Friends, I am thinking of using a PIC16C672 to interface to a TI-85. The PIC will basically be the sending data to the calculator. Probably some type of temp ckt. using the A/D on the PIC and having the results graphed. I was just wondering if anybody has any advice on the 12C672 part. Any thing to watch out for? Thanks in advance! Best regards, Steven Steven Kosmerchock Engineering Technician/Student CELWAVE Phoenix Arizona USA Email: steve.kosmerchock@celwave.com www.geocities.com/researchtriangle/lab/6584