To Craig - A different door lock seen on instructables

General
1

http://www.instructables.com/id/Secret-Knock-Detecting-Door-Lock/

Check out his video.

Jim

2

Ok. Sold. I’m up for making a few of these.

3

I have a piezo electric buzzer which I think we could use in this project (at least I bought it with something like this in mind)

4

I also think I might have some motors powerful enough