3E20.30 - The Sound Color Organ

Code Number:
Demo Title:
The Sound Color Organ
High Pass, Low Pass Filter
Area of Study:
Christmas Lights and Sound Color Organ Kit.

See also 3E20.35 in Oscillations and Acoustics and 5L30.36 in Electricity and Magnetism.

Plug the Christmas lights into the organ kit.  Up to 200 watts total may be plugged into this kit.  Play some music out of a tape deck and the lights should flash to the sound of the low frequency drums or beat.

  • Erik Zavrel and Eric Sharpsteen, "Introducing Filters and Amplifiers Using a Two-Channel Light Organ", TPT, Vol. 53, #8, Nov. 2015, p. 478.
  • "W-405. Color Organ - Hallbar", DICK and RAE Physics Demo Notebook, 1993.
  • Forrest M. Mims III, "Mini-Color Organ", Vol. I - Timer, Op Amp, & Optoelectronic Circuits & Projects, p. 76.

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