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Thread: what's wrong with this layout???

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  1. 04-01-2009, 04:42 PM #1
    chepot
    chepot is offline Registered
    Join Date
    Apr 2009
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    28

    what's wrong with this layout???

    please see the attached image.

    it's stepper driver board: 2xL298 (parallel), with diodes and sense resistors, capacitor & connector.

    at first I made the small one, it work well (the yellow line is correction -> i forget to connect common ground) the problem is the space is to tight for L298's heatsink and big diodes.

    then I make it bigger, and the problem come...the motor now have noisy sound.

    color on layout:
    green = ground
    red = vss (24v)
    pink = vcc (5v)
    blue = L298 output for bipolar stepper

    where are the mistakes?
    Attached Thumbnails Attached Thumbnails driver2.jpg  
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