Homebrew PCBs

Agilent makes the internals for optical mice. 

http://www.home.agilent.com/USeng/nav/-536893644.536905699/pd.html

--- In Homebrew_PCBs@yahoogroups.com, "mikegw20" <mikegw20@h...>
wrote:
> Thanks all for what turns out to be a lively dicussion.  However,
as a 
> follow on assuming that I have backlash compensation (by whatever 
> means) Do you know of anyone using an optical mouse as a linear 
> encoder?  They way I figure it is indeed possible to communicate to
the 
> ps/2 port and optical mice have resolutions in the 400lines/inch
(some 
> much better).  
> 
> Has anyone used an optical mouse for postion sensing?
> 
> Mike