Throw away those complicated, expensive DVMs! http://www.thinkgeek.com/stuff/41/lebedev.shtml Keith -- Keith Lofstrom keithl at keithl.com Voice (503)-520-1993 KLIC --- Keith Lofstrom Integrated Circuits --- "Your Ideas in Silicon" Design Contracting in Bipolar and CMOS - Analog, Digital, and Scan ICs