![]() ![]() ![]() The Firmware for the AVR microcontroller is written in C. I received the PCB 6 days after placing order on their website. Total cost was 44$ including shipping to France by DHL for 5 pieces. This board runs on 5V DC power and should not exceed 500mA of current draw (All LEDs lit up).Ī stabilized power supply is needed in order to provide clean power to the analog circuit. 74HC595 shift-registers for extended MCU outputs.The hardware is based on 3 main components: Each audio channel will be completely separated and computed separately by the AVR microcontroller on each PCB. That way you can build a stereo VU-meter just by using two instances of this circuit (which can be mechanically stacked together). Each PCB holds all the LEDs, the analog and digital segments of the circuit and only handle one audio channel. It's display consists of 80 LEDs per audio channel. This project is an AVR based LED VU-meter. ![]()
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