
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!