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L298
Stepper motor driving with ULN2003
Stepper motor diriving with L293D
Another  motor driving circuit
 

Motor Driving Circuit

Here is one motor driving circuit. This will work surely because i used this circuit too many times. Dont apply P=Q=1 because this cause short circuit of the full circuit. This is why it is not called an H-bridge. I am using it because, i used this circuit when i started with robotics, a time when I don't
know about L293D and L298. In this motor driver ckt, i just short ckted the two ends of motor, i.e shorting Vcc and gnd, Then power transistor got heated up. That is one of the advantage of power transistor. But power still remain without any problem. So be careful to touch the power transistor in
the H-bridge circuits.