Hi; Can anyone please help me with code for the above. I am after a well-documented example so that I can understand wahts going on. TIA ********************************************************* Ken Parkyn email: K.Parkyn@sct.gu.edu.au Electronics Workshop phone: (07) 3875 7289 Home: phone: (07) 3841 5135 Division of Science and Technology fax: (07) 3875 7656 Griffith University Nathan QLD 4111 Australia Office: Science 2 Room -1.17 *********************************************************