That does not ship to India.Hello,
You could have a look at this:
http://www.ebay.com/itm/3-35-to-1-2...471612?hash=item419bd796fc:g:QTYAAOSwu4BV5CUs
Bertus
Stepper motors will whine in normal operation (like a transformer) because of the rapid charge and discharge of the coils in the motor. The iron actually changes shape under a magnetic field - google magnetostriction and other resonances of the system. (See "coil noise").That does not ship to India.
With the above supply i want to drive a stepper motor.
Means if the if input voltage of battery is 3.3V , the output should be 4.2V for stepper motor driver which drives stepper motor .
Because at lower voltage the the performance of of the motor degrade. and there is some audible sound.