Mark Willis wrote:
>
> 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
 Simpler solutions?
>
>   Mark, mwillis@nwlink.com

JC Whitney still sells Model T ignition coils ... :)
Maybe an IR sensor and a blower?

Regard, Jack