An input pin ( fachsprachlich English stylus or stylus ) is a pin which is used to operate touch screens on computers, mobile phones, handheld consoles, PDAs and graphics tablets. The stylus consists basically of a plastic pointer with a softer plastic core. The shell is hard and gripped and the softer core emerges at the tip and is designed to touch the screen as gently as possible ( ie without the danger of scratching ).
By the stylus a more precise operation than with your fingers is possible, since only the thin tip touches the screen. Furthermore, preventing the pollution of the screen from fingerprints.
Depending on the device pen pressure and pen inclination can be measured and recorded.
For devices with a capacitive touchscreen conductive pins are required.