Andrew Errington wrote: >Cool! What sort of results were you getting? I know it's a non-linear >response, but did the sensor behave as expected? > > Pretty much. around half a volt at 20 cm or so, rising to over 2v at close range millivolts when nothing detected. It didn't seem to matter much what angle i held the piece of card at either, it still got detected. I think they're going to work VERY well.