Stepper motor terminals id help

Discussion in 'General Electronics Chat' started by hunterage2000, Jun 29, 2014.

  1. hunterage2000

    Thread Starter Active Member

    May 2, 2010
    Can anyone tell me what the 4 terminals are for the attached stepper motor please? I took it out of an old printer and the datasheet doesn't say. A book I have says it is a bi-polar stepper where the terminals are pulsed.

    I am using an ARM mbed and the digi outputs are only 3.3V/45mA while I need 24V/500mA. Usually I would use bjt's as a switch but I,m not sure how or if that would work.
  2. DNA Robotics


    Jun 13, 2014
    Test 2 wires at a time with an ohm meter. When you find 2 that have continuity / resistance, call them 1a and 1b. The other 2 are 2a and 2b. Search online for an "H bridge" circuit as the driver.
  3. THE_RB

    AAC Fanatic!

    Feb 11, 2008
    It's a standard 4-wire bipolar stepper.

    Like DNA_Robotics said you need a h-bridge type stepper driver.

    Ebay has some full-bridge full step/half step drivers very cheap.