Luís Carlos

Frequency Analyzer Matrix

My colleagues and friends from the Electrical and Electronic Engineering course (Daniel Martins, João Silva and João Pereira) made a giant array of LEDs for the academic week. To make the matrix more interesting, I was asked for a card that could capture the ambient sound. So I designed a PCB with a microphone, an automatic gain amplifier and a spectral sound analyzer capable of analyzing in 7 frequency bands.