Colorganic Spectralizer

Colorganic Spectralizer
Miniature color organ / audio spectrum analyzer. Assembled and tested; just add batteries.
Alternate View Illuminated Color Representation Frequency Indication Layout
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The Colorganic Spectralizer is an audio spectrum analyzer with seven bright 10 mm colored LEDs. Use it as a miniature color organ or just a flashy desktop display thingey. Each LED responds with a brightness that's in proportion to the sound level at a particular frequency. The Colorganic Spectralizer comes complete with an integrated microphone and runs for hundreds of hours on one set of AA batteries.


  • Entertainment or game system enhancement
  • Visual telephone ring indicator
  • Visual baby monitor
  • Video game enhancer
  • Visual aid for the deaf

This is the sturdiest version of the Colorganic Spectralizer. Although not recommended, it can usually take a drop from 4' onto concrete without significant damage.

This is a hackable gadget! The design files are published here (see the Resoruces section below), and you can modify the source code and reprogram the device. There's even a Bar Graph LED modification that you can build and add on to make your Colorganic Spectralizer look like a graphic equializer display.


  • Frequency Response: 40 Hz - 20 KHz in Seven Bands: 63 Hz, 160 Hz, 400 Hz, 1 KHz, 2.5 KHz, 6.25 KHz, 16 KHz
  • Input: Integrated omnidirectional microphone, optional direct connection
  • Display: Seven (7) 10 mm color LEDs (red, green, blue, white, yellow, orange)
  • Power Requirement: (3) AA Batteries (not included)
  • Dimensions: 2.5"(64mm) x 1.9"(48mm) x 1.5"(39mm)
  • Weight: 1.2 oz (34g) without batteries


Operation Manual:  download (PDF)
Assembly Manual:  download (PDF)
Electrical Diagram:  download (PDF)
Source Code Listing:  download (TXT)
Source Project Folder:  download (ZIP)
Previous Version Archive:  download (ZIP)

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