So I have been browsing around and researching my options. I think CrossRoads was correct about using the Pololu 3pi style robot for this project. For it to work just like the original Turtle, the pen will have to be dead centre and the robot will have to rotate exactly around that point. Ultimately I think I would enjoy designing the robot's chasis and specs. So I'm thinking about getting a kit robot to test ideas and learn what I need in the final design.
What do you guys think about these ultra-cheap kits from China:
http://www.ebay.co.uk/itm/171056734576 ?
I'm thinking for testing it will work out fine. Or should I double my money and go for something like this:
http://www.ebay.co.uk/itm/130936585418
Views welcome