I recommend you get rid of your cat then before she starts getting expensive. Simpler solution. Adios, LarZ --------------- TAMA - The Strongest Name in Drums --------------- -----Original Message----- From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Mark Willis Sent: Friday, 27 November 1998 10:09 To: PICLIST@MITVMA.MIT.EDU Subject: Best chip for a "Kitty Scarer" application Hi, all; I need to make a "kitty scarer" that detects when one cat of mine (Kzinnrrhett the stubborn silver tabby) jumps up onto one bookshelf that she's decided is HER rest stop.