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Stepper Driver With UDN2559

As the ULN2803 is in the "last orders" phase, alternative designs are being made. Here is a version of the stepper motor controller board that uses the UDN2559 or UDK2559 driver chip from Allegro.

Note that the UDN2559 must be soldered to the board for its internal heat sink and wide legs to effectively dissipate heat when being run close to the limit of 700mA.

-- Main.VikOlliver - 26 Feb 2006

  • First attempt at UDN2559 stepper driver.:
StepperDriverWithUDN2559-2559 Stepper board prototype.jpg