INTRODUCTION:
This project is a modular amplifier based on LM3886 50W monolithic amplifier from National Semiconductor configured as non-inverting amplifier. The preamplifier and tone control module is based on TDA7313 digital controlled preamplifier via I2C with PIC16F88.
Click here to download the Project design files , hex files and PDFs
THE AMPLIFIER MODULE:
The circuit is based on Jim George Six Channel Mixer and Amplifier configured as non inverting amplifier with a gain of 23.
TONE CONTROL MODULE:
The TDA7313 schematic is based on the datasheet, with the addition of a 7809 regulator. I added the regulator since the other modules are working on different voltage level so any accidental voltage input will not destroy the unit.
CONTROLLER MODULE:
The Microcontroller is a PIC16F88 using internal oscillator, with 3 buttons for menu and navigation and a 2×16 LCD for display, like the other module, an on-board regulator is on board.
ACTUAL MODULES:
LM3886 Amplifier Modules
TDA7313 Tone Control
Microcontroller, LCD and Buttons