amplifier with the microcontroller

Pre-amplifier with the microcontroller running

In magazines and on the Internet, there are similar projects to completion, but they PIC microcontrollers or other.Unfortunately I do not know them, but I wanted to create a microcontroller ATMEL. Reading articles in journals, documents, and walking on various forums ubedeli me that is not so difficult to do something like that. And this design was born here

The sound piece is known and available to the chip TDA7313, wiring diagram for Datasheet-in control unit designed for microcontroller ATMega8535. Can be applied to almost anyone, just that I had, would be enough ports to connect the LCD and buttons of my 9 pcs. 1 - Select channel 1 2 - Select Channel 2 3 - Select channel 3 4 - Select the previous menu item (LEFT) 5 - Select the next menu item (RIGHT) 6 - Increasing the (UP) 7 - Decreasing the parameter (DOWN)8 - Vklichenie / Mute (MUTE) 9 - Vklichenie / Off Loudness (LOUDNES) FUSE for microcontroller (PonyProg) 

Also, the device can be controlled via IR remote control. This equipment must operate on standard RC-5. I used this here

to use another remote podkorektirovat should address the control and key codes in files and rc5.c audioproc.c and perekompelit project. As the compiler I used WinAVR assembly in 2006.

To determine the key codes you can use the RCexplorer () power supply without any special executed in two stabilizers 7809 and 7805 to supply the sound processor and the digital part when you press the LEFT or RIGHT dimensioned onto the parameter to control (Volume -> Gain -> Bass -> Treble -> Balance Fronts -> Balance of Logistics . UP DOWN buttons increase or decrease the setting meets both. buttons on the panel in there that allow you to adjust the Gain, Bass, Treble independently in whatever mode is not on your device. When you press the INPUT 1, INPUT 2, INPUT 3 meets both selected channel. When This included meets both LED indication of the selected channel. With MUTE buttons and LOUDNES in my clear. indication LED is present and mode MUTE, and the indication "Loudness" is displayed in the top left corner of the LCD display - displays the symbol "L" and of course you can also enter Indication LED (ports lack. device is assembled on four printed circuit boards. This LCD board with a microcontroller, audio processor, the board buttons and display power supply. could certainly do everything in one of the two, but I was so convenient. All drawings, diagrams , drawings, printed circuit boards, firmware and source code are located in the archives of the project. Ibid, and a list of used bits and pieces. boards in the format of SprintLayout 5.0, as well as in the form of drawings jpg, missing links are made ​​wire MGTF. 

Now a few photos of the project

In the background is seen a poster amp AC on it, I had all sorts of UMZCH with this device have been tested on the circuit chips such as the TDA2005, TDA2030, TDA2050, LM1875, TDA7294, and many others. 

This design has a great potential to further increase the functionality (good enough ports). Such as temperature control inside the radiator and the inclusion of the fan to cool off, etc. Other photos are located in the images of the project in the project archive drawings, photographs of work in different modes, diagrams, drawings, printed circuit boards, firmware and source code, a list of used bits and pieces. 

Files: 
Archive Project (1.3MB)