Homebrew PCBs

lcdpublishing wrote:

>rig only requires a moderate amount of precision in construction and 
>about the only "critical" item is the hinges - you wouldn't want 
>sloppy ones.  But otherwise, it don't get much simpler than that.
>
>  
>
  Intersection of two areas of free play that are barely touching is 
reasonably close to a point or line.  A couple of cheap ($.88 last time) 
hinges from Lowes, slightly misaligned to one another so each excludes 
the other's play, works fine.  Even when you use the good drawer rails 
for linear motion, it's best to do the same and get rid of most of their 
free play..  Got too much free play when aligned exactly parallel, then 
don't align them parallel.. :)

Alan