I just started playing with HC-05 Bluetooth modules and below are some short videos of projects I built. The first video is a direct copy of a tutorial by Dejan Nedelkovski which using a single potentiometer to control a servo. The second video I modify the project to use 3 potentiometers to control an RGB LED. The 3rd video I use a smartphone to control the RGB LED.
As I am just starting to put my website together these videos are just placeholders until I compile complete projects with source codes (Visual Basic, Android, Arduino, Picaxe), schematics, parts lists and tips etc.