What do the pins mean?

Hi there,

This is Amina from the component engineering team.

The labels in the symbol are grouped by V (vertical) and H (horizontal) voltage dividers:

- V+ and H+ are for VCC
- V- and H- are for GND
- V and H are the voltage divider outputs

While the select button is a push button where the labels are:

- SEL- for GND
- SEL+ for the normally open contact of the switch.

These labels and footprint are taken from the manufacturer's Eagle library. Please refer to this link for more information: https://www.sparkfun.com/thumb-joystick.html