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You can use any music you like to get the effect going, but we found that

music with lots of instruments — like a swing band with lots of brass —

works best. Also, music with an upbeat tempo moves along and gets the

lights switching on and off faster, which makes the effect better. Our favorite

number for dance to the music? Ella Fitzgerald singing Take the A Train,by

Billy Strayhorn. (Ask your parents; they might have heard of it.)

Here are the simple steps to get this project going:

1. Pop the batteries into the battery pack.


2. Flip the on/off switch to on.

10

11

15

16

6

1

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8

9

14

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3

2

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4

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Figure 5-24:

LEDs,

battery

pack, and

on/off

switch

connected

to the

breadboard.

112 Part II: Sounding Off!