DoorLock Cycle Device

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i wondering if can give me guidance. want build process cycle door know until failure. planning use stepper motor rotation of door knob , stepper motor leaner action, move door knob in , out. want able count cycles, time, torque, having green , red led indicating test on or off, , possibly other sensors. 
i know lot appreciate help:
my questions what:
type of arduino should get? uno more enough?
what size/power stepper motor should get.
from more information on sensors arduino?
any other thoughts or suggestions?



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