"LASER" copiers / printers us an electrostatic generator. Some units, perhaps from larger commercial copiers, have output voltages of many kV. Mayhaps using one of these could be an attractive solution? Given the typical cost of spare parts for most equipment, maybe not. Russell -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist