Nuts and Volts - January 2008

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%

10 or 20 turns

1/4W 5%

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