Now that I've found out how to link to Dropbox images, this might help explain things better. With the wiring as shown, I stuck an oscilloscope probe on output B of the Mosfetti, referenced to Gnd on the Pi, and got trace shown, fairly nice square wave pulses at 1mS intervals (exactly as the python script calls for). I can't measure what the stepper driver output is doing (ie the NEMA17 motor connections) as my oscilloscope is only rated up to 30v.
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The suggested typical connection shown in the driver data sheet shows an NPN transistor, and MonkMakes tell me that their N-type mosfets can be connected in exactly the same way. What they don't say is what to do with the +ve terminals on the Mosfetti Board:
![Image]()
The suggested typical connection shown in the driver data sheet shows an NPN transistor, and MonkMakes tell me that their N-type mosfets can be connected in exactly the same way. What they don't say is what to do with the +ve terminals on the Mosfetti Board:
Statistics: Posted by Newlands — Sun Mar 16, 2025 11:14 am