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.

Here is another old video I shot demonstrating optical sensors and hall effect sensors using a picaxe microcontroller.

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