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  1. 19-01-2021 #2
    Doddy's Avatar
    Lives in Preston, United Kingdom.
    Doddy
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    Quote Originally Posted by JohnT View Post
    The circuit diagram below if i understand correctly. The drives output a 12v step and dir. The step and Dir is connected to the collector from the transistor and the emitter to ground. The 5v output from the BOB is connected to a 2k resistor and connected to the Base. When ever the BOB pulses the 5v it pulls 12v from the driver to ground?
    That circuit - if the BoB is outputting 5V, it will let the input to the stepper driver float to 12V as reported. If the BoB output is 0V then the input to the stepper driver will be dragged to 0V.

    You draw the BoB with an output transistor - as shown this inverts the 'step' signal from the BoB - is this your intent?
    Last edited by Doddy; 19-01-2021 at 06:35 PM.
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