There's been a lot of discussion on the list about using ultrasonic transducers for measuring distance, well the Nov 98 issue of Everyday Practical Electronics had an article on doing so with a PIC16C84 and an LCD display. EPE is now available for purchase online at 'http://www.epemag.com', but the best news is that there is a free demo issue available for download, and by some lucky coincidence it's the Nov 98 issue. You can download either the entire magazine, or just the portions you want - well worth a look for the PIC article. -- Nigel. /--------------------------------------------------------------\ | Nigel Goodwin | Internet : nigelg@lpilsley.demon.co.uk | | Lower Pilsley | Web Page : http://www.lpilsley.demon.co.uk | | Chesterfield | Official site for Shin Ki Ju Jitsu | | England | | \--------------------------------------------------------------/