> How is it done on the Drum.  I thought they were metallic also.

The drum has a thin coating of material (used to be selenium based,
perhaps not anymore) that has high resistivity except when exposed to
light.


*****************************************************************
Embed Inc, embedded system specialists in Littleton Massachusetts
(978) 742-9014, http://www.embedinc.com

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu