Let's take a closer look at the belt

First, look at the list of materials on this post.




Then, take off the switch and tie up both black and red wire together with tape.




additional materials:
1) a clear plastic container
I'd been looking for this kind of thing everywhere (Wal-Mart/Home Depot/Office Depot/Office Max/Bed, Bath & beyond/Linen&Things/ Kohls etc.) Finally, I got it from HobbyLobby for $0.77!
2) a magnet clip from Office Depot for $1.99
3) double-sided tape



Put the Infrared light with a AA battery in the box and clip it on the belt.



Done!

Next time, I will talk about how we can calibrate the screen with this belt!