Hi Guys, I'm saying HI to everyone, since I'm a newbie here. :) I'm building an amplifier using OPA454 to drive a piezo. The op-amp will be a dual power supply using +/-30V power supply. I was wondering if you could help me out design a +/-30V power supply from a +12V power supply. Kindly recommend to me boost regulators and give me tips on the circuit design. Any help would be very much appreciated. Thanks! Joemill --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .