Fork of
PID
by 
Aaron Berk
History
Modified scaling to make it double-ended.
2015-05-01, by mitchpang [Fri, 01 May 2015 00:42:08 +0000] rev 1
Modified scaling to make it double-ended.
Version 1.0
2010-09-02, by aberk [Thu, 02 Sep 2010 16:48:10 +0000] rev 0
Version 1.0