Homebrew PCBs

Hi all,
Anyone heard of a chip called a L7180 that used to be made by SGS? I have a board with about 40 on it and thought that it could be good to drive steppers but I have no info. When I saw the circuit with the L298's on it I went to the junk store and dragged it out. I think it may have come from a Line Printer. There is also a driver chip called a L6503 Have tried searching the net and Chip Directory et. but no luck so far. Seems a shame to toss it out.
I've been following this group with great interest trying to learn a bit about CNC and thinking about building a machine to drill circuitboards and cut out parts for model aeroplanes. I have built various stepper drivers in the past mainly to rotate bits on scientific instruments.
Cheers,
Paul Waller
University of Tasmania
Australia.


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