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Basic Electronics » Unipolar Stepper motor with ULN2003A,
February 11, 2013 by Ralphxyz ![]() |
Here is the circuit: Here is the ULN2003A specsheet I have a 6 volt unipolar stepper motor. Now my first question is should I have 6 volts going to COM, Stepper motor supply? That is what it seems like I should have, that means the end coil wires will be pulled low correct, when the motor runs? In looking at the ULN2003A specsheet I do not see how the outputs would be low so that is why I am asking. Thanks for the help, am I missing anything? Ralph |
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February 11, 2013 by Ralphxyz ![]() |
Well that works!! 6 volts to COM with common ground between the mcu and the stepper motor. Ralph |
February 11, 2013 by dvdsnyd ![]() |
Ralph, What are your plans for the stepper motors? |
February 11, 2013 by Ralphxyz ![]() |
I had always wanted to make up a XYZ table, but since I have a CNC/3D printer on order I do not need to do that now. Probable one the first thing I am going to make is a solar tracker I got a bunch of 8.5 degree steppers off a site for $.90 apiece so I have a lot to play with. This specific application was for a Peristaltic pump. The pump is missing the cover, I'll make one up with my 3D printer. Possible with the cover and electronics and tubing I'll see if I can sell them on ebay. I think I should be able to sell them for $150.00. Peristaltic pumps are being bought every day so any one who wants a precise metered flow might be interested. I'll start a new thread about the encoder. Ralph |
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