Google, google, google.I think he doesn't know from where to start. That's why I picked up one of Mr. @AlbertHall circuits suggestions and tried to make it work. But then Mr. @bertus said that that circuit was not what the OP was looking for! So I waited for some reply from Mr. @AlbertHall. But nothing so far!
Even just using the TITLE to googled still can be found much more informations to study before post, so I don't think that is the reason, I think you will do the search right?