alan smith wrote: > And, as far as something plugged in and not on...not the case. Whenever > a device is plugged in, it will be on, yet may not be pulling very much > current. I think for anything to make sense, you need to specify the minimum current you want to sense and the maximum current that may flow through the wire. The possible solutions depend a lot on these two parameters. Gerhard -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist