hi all
thanks for who replied me on the stepper motor it closed now #*&%@#$@!

i got PCB board that used to control some motors
and then this boars stopped working and it is using at89s51 uC and i found that the error was an ic interfaced with the uC and the factory of this machine
cleared the ic data and number from the ic surface
if thier a way to know the ic tell me? i thought its ULN2003
but iam not sure of it so any help?
or i should make my own board ?