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Linistepper is a stepper motor controller/driver for small to medium sized 5-, 6-, or 8-wire unipolar (not 4-wire bi-polar) stepper motors, featuring “ultra smooth old school linear microstepping” combined with active current regulation from an on-board PIC microcontroller.

The folks at PIClist are offering both PCBs and full kits for sale.

Linistepper