EveryDay Practical Electronics have done this. The code can be downloaded from their FTP site. www.epemag.wimborne.co.uk email me off list if you need further information Colin -- cdb, bodgy1@optusnet.com.au on 11/06/2002 -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu