I am completely without any knowledge and would like to get help. First let me explain what I am hoping to accomplish.
Well, we don’t get that here very often…
I need to know what circuitry/processors or stepper drivers to use/arduino.
You seem to have already chosen the processor, have you not ?
How are we supposed to explain the circuitry to you if you have no knowledge/experience of electronics ? Are you sure you are not biting off more than you can chew ?
For starters, what do you know about the sensor ?
How do you plan to drive the stepper motor ?
We’re kind of at a disadvantage here. You have given us next to nothing to go on.
Are you asking us to recommend a stepper motor driver ?
If so, are you going to tell us the electrical specifications of your motor so we can match the driver to the motor ?
How do you plan to build this ? (Breadboard, soldered point to point , PCB, etc…)
How about a little more information ?
SEE PAGES 5 & 6 of this. (for step-sequence info)
FYI, you need to establish some parameters/specifications:
stepper shaft speed
steps to open gate
steps to close gate
I assume you already have the proper stepper motor chosen and the shaft coupling/linkage designed/selected .