Shown above is a pre-assembled board I bought off Ebay for $8 with shipping. Stepper motors are very accurate and often don't need feedback to tell position.Ī bi-polar stepper motor has only two coils and operates by reversing the polarity unlike a unipolar stepper motor that operates by switching four coils on/off. The steppers I used in the example are all 7.5 degrees per-step and require 48 steps to go 360 degrees. In this example in both hardware and programming the code below will operate the stepper motor through the L298N. The Arduino series of micro-controllers are an outstanding value for the hobbyist and student to learn the basics of programming and interfacing micro-controllers. This is due to the coils being operated in series. For example if a unipolar motor is rated at 5-volts then in the bipolar mode will be 10-volts. Note the motor voltage will have to doubled. Note the motor voltage is the voltage rating of the stepper motor up to 40 volts and a current limit of four amps. In this section I've connected the L298N to a bi-polar stepper motor and connected it to the Arduino micro-controller. Earlier we looked at L298N Motor Controller Theory and Projects to understand the basic operation of the L298N dual H-bridge motor controller.
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