PicDude wrote: > I need to measure DC current up to 100A (at 12V) at multiple points and > planning to use the ZXCT1010 current monitor and a sense resistor for > this. A drop of 100mV or even a bit more is acceptable; few percent > error/accuracy preferred. At that current there will be a reasonable magnetic field around the wire. How about a "clip on" type ferrite with embedded hall effect sensor? This won't cause any additional voltage drop and therefore extra power dissipation, and it is automatically DC isolated so you don't have to worry about what voltage it is floating at. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist