Arduino Color Organ

Forum 2005-2010 (read only) Hardware Development
1

I stumbled accross the website of talented hobbyist/engineer and am in need of some assisitance to understand the schematic for one of his projects.

I'm sure some of you have seen this website before:

http://www.microsyl.com/

click on the last link on the top, Kitchen Moodlighting

I'm interested in using the "Color Organ"aspect of his design to control a 4x4 matrix of ceiling mounted 3w RGB LED's. I'd like to run the 3 outputs of the color organ to the arduinos analog in, then utilize them to drive the designs and color patterns. However, I am having trouble understanding the schematic. On the left hand of the PDF file there are 4 floating elements, the start of each is marked VCC and continues down to a grounded capacitor. I understand what VCC means, just not where they should be connected on the circuit.

Any help or suggestions would be appreciated.

Thanks for your time! :slight_smile:

Schematic:

http://www.microsyl.com/moodlight/colororgan.pdf

2

These are decoupling capacitors and should be connected across the supply on the ICs.
C26 should be close to the supply input to the board and the others should be close to the op amp chips.

For an explanation of decoupling see:- De-coupling

3

Thanks!