"Peter L. Peres" wrote: > > Tony, a good rule of thumb is Rbe = Rb * 10. This assumes rail to rail > input drive. > > Peter Hi all, Just a short not to say thanks for the responses. This part of the project appears to work fine. -- Best regards Tony mICros http://www.bubblesoftonline.com mailto:sales@bubblesoftonline.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.