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Arduino

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  • I don't think the motor will be your problem. I think the arduino is in danger. If the motor is powered 0.4V higher than specified, who cares. But you try to draw 800 mA from the arduino 3.3V output. That's too much. Just use an external power to drive the motor, not the arduino. BTW: I assume you' ll use a L9110 Module with two driver chips. One L9110 alone is only useful for DC motor; not for steppers. Commented Jan 29, 2021 at 16:17
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    It may just because I'm not completely awake, but I'm finding it difficult to follow your wiring description. A diagram or schematic would be better. Commented Jan 29, 2021 at 16:17
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    It is unclear from your description / question if you are connecting a stepping motor directly to the pins on an Arduino. Further, we do not know which Arduino you are using. But, in general, an Arduino's outputs are likely directly connected to the processor. And there are no (or very few) processors that can survive getting 800mA pulled from one of their output pins. So do be very careful or you may burn out the processor. Commented Jan 29, 2021 at 16:20
  • Oops... I powered it directly from the arduino... but it's still alive(I think) Commented Jan 29, 2021 at 17:46
  • Is it fine if I used a 1n4007 diode to "protect" The Arduino UNO from The Motor? Or it will be useless?? Commented Jan 29, 2021 at 19:27