The video shows what I need (almost)

http://www.youtube.com/watch?v=ZIQKf98cAMk

For my project I need servo to rotate 90 degrees when I give it a short signal.
It need to move back to initial position next time it gets very same signal.

Would it be easy to program it?
Do I need anything else not included in the video?

Anyone interesting in making it for me? (Off course I'll pay)

 

Very easy to program (a few lines of code at most)... I think you should google "arduino servo" and start reading/learning for yourself. There are TONS of super examples/tutorials all over the internet..

 

Arduinos are very easy. I bought the standard arduino co.troller board and mounted ther motor drive board on it and had a cheap ebay stepper doing acceleration profiles in less than one afternoons work.

Spend a day reading the documentation of your arduinos and about stepper motors then dive in. They are great fun.