644/1284 Narrow

by Pandauino

The smallest ATmega644/1284-based boards

View all updates Jul 06, 2020

Instructables tutorial for making a 1024 samples spectrum analyzer

by Thierry GUENNOU

Hi,

I hope everyone is safe in this very strange situation we are dealing with.

I have been working lately on the "644/1284 Narrow" project, and also a project for a teacher who would like to show his students how to compute the speed of a bike by analyzing the sound of a probe rubbing on the side of the tire. Since the tire rubber has 2400 little grooves it creates a sound proportional to the speed. I am still working on it and having some difficulties with my old tire… I hope he will be equipped with a brand new one!

For this reason I was focused on an fast Fourier transform (FFT). This computation requires as much RAM as possible, so it constitutes a good example of a memory intensive application. Since the 1284 Narrow board has 16 KB of RAM, I tested the algorithm on it, and it is working perfectly well. From this I decided to publish this Instructables tutorial.

I hope you will be interested, and let me know if you have some comments.

About the Author

Thierry GUENNOU


$1,161 raised

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Product Choices

$29

644 Narrow Board

One 644 Narrow board - with 64 Kb flash and 4 Kb RAM. Comes with one 0.5 m USB cable.


$75

Three 644 Narrow Boards

Three 644 Narrow boards - with 64 Kb flash and 4 Kb RAM. Comes with three 0.5 m USB cables.


$35

1284 Narrow Board

One 1284 Narrow boards - with 128 Kb flash and 16 Kb RAM. Comes with one 0.5 m USB cable.


$93

Three 1284 Narrow Boards

Three 1284 Narrow boards - with 128 Kb flash and 16 Kb RAM. Comes with three 0.5 m USB cables.

Credits

Pandauino

I have been interested by electronics as a hobby for a couple of years and wanted to go as far as possible in the development of a finished product.


Thierry GUENNOU

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