Homebrew PCBs

At 07:56 12/06/2002 -0700, you wrote:
>I also saw a link for: http://www.futurlec.com/StepperMotorController.html
>which are 4A bipolar stepper drivers for only $18 ea. I haven't used them,
>so can't comment on their capabilities. You should be able to use your
>unipolar motors in a bipolar fashion.

I believe the spec of this board to be a little misleading - the L298 
(which this board uses as its output stage) is rated at 2A/phase 
continuous. You won't be able to drive a 4A/phase motor with this! Also, 
you would be well advised to keep the voltage below 50V.

Check the L298 spec sheets out on the SGS Thompson site:

http://us.st.com/stonline/index.shtml

Use the product search on "L298" to find the datasheets.


Regards,
Tony