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DIY AstroEQ / Re: Arduino DIY - back EMF question
« on: May 23, 2016, 19:56:05 »
Hi Tom, thanks for the reply and explanation. I kinda thought you had this covered but thought I would check to be on the safe side.
Great work with the project, keep up the good work.
Cheers,
Dave.
Great work with the project, keep up the good work.
Cheers,
Dave.
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DIY AstroEQ / Arduino DIY - back EMF question
« on: May 22, 2016, 17:40:12 »
Hi all,
Great project, so cool. I decided to go the Arduino route, the motors are mounted and now I'm looking at wiring everything up.
I'm new to the forum so apologies if this question has been asked before. I've used an Arduino before to drive stepper motors and my concern is the amount of back EMF that could result if I manually slew the scope. Looking at the circuit schematic I couldn't see any diodes there to prevent this happening - am I missing something? I don't believe the Pololu 8825's are up to protecting for it?
Thanks.
Great project, so cool. I decided to go the Arduino route, the motors are mounted and now I'm looking at wiring everything up.
I'm new to the forum so apologies if this question has been asked before. I've used an Arduino before to drive stepper motors and my concern is the amount of back EMF that could result if I manually slew the scope. Looking at the circuit schematic I couldn't see any diodes there to prevent this happening - am I missing something? I don't believe the Pololu 8825's are up to protecting for it?
Thanks.
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