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  1. 10-11-2009 #7
    Ross77's Avatar
    Lives in Devon, United Kingdom.
    Ross77
    Last Activity: 09-03-2024 Has been a member for 9-10 years. Has a total post count of 759. Received thanks 27 times, giving thanks to others 52 times.
    Modulating the vref would make sense as no holding current isnt much use. Is that why a Pic is used rather than a 555?

    I did find another cuircuit that uses logic gates to trigger 2 separates trim pots but the control signal came from an external source or the software. would it be possible to use a 555 chip to trigger this circuit?


    This would make more sense and be easier to setup
    Attached Thumbnails Attached Thumbnails 4AStepperMotorCard_V1_2.pdf  
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