hi doc
many thanks on your input really appreciate it, for my purpose im really not looking for very accurate current readings, all im interested in is if the current falls below the pre-set level then i loose my low input then alarm,
im going to knock up a board in the next couple of days puts some loads on it and have a play.
could you please expain a bit more on what you mean by "output ground reference" i dont quite understand that
thank you