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Collin Cunningham’s awesome videos are always great to watch. This time, Collin shows how to build a Color Organ, which is a light display that responds to sounds around it, allowing you to build cool visualizer effects to go with your tunes.

Long before the dawn of digital music, folks employed the power of the electric color organ (aka “light organ”) to add some synced visuals to their hi-fi experience. Schematics for building such a beast based on AC power and incandescent bulbs can be be found fairly easily on the web, but plans for comparable LED-based designs seem a bit harder to come by.

Adapted from Aaron Cake’s 3 Channel Spectrum Analyzer, I built my own analog LED Color Organ to enhance the aural experience. The circuit uses 4 operational amplifiers plus ultra-bright 5mm LEDs to respond visually for bass, mid, and treble frequencies.

John Baichtal

My interests include writing, electronics, RPGs, scifi, hackers & hackerspaces, 3D printing, building sets & toys. @johnbaichtal



  1. NIce project! Adding this to my wish list.

  2. Rumpel says:

    I’ve always been fascinated by these gadgets. Did you know that in Germany’s 70s every decent party cellar had to have one of those “light organs”? They were directly connected to one speaker line and mainly consisted of filters, transformers (to de-couple the speaker line and produce about 80V switch voltage), diacs and triacs.
    As a hommage I built an iOS app; Have a look at it at .

    1. Robert says:

      Brilliant. Only Germany could have “party cellars”.