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You can make them. basically you have to be able to pulse square waves. Controllers can be bought from Jaycar. cjeck your local store, RS components.
I have just bought and it arrived today, a usb stepper controller. plug it into the usb port, attach 12volts to power the motors and now i can control 3 x stepper motors separately from code thru the usb port.
I will review it tonight and let you know
cost $85 + freight + gst.
For $85, i could not be bothered making myself, but it can be done
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