Parts List for PIC color organ

Power supply:
1 120VAC to 12VAC 300ma AC transformer (Radio Shack 273-1385B)
1 1000uF 30Volt Electrolytic capacitor
1 1N4001 silicon rectifier diode
1 7805 5-volt switching regulator or equivalent
1 47uF tantalum cap

Main Circuit
1 general purpose PC-board (Radio Shack 276-168)
1 RCA jack for audio input
1 Dual op-amp (could be 1458) for input filtering/amp
4 100K ohm resistors for the op-amps
1 5K ohm resistor for op-amp
1 50K ohm potentiometer for gain control
10uf to couple the input 
1 PIC 16F873-20 microcontroller (could be 16F873A with code tweak)
1 20Mhz crystal to drive the PIC
2 22pf caps for the crystal
4 LEDs (10ma current) (red, yellow, blue, green) as indicators
4 380 ohm resistors to drive the LEDs

IC sockets:
 2 14-pin for the 28-pin PIC
 1 8-pin for the opamps
 1 18-pin for the opto-triacs

Output AC driver stage
3 180 ohm resistors
3 600V 8A Triac 5ma activation current in TO-220 case (Digikey 497-3387-5-ND)
3 600V ZC opto-Triac 6-pin DIP (Digikey 160-1722-5-ND) (MOC3063 equiv)

nice things:
100mil spaced posts to push on connectors
wires with two-hole push on connectors from old computer from panels
wire nuts to hold wires inside case together

All mounted inside six-outlet Trip-Lite line conditioner case with one dual
outlet removed for seeing the LEDs and the other two dual outlets having
a breakable tab to isolate top from bottom outlet for switching.

Note about the PIC: You can use a much smaller size PIC (14-pin) since there
 are very few used IOs.  Also the 16F873 may be out of production and replaced
 by the 16F873A, in which case you'll need to tweak the source code (see
 comment near the beginning) to get it to compile with MPLAB IDE.