Quote Originally Posted by irving2008 View Post

Trying to source automatic door openers for double front doors... stupidly expensive even on Aliexpress! After all, its just a motor/gearbox and an arm and some crude position/current sensing for end points and obstacle detection... can't be that hard to make one
Stepper motor, ballscrew, driver, power supply, couple of microswitches, Arduino... can't be that hard to make one