This instructable is on a sound activated RGB Led Matrix made from RGB Led's and house hold items. The LED Matrix uses three 4-bit Binary Counters and one 4-bit Shift register (for the ground leads on the RGB LED's) to make the lights go in a jumbled hi - low mixed up count for cool effect.
I have a lot of the parts lying around so this build was very cheep. I spent about 15 - 20 bucks on a 100 count of RGB LED's I got from Ebay. and about 10 to 15 on the circuit board and IC's at Fry's Electronics in AZ. I used my Arduino as a 5V Power supply you could use a USB cable instead of the Arduino also an old PC Power Supply will work even better.
** QTY: 28 RGB LED's (from Ebay came with Resistors)
** QTY: 3 74LS193 (from Fry's Electronics)
** QTY: 1 74195 4-bit Shift Register (from Fry's Electronics)
** QTY: 1 Cardboard Box To Cut up
** QTY: 1 10FT RJ45 Cable to be striped for wire's (had lying around but you can get it any were since its to be striped go to local Good Will or yard sale supper cheep and maybe free)
** QTY: 20pk HOT Glue Sticks (Home Depo)
** QTY: 1pk solder (Fry's Electronics)
** BOX CUTER
** Soldering Iron
** Hot glue gun
** Wire strippers
** BIC PEN