Society of Robots - Robot Forum
Electronics => Electronics => Topic started by: drinu on June 14, 2014, 02:32:10 PM
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Hi all,
I bough the CW5045 stepper motor driver.
Datasheet: http://cnc4you.co.uk/resources/CW5045.pdf (http://cnc4you.co.uk/resources/CW5045.pdf)
I will be connecting the STEP, DIR and ENA to a PIC microcontroller. Do I need to include a current limiting resistor with every input or should I connect them directly to the PIC output?
If a resistor is requires, what value would be suitable?
Thanks in advance.
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On the 4th page of the data sheet you referenced, it shows that inside the driver, each of these inputs has a current limiting resistor and an LED (for optical isolation), with the current required being < 20 ma. If the data sheet is accurate, that would suggest that additional current limiting resistors would not be necessary or desired.