So what's the difference in hardware between the demo driver board and whatever you're using to drive them now? Are the pieces properly grounded? Do you have the proper pull-up/pull-downs on the signal lines? There's just too many questions here.
So what's the difference in hardware between the demo driver board and whatever you're using to drive them now? Are the pieces properly grounded? Do you have the proper pull-up/pull-downs on the signal lines? There's just too many questions here.