cellwhe.blogg.se - Uln2803 stepper motor driver circuit

the Mitsumi M55SP-1N datasheet says 259mA/phase*4=1,rrect? uln2803 handles 500mA per channel and a max of 2,5A ….the ULN2803A has already lots of protection diodes.I don't want to destroy my microcontroller or any other part of theĪm i safe using a ULN2803A to drive the Mitsumi M55SP-1N at 12v from 3,3v or 5v?

It's the first time i use a stepper motor

the excitation mode is the one used in the library 2-2 Phase excitation.

So…įrom what i understand the Mitsumi M55SP-1N:

OKI EM-318 ( LB1847) from epson printerĪs you can see i only found the datasheets of the motors that i could not find the drivers datasheet.

OKI EM-154 ( STK6711AMK4B) from epson printer.

OKI EM-199 ( SMA6511) from epson printer.

With some patience and low voltage (5v) i followed the previos mentioned video description and wrote down all the wire sequences of the stepper motors i have salvaged. more cables but easier to drive.Īnyway… after breaking my only L293D i decided to try again with the famous ULN2803A. I tought it was simpler to drive bipolar motors but at the end i prefer unipolar stepper motors. After various disappointments i finally understood how to find those damn wires on stepper motors.