Help with making a wind up mechanism for a large piece
I have attached a simple diagram of the kind of motion I am after - the idea being that a a few twists of the wind up mechanism will spin the gears and wheels for 5-10 seconds or longer if possible! The motion is only decorative and the wheels and cogs would be made from laser cut plywood 6-9mm thick. This will go in the background of an illustrative, laser cut sign made up from layers of laser cut plywood, my work can be found here - www.tomsky.co.uk .
I am a beginner at this, so would gladly welcome to any suggestions, resources or alternatives to creating this kind of motion! The only thing is that it needs to be physical, old fashioned mechanics rather than using any kind of motor.