28BYJ-48 stepper motor driver....ULN2003 or L298N? Answered
Hi, My goal is to have the 28BYJ-48 stepper motor turn clockwise and then counterclockwise periodically, like a pendulum motion. I have built a circuit using ULN2003 Darlington Array since most tutorials online use that. But recently I've seen some sources using the L298N Dual H-Bridge. Questions: Is it more efficient to use to L298N? I heard the ULN2003 draws more current than it needs. To add to the confusion, although the 28BYJ-48 is an unipolar motor, it can be ran in bipolar mode as well. Is the L298N only for bipolar mode?
Here is the date sheet of L298N
Does running a motor in bipolar mode offer twice the electrical efficiency than unipolar mode? In another word, if the load is the same, battery is twice as long (theoretically)? Please advise. Thanks