My question is if I choose the right schematic for driver configuration.
The answer is no!
First of all never connect directly to the pic port any motor ( max current you can supply is 25 milliAmps) but use a current driver as the ULN2803.
ULN2803 is an array of 8 NPN darlington transitors, that you can connect directly to the port pin without any other passive components (no resistors needed) so with one ULN2803 you can drive two unipolar stepper motor with 350 milliAmps per coil.
From the schematic the motor appears to be bipolar, and if they have only 4 wires there is no way to connect them as unipolar.
Google for unipolar stepper motor to understand the difference.
Al.
Last edited by aratti; - 25th March 2010 at 11:08.
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