> > Tell us how you are trying to do an unknown thing and we may not be > able to help. > Tell us what you want to achieve and we'll tell you how to achieve it. Hi Russell I've sorted it now, changed how I was doing it, basically now a high gain NPN after two diodes from the left and right channels, with it connected to the base of a PNP(power), which controls the supply to the fan, with some caps and resistors in there to smooth fan operation out. Fan runs at varying speeds from 0.7v rms to 1.5v rms so thats quite nice. I was just confused why I couldn't search by Vbe ON/Saturated voltages, but I understand why now. Cheers, have a great weekend all. Ed -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist