Electronics > Beginners
please suggest module to control a two-phase stepper mottor
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exe:
I bough small stepper motors for a project and just realized I don't know how to control them. They are very small, I thought can just hook it to my signal generator and play with it. Now I'm thinking that an inductive kick may kill the signal generator  :-BROKE... So, I'd like to buy a dedicated driver for experiments, but I just realized I don't know what to buy. Do you have any suggestions?

To my surprise there are different types of stepper motors, and they are driven differently. Mine seems the simplest type, it's just two coils without any taps. I did some research, it seems I need two H-bridges to control it because the control signal is bi-polar. Am I correct? If so, what IC or ready module would you suggest? Preferably a small module because the servo is very small and doesn't require much power.

This is stepper motor I have: https://www.aliexpress.com/item/1523213660.html?spm=a2g0s.9042311.0.0.27424c4dQPazQF

Here is the description from the seller:

--- Quote ---2 phase 4 wire(A/B/C/D) stepper motor stepper motor micro stepping motor mini DIY
[] 3-5V drive voltage
Two-phase four-wire stepper motor has two windings: A, B. A winding through the forward current use (+ A) represents; through reverse current use (-A) represents. B winding expressed as above.
Energized order:
Two-phase, four-beat: (+ A) (+ B) - (-A) (+ B) - (-A) (-B) - (+ A) (-B) -
Single-phase, four-beat: (+ A) - (+ B) - (-A) - (-B) -
Eight-shot, half: (+ A) (+ B) - (+ B) - (-A) (+ B) - (-A) - (-A) (-B) - (- B) - (+ A) (-B) - (+ A) -

--- End quote ---
Nominal Animal:
I like to use the DRV8834 for this kind of small stepper motors. It works with 2V to 10V motor voltages, has microstepping support, and is trivial to connect to a microcontroller: just two pins, STEP and DIR.  The existing DRV8834 stepper driver boards have a small potentiometer for controlling the current.  DIR controls the step/microstep direction, and rising/falling edge of STEP causes a step/microstep rotation.
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