===== DIY Stepper Data =====
  * {{ :2019:amazon.com_elegoo_5_sets_28byj-48_uln2003_5v_stepper_motor_uln2003_driver_board_for_arduino_camera_photo_2019-02-03_7_27_25_am_.html |Amazon Listing}}
  * {{ :2019:stepper.ino.txt |Stepper Arduino sketch}}
  * [[Photos from ELEGOO listing]]
  * {{ :2019:jangeox_blog_stepper_motor_28byj-48_2019-02-04_9_34_05_am_.html |28byj-48 stepper blog}}
  * {{ :2019:jangeox_blog_change_unipolar_28byj-48_to_bipolar_stepper_motor_2019-02-04_9_37_08_am_.html |Convert 28byj-48 stepper to bipolar}} Increases torque significantly but needs H-driver