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…
and also i looked at the Schematics and I dont know what is BTN on the pcb board??
Read! :blink: … From the link you posted: “…An SMD momentary switch is placed under the trackball to give you a select switch. The BTN line will be pulled low when the switch is pressed…”
How it works…?
From the Hall-Sensor datasheet: “…AN48841B Low current consumption, high sensitivity CMOS Hall IC Operates on Alternating Magnetic Field (low-speed rotation for lock detection)…”
-> it seems to switch high/low on change of the sensed polarity. But I don’t understand how it can tell you about the direction. - Assumed, the paired magnets have exactly the same polarity position (can be, since they can “freely spin”, they are not “locked” to each other), how could you find out the direction?
I think you have to buy one, connect it to an oscilloscope and try to find out more.
Greets, Roger
PS: Connect to DIN