Unipolar Stepper motor Driver CIrcuit

Purpose : to run and control a uni polar 3.36V 2.9A Stepper Motor

I want to fabricate a driver circuit using transistors and diodes.

I want to control 3 of these so which arduino board should i use ?

Please provide links or Diagrams.

Thanks in advance

Google "unipolar stepper driver schematic" for a very large number of possibilities.

The simplest way is using ULN2003 or ULN2803, if consumption of the coils is less than 1A. For bigger motors you can use 4 darlington transistors.

ganeshrk95:
Purpose : to run and control a uni polar 3.36V 2.9A Stepper Motor

I want to fabricate a driver circuit using transistors and diodes.

I want to control 3 of these so which arduino board should i use ?

Please provide links or Diagrams.

Thanks in advance

How many wires does this motor have? A 1.15 ohm motor is designed for bipolar use,
not unipolar. If the motor has 6 or 8 wires then you should drive it as bipolar with
a chopper-drive stepper drive module capable of 3A.

If it has 5 wires you cannot use a chopper drive and may as well drive it unpolar, but
its an exceedingly bizarre motor if so.

If you do drive this motor as unipolar it will achieve about 30rpm max i’d hazard.

Hey guys Sorry for not replying !

It has 6 leads. Can you please give me any link or something ?

You can use that as a bipolar motor with a power supply capable of more than 3 amps at 7 volts or greater, but there don't seem to be any hobbyist-type motor drivers that can handle 3 amperes/winding.

If you want to get the full rated power out of the motor, you will need an industrial chopper driver. If you are happy with less power, you could use one of these Pololu - DRV8825 Stepper Motor Driver Carrier, High Current and set the current limit to about 1.5 amperes/winding to avoid overheating the driver.

Yes, that's definitely not the sort of winding resistance you'd expect in a uni-polar
motor at all.

0.2 .. 5 ohms, 4 wires - hi-performance bipolar with constant current driver
20 ohms +, 5 wires - unipolar only
10 ohms +, 6 or 8 wires - unipolar or low-performance bipolar (H-bridge drive)

Your motor is odd in having 6 wires, the centre-taps aren't useful.