ULN2003 and Stepper
C.Moher
Posts: 35
Howdy Folks. Brand new to this group and making my first post. I have a Stamp 2, a ULN2003 driver and a five lead stepper motor. Could any of you please tell me how to hook them up ? I take it the Stamp outputs go straight into the driver, but, how does the motor connect to the driver. Since I can see no power connection·on the driver datasheet, I take it one or more of the coils gets hooked up to some value of DC and the driver, in fact, sinks the current to operate the motor ???? I should be OK on my own with the code. Ideally, if you know of a schematic out there, that would be great !! Thanks !!
Comments
·· You can find an example of connecting a 5 wire (4-phase unipolar) stepper motor in the StampWorks manual, of which a PDF can be found here.· Page 150.· The connections for the ULN2003 shouldn't be too hard, although this example uses the L293D.
http://www.parallax.com/dl/docs/books/sw/Web-sw-v2.0.pdf
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Chris Savage
Parallax Tech Support
csavage@parallax.com
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Sid Weaver
Do you have a Stamp Tester yet?
http://hometown.aol.com/newzed/index.html
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Perhaps you'd like to compare the way you wired it, to the way that was suggested, so that doesn't happen again:
From newzed's post:
Pin 8 goes to ground. Pin 9 - com - goes to the positive side of whatever voltage you are using for the outputs, 5V, 9V, 12V, anything up to 40V.
Regards,
Bruce Bates
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Jon Williams
Applications Engineer, Parallax