Summary

Mini Linear Actuator using 28BYJ-48 5V stepper. Stepper is hacked to be Bipolar for more torque. Remove the blue motor cover and cut the center trace ,and the red wire.Search for the 28BYJ-48 bipolar hack for more info.A momentary pushbutton is used to control direction in the test set up.Cheap Micro Controller Arduino Nano,cheap Stepper motor 28BYJ-48 ,cheap motor controlller A4988 all can be sourced for under 10 dollars.Be sure to remove link when powering up from motor source and USB on the Nano. I am not a great programmer as witnessed by my use of goto's in the test sketch but it does work,with a lot of help from " The Dronebot Workshop". Also motor must be connected when powering up the A4988.