October 3, 2013 AT 2:25 pm
Make a cat “purr” detector – FFT: Fun with Fourier Transforms @ The Adafruit Learning System
Make a cat “purr” detector – FFT: Fun with Fourier Transforms @ The Adafruit Learning System.
Have you ever wanted to build devices that react to audio, but have been unsure about or even intimidated by analyzing signals? Don’t worry! This guide is an overview of applying the Fourier transform, a fundamental tool for signal processing, to analyze signals like audio. I’ll show you how I built an audio spectrum analyzer, detected a sequence of tones, and even attempted to detect a cat purr–all with a simple microcontroller, microphone, and some knowledge of the Fourier transform.
Continue on to learn some background information about the Fourier transform.
Check out all the Circuit Playground Episodes! Our new kid’s show and subscribe!
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — Transforming Today’s Bad Jobs into Tomorrow’s Good Jobs
Wearables — Snap a picture
Electronics — To Y5V or not to Y5V?
Biohacking — Ticks are Spreading an Allergy to Meat
No Comments
No comments yet.
Sorry, the comment form is closed at this time.