Message-Id:   <3.0.6.32.19990722153821.0079aae0@engr.ucr.edu>

Dear Members:


    I am measuring  the electric current of a rotating body, and tried
using carbon brush.  Unfortunately, the brush did not work well and the
current shifted tooo much.   Does anybody know any technique for measuring
current of a rotating body?  Any suggestion will be highly appreciated.

Zuoyi Wang