As seen in our August 2011 issue of Nuts & Volts Magazine. Read the article at the link below!
Build a Miniature Color Organ by Ron NewtonThe project is a light organ that displays when it picks up a sound. It is only one inch square, has eight LEDs, and runs off of a 12.5 mm 1025 Lithium battery (not included).
It can be used by bands in marching parades, football games, or even be placed on speakers. It is best for flashing at night, or it can be used on the bandstand to draw attention to the drummer.
A Partial Kit is Available: Color Organ PCB & Programmed Chip