arduino - How do I make a micro-controller act as a finger on a touch screen?

I want to make a device that I can place on a capacitive touch screen and it will start tapping the screen repeatedly. Is there any way to do this with the Arduino?

Answer

This can be done if you get an Arduino plus a servo controller that has a rig that controls a stylus. The stylus must be able to work with capacitive touch screen (not all do).