New 4 Note Laser Harp

This is a new prototype of my laser harp. I let the beams shine through a colloid.

Laser Harp Video

Laser Harp With 3 "strings"

This is my laser harp. Just a prototype of a prototype.

Video will be added soon.

Laser Trip Wire With Speakers

The same thing but now when the laser is broken, an alarm goes off. 

Laser Trip Wire

So I made a laser trip wire for the Arduino.
I got the idea today since I went to the 99 Cents store and picked up 3 lasers.

Here are the pictures. When the laser sight is broken the LED turns on.