This sensor trackball looks pretty cool. similar to a xy pad (which i can't seem to find on the internet)
http://www.sparkfun.com/commerce/product_info.php?products_id=9320
What board do i connect this too, ain, din?
if it works, can i multiplex these?
and also i looked at the Schematics and I dont know what is BTN on the pcb board??
any help would be great...