RGB LED Shield Kit

This Arduino-compatible shield uses three TI TLC5940 PWM LED driver ships to drive a 4x4 array of RGB LEDs. Each color is controlled by a different chip so you can adjust the reference resistors for the appropriate current. This also includes mounting positions for for three general-purpose buttons that are connected to ground, and a reset button. The TLC5940 chips are not directly connected to any Arduino pins, but a header is provided for you to make a manual connection depending on the needs of your sketch.

Model: OSK101E1P

This board is a version of the circuit used at the first HTINK workshop on March 14th, 2009 at Bug Labs in New York City.

The best library I've seen for interfacing with the TLC5940 chips used in this shield is the tlc5940arduino library. We used it in the HTINK class and it performed very well.

On the shield, the four LEDs at the corners are labeled with their X,Y coordinates: "1,1", "1,4", "4,1", and "4,4". The formula to turn a coordinate into a LED number is (X - 1 + (Y - 1) * 4).


Application Ideas


The warnings and wrong operations possible cause dangerous.


This version has some major changes from the original 1.1 board.

RGB_LED_Shield_1.4.zip - includes schematic, board image, and design files for Eagle CAD.


May include key specification and other specifications.

Pin definition and Rating

Mechanic Dimensions


Hardware Installation

Assembled View


Includes important code snippet. Demo code like :

Demo code


The projects and application examples.

Bill of Materials (BOM) /parts list


Please list your question here:


If you have questions or other better design ideas, you can go to our forum or wish to discuss.

Version Tracker

Revision Descriptions Release
v1.4 the revise version Jul 08, 2009

Bug Tracker

Bug Tracker is the place you can publish any bugs you think you might have found during use. Please write down what you have to say, your answers will help us improve our products.

Additional Idea

The Additional Idea is the place to write your project ideas about this product, or other usages you've found. Or you can write them on Projects page.


How to buy

Click here to buy: http://www.seeedstudio.com/depot/rgb-led-shield-v14-kit-p-430.html?cPath=132_134.

See Also

Other related products and resources.


HTINK RGB Shield 1.4 by Ben Combee is licensed under the Creative Commons Attribution-ShareAlike License 3.0 Source code and libraries are licensed under GPL/LGPL, see source code files for details.

External Links

Links to external webpages which provide more application ideas, documents/datasheet or software libraries

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