, this time the motor is not turning and no power drop. so what's right way to handle this?

    please help

    I did not find the right solution from the internet.

    References:
    https://www.raspberrypi.org/forums/v...p?f=63&t=73485
    Corporate video animation Company

    Thanks




  2. #2
    Join Date
    Mar 2018
    Posts
    1
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    Hi...If running the stepper motor knocks out the debugger, it is most likely spikes in the power supply or EMI being picked up on the CLK and DATA lines. You might want to use opto-couplers or digital isolators for the drive signals, and use a separate isolated supply for the motor and driver. Proper capacitive bypassing, good grounding techniques, ferrite beads, and shielding may be necessary.

    pcb assembly manufacturer
    Last edited by CoraDias; 19/04/2018 at 05:48 PM.

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