Android Bluetooth RGB controller LED strip

Using the device, you can remotely android control RGB LED strip (or RGB LEDs) via any Android device with an integrated Bluetooth module.
A distinctive feature of this project is the simplicity of the hardware and software part of the system, which includes a Bluetooth controller, a portable Android device with an installed application (smartphone, tablet) that functions as a remote control.
The Bluetooth controller is a compact device consisting of an Atmel ATmega8 AVR microcontroller (MC), a miniature HC-05 Bluetooth module, N-channel power MOSFET switches, integrated voltage regulators, status LEDs, and several passive elements.

Main characteristics of the system:

easy and sufficiently informative graphical user interface;
displaying the MAC address of the connected Bluetooth controller;
possibility of manual setting of MAC-address;
service messages about errors of connection with the Bluetooth controller;
buttons for quick selection of the color;
possibility of manual setting of colors;
information about the connection status;
the possibility of increasing the functionality (you will need to upgrade the microcontroller program).
hardware (Bluetooth controller):affordable, cheap and easy to use Bluetooth module HC-05;
implemented on MK 3 channels of 8-bit PWM for LED control;
N-channel MOSFETs in a case for surface mounting are used as power switches;
autonomous work - no need for constant communication via Bluetooth with an Android device;
communication range 10-15 m;
supply voltage 12 V;
current consumption of the Bluetooth controller (without LED strip): - Bluetooth module in the search mode: 55 ... 60 mA;
with an established connection with an Android device and no commands: 22 ... 27 mA;
reception and processing of the command: 38 ... 42 mA;
two LEDs to indicate the operating mode of the Bluetooth controller;
the ability to implement 10-bit PWM control;
the ability to implement control of various lighting effects;
simple application for an Android device: the HC-05 Bluetooth module connects to the ATmega8 via the UART interface (ports PD0 / RXD and PD1 / RXD). Two LEDs D1 and D2 inform the user about the current operating mode of the Bluetooth module (search, connection establishment, AT command mode).