Weekend Project: Evasive Beeping Thing (PDF)

Annoy your friend or co-worker with this high-tech practical joke.
Thanks go to Brad Graham and Kathy McGowan for the original article in MAKE, Volume 14.
View the PDF of this project. and then subscribe to MAKE Magazine for other great projects
you can do over the weekend.

Here is a link for the corrected schematic.
Use it rather than the schematic in the PDF or article.