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Hi I am using P89V51RD2 to run two stepper motors(4 phase) on port 2. I have connected two different motor drivers for each motor(L293D).The system worked fine for sometime,but then for some reason, controller blew up.Then it happened to two more chips. Drivers have a regulated 12V supply. Can some one figure out the reason?
The diodes are not required,as l293d has them in-built. If the wires from the l239d to the motor is of any length, diodes at the motor may still be required
Erik