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VolMatrix

Audio control module with 16x8 led matrix output

Project overview

VolMatrix is a simple audio control module supporting various audio processors with I²C interface. It uses two 8x8 LED matrixes as a display. There is a current time displayed in standby mode. Any RC5/RC6/NEC/Samsung remote control can be used.

Main features:

Schematic

Schematic

Remote control

To enter learn mode standby device and press 1 and 2 hardware buttons simultaneously for 2 seconds. You will see RC code and index number for first function - STANDBY. If you press button on remote control you’ll see RC code changes. To save this code, press 3rd hardware button. Device will move to second, MUTE, function. After finishing learingn all functions press 1 and 2 buttons again to exit learn mode. Function index numbers are enumerated in sources.

Supported audio processors:

Audioprocessor Feature set
TDA7439 4 stereo inputs, bass, middle, treble
TDA7312 4 stereo inputs, bass, treble
TDA7313/PT2313 3 stereo inputs, bass, treble, fade, loudness
TDA7314 Stereo input, bass, treble, fade, loudness
TDA7315 Stereo input, bass, treble
TDA7318 4 stereo inputs, bass, treble, fade
PT2314 4 stereo inputs, bass, treble, loudness
TDA7448 6-ch input, fade, center, subwoofer
PT2323/PT2322 4 stereo inputs, 5.1 input, bass, treble, fade, center, subwoofer, surround, 3d
TEA6300 3 stereo inputs, bass, treble, fade
TEA6330 Stereo input, bass, treble, fade

Useful links: