I have a simular need, however mine is DC. Want to be able to measure up to 100A DC at 12V via a PIC. I plan on using a 16F872 which has A2D, and can use like an op-amp to get it in range of the PIC's a2d if necessary. Anyone have suggestions on best way to do this? Accuracy of about .5A would be nice.. Thanks in advance, Tim -----Original Message----- From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Jinx Sent: Monday, June 17, 2002 11:39 PM To: PICLIST@MITVMA.MIT.EDU Subject: Re: [EE]: PIC High Current Meter > with the magnetic field may be needed. In some cases this means > adding a concentrator such as a block of iron, in other cases it > means stepping-down by a transformer such as a wound ferrite. That was a little ambiguous and/or generalised. It rather depends on the flux range of the sensor as to what is necessary to get the field strength optimised -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.