I cant get a stepper motor to work with arduino UNO [duplicate]

Question

This question already has an answer here:

Problems running Arduino project off a 9V battery (1 answer)

Closed 3 years ago.

I'm using an arduino UNO with a L2989N motor controller with a nema 17 hanpose 17h3401 stepper motor. I'm using two 9 volt batteries in series to power it. I'm sure I connected them properly but it just doesn't work. I tried using the example stepper motor sketch stepper_oneRevolution but it didn't work. I just cant pinpoint what's wrong. PS. I'm very new to this

• chrisl: standard 9V block batteries? They are not made for providing that much current. You need other batteries

Answer 1

It is highly likely your power source supplies insufficient current to power both the stepping motor and the Arduino reliably.

This is very similar to one of my past stackexchange question / answer.

Where I say ...

Consider using a power source which can supply more current. For instance, D size cell batteries can supply much more current than a small 9 volt battery.

... all that said, stepping motors are high current devices. It may not be feasible to run stepping motors off batteries.

• Gil: Can you post a schematic as you have wired it showing all connections. You connect a lot of things but to what? Also post links to the hardware items. I did not find the L2989N motor controller.
• st2000: @Gil, if you are asking questions of the O.P. then you might put your comment after the Question and not after the Answer. Then the O.P. might get a notification instead.
• st2000: @김준호, do edit your original post instead of posting an answer. Otherwise it is confusing as people can and do sometimes answer their own questions. A L298 does not appear to have a 12v to 5v regulator. But maybe there is one on the board you bought? Do you have a link to that product? What a battery can power depends on more than it's chemistry (LiPo) or voltage (14.8V). Maybe try 2 different batteries. One for the Arduino and another for the motor. As a test if nothing else. Just so you know, some large steppers may need the likes of a motor cycle battery to keep running.