I am hoping to use an old usb mouse to do some cool stuff.
some of the ideas i have is a tachometer/speedometer for my bike.
or some kind of data logger for a little motorized car i am building, the type of robot that senses an object and then turns. using the mouse sensor to keep track of its movements can then later be used to map a room, or objects in a room...
what i have done so far is taken the mouse apart and gotten the board out and figured what the pin outs are.
applied 5 volts/ground to the correct pins and confirmed that the button, for example, has 5 volts getting to it when open. 0 volts when pressed.
i then try to see what voltage was at the data pins and i got none. but this may be because i was measuring voltage between -D and +D and i am not sure if that is correct. according the wikipedia page (http://en.wikipedia.org/wiki/Universal_Serial_Bus
) it seems that i should be getting between 0 and .3 volts for low and 2.8 and 3.6 for Hi but i am not seeing anything on my meter regardless if i push the button or not.
so, my questions are:
1) should i see voltage at the Data pins?
2) can i connect them to a analog pin on my UNO and then read what the mouse is spitting out on the serial port?
3) any other advice or knowledge to get me started?