Thanks Bill, I will look at Sipex. I have also found the Supertex web site which has some excellent info. Best Regards, Gerry. -----Original Message----- From: William Chops Westfield [mailto:billw@CISCO.COM] Sent: 27 November 1998 23:39 To: PICLIST@MITVMA.MIT.EDU Subject: Re: Fw: Electroluminescent panel power controller. Note that there are chips designed just for driving EL displays. Sipex is one manufacturer. These apparently use dI/dt type drivers, along with the minimal current requiresmenst of EL displays, and achieve high volatges with a simple (external) inductor, and a couple of external resistors for timing. BillW