File:DIY Arduino LED screen for audio spectrum analyzer 2.jpg

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file ‎(5,168 × 3,446 pixels, file size: 3.45 MB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents

Summary[edit]

Description
English: A DIY Arduino-based 24x24 LED screen for an audio spectrum analyzer. This is only the display board, the signal processing will be handled by a different one. Yes, I know, the Chinese sell the complete package for under $25. But these usually have limited bandwidth (while my principal interest is in the 10k-20k octave), and fixed bands (while I need at least third-octave resolution). They rely on crude FFT over a limited-bandwith sample stream, but don't have anywhere near the speed to process it. With all-analog filtering - speed is unimportant.
The LEDs are monochrome 'yellow' (actually orange), but may look like different colors depending on intensity.
Русский: Самодельная плата анализатора спектра звукового сигнала на матрицах Kingbright и Arduino Mega. Arduino заведует только сглаживанием отображаемых показателей и собственно развёрткой матрицы (динамической индикацией); выделение частотных полос и детектирование производятся традиционными аналоговыми схемами на ОУ. Менее громоздкие альтернативы либо слишком медленны (использование встроенного ЦАП + БПФ), либо имеют слишком широкие полосы (использование редких специализированных микросхем) - а задача требовала узких, четвертьоктавных полос в верхней октаве ЗЧ.
Date
Source Own work
Author Retired electrician

Licensing[edit]

I, the copyright holder of this work, hereby publish it under the following license:
Creative Commons CC-Zero This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication.
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current21:23, 26 January 2020Thumbnail for version as of 21:23, 26 January 20205,168 × 3,446 (3.45 MB)Retired electrician (talk | contribs){{Information |Description={{en|A DIY Arduino-based 24x24 LED screen for an audio spectrum analyzer. This is only the display board, the signal processing will be handled by a different one. Yes, I know, the Chinese sell the complete package for under $25. But these usually have limited bandwidth (while my principal interest is in the 10k-20k octave), and fixed bands (while I need at least third-octave resolution). They rely on crude FFT over a limited-bandwith sample stream, but don't have a...

You cannot overwrite this file.

There are no pages that use this file.

Metadata

This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:DIY_Arduino_LED_screen_for_audio_spectrum_analyzer_2.jpg&oldid=873540223"