FIGURE 6. Color organ
output schematic.
ITEM
• C1,C4,C5,C6,C8
• C2,C13,C15
• C3
• C7
• C9
• C10
• C11
• C12,C14,C16
• R1
• R2,R6-R8,R13,R14
• R3,R4,R9,R10
• R5
• R11,R12
• R15
• R16,R18,R20,R22
• R17
• R19
• R21,R23
• D1
COLOR ORGAN PARTS LIST
DESCRIPTION NOTES
4. 7 μF capacitor
0.1 μF capacitor
230 pf capacitor
0.022 μF capacitor
0.01 μF capacitor
0.02 μF capacitor
0.04 μF capacitor
47 μF capacitor
4.7K resistor
1K resistor
20K resistor
1 meg trimmer
1.6K resistor
270 ohm resistor
470 ohm resistor
22 ohm resistor
18 ohm resistor
6. 8 ohm resistor
1N5819 diode
CONTACT THE
AUTHOR
Craig A. Lindley can be
contacted via email at
calhjh@gmail.com
Polarized
1/4W 5%
1/4W 5%
1/4W 5%
10 or 20 turns
1/4W 5%
1/4W 5%
1/4W 5%
1W
1W
1W
Optional reverse voltage
protection diode
Blue LEDs RL5-B4630
Red LEDs RL5-R5015
Yellow LEDs RL5-Y5030
Green LEDs RL5-G5023
Stereo 3. 5 mm/1/8” jax Line input connector
Two wire power jax Optional
Inter-board connections Optional
Condenser microphone Jameco #160979
2N4921 switching/power Heatsinks aren’t necessary
transistor
SPDT
SPST
LM2940CT
LM3940IT
MSP430-F2012
RESOURCES
The color organ source code
file — colororgan.s43 — is
available from the Nuts &
Volts website at
www.nutsvolts.com.
• D2,D33-D42
• D3-D12
• D13-D22
• D23-D32
• J1
• J2
• J3/J4
• M1
• Q1-Q4
Information on the Texas
Instruments eZ430
development kit is
available at
http://focus.ti.com/docs/
toolsw/folders/print/
ez430-f2013.html.
• SW1
• SW2
• U2
• U3
• U4
• U1
• U5
• U6
LM324
74HCT139
74HCT04
Mic/line switch
Power off/on switch
Five volt, one amp voltage regulator
3. 3 volt, one amp voltage regulator
uC target board. Available from TI.
(See Resource sidebar.)
Quad op-amp
Two to four demultiplexer
Hex inverter/buffer
The LEDs used in this project
were purchased from
www.superbrightleds.com.
Other parts for this project
were purchased at Jameco
and RadioShack.
58
January 2008