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Kushal
06-06-2007, 08:58 AM
Does any one have an idea about driver for unipolar stepper motor.
I tried with ULN2803 it didn't worked, so any other driver......

a7400
06-06-2007, 10:14 AM
well you could use H-bridge ICs l293d,l298 or you could also use unipolar stepper motor drives SLA series...SLA7024/32

yogi
06-06-2007, 05:49 PM
what about the specifications of the stepper.
ULN can drive upto .6A

You can even go for transistor based circuits


Bibin John
www.bibinjohn.tk

docel
06-06-2007, 05:57 PM
If your pulse train was correct for stepper, dont see why it did not work....unless:
1. The current and Voltage rating was wrong
2. The coils were wired in wrong sequence
3. The stepper is dead

Check out the connections to the motor.
You can post a pic of the wired circuit.

firoz
06-10-2007, 08:25 AM
try LINISTEPPER.
it use a single PIC and some mosfets to drive the stepper motor.u can do micro stepping with this.

dan
07-20-2007, 08:40 PM
Why not give this ckt a try
http://madan.wordpress.com/2006/06/24/stepper-motor-driver-circuit/
and
http://madan.wordpress.com/2006/06/29/exact-circuit-and-microc-code-for-stepper-motor/

sum1sum
08-30-2007, 11:51 PM
Hello sir,

We are building a micromouse using stepper motors. We have 2 stepper motors with following ratings-
1. 3.5V , 0.7A
2. 3.8V , 0.67A

The ratings of the two motors are different and we have to overdrive the motors at around 12V.
For that purpose we are using IC SLA7024M (ALLEGRO MICROSYSTEMS) which is a PWM CHOPPER
IC.
So, we are facing certain difficulties,plzz help to sort them out.

1. Can we overdrive the stepper motor of this rating at 12V?
2. Which IC is better to use for driving it-IC SLA7024M or IC UCN5804B?
3. If using IC SLA7024M , how the current through stepper motor is to be controlled?
4. Will the different ratings of the two stepper motors affect the response much?

thanxx a lott...........

gyaanguru
11-17-2007, 08:39 PM
hey u mentioned SLA7024 stepper driver.
could to tell me exactly from where i can buy these in mumbai...
i have tried but no luck...
plz
thanx