Beat Detector

Background

Spring 2019

Built as the final project for my ELEN 3083 Electronic Circuits Lab at school, I built the following circuit which detects beats in an audio input.

Objective

Intended as an exercise to build off of for a future project, I decided to build a circuit that would take in an audio input, modify it and feed the modified signal to two LEDs. The first LED would light up when a beat occurs in the bass line of the input. Likewise, the second LED would light up when a beat occurs in the melody of the input.

Circuit Design:

Circuit Diagram:

Output Signal passed through LED from low-pass filtered signal with beats detected

Output Signal passed through LED from high-pass filtered signal with beats detected

Demo with green LED following bass and yellow LED following melody

© 2019 all rights reserved Mohar Kalra.