I understand that many people in MEMS consider this old, given-up technology. I wanted to know more about a DIY voice coil actuator. It is for an inexpensive student project. I wanted to use raw materials including Piezo-electric horns, Electro-static speakers, Ribbon speakers or Electrodynamic voice coil based speakers using a continuous cleaned DC. I wanted to know if anyone knew anything about hysterisis parameters and excursion details of different voice coils and any preffered materials over others. Any input is greatly appreciated Thanks Sincerely A-Mani A-Mani@A-Mani.com (949)-55A-Mani _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp