I prepared a document in Adobe Acrobat PDF format for Andy Kunz in response to his request for info on measuring high currents. He found it useful and suggested that I place it on my web site. So I have placed it there for those who are interested. The circuit can be easily modified to measure almost any desired current. The PDF document includes a schematic diagram so you don't have to put up with any disgusting ascii art. The PDF file is available at my web site: http://redrival.com/mcgahee If you find it useful, please drop me a short e-mail at tom_mcgahee@sigmais.com The feedback is useful in determining what sort of stuff is worth my while documenting and placing on my site. Fr. Tom McGahee