This project is from Ron Newton's article, "Build a Miniature Color Organ" in the August 2011 issue Nuts & Volts.
The 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.
1 - PCB
1 - Programmed MCU
1 - Battery Holder
1 - 20K Pot
1 - 100K Resistor
1 - Microphone
2 - Yellow LED
2 - Blue LED
2 - Green LED
2 - Red LED
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