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Topic: TLC5940NT (Read 2066 times) previous topic - next topic


I have recently done a fair amount of reading on the TLC5940NT chip but still have a few questions I am hoping someone here can clarify.  Lets say I have purchased 12 individual RGB leds and I wish to control them with the TLC5940NT.  I understand i can use this to turn off/on the individual leds as well as use PWM but will the TLC5940NT allow me to change the color of the the individual LEDS?  Essentially I wish to build a LED matrix similar to the sparkfun 8x8 matrix with SPI backpack in terms of function but without the unit being so compact ( the matrix will not be arranged in a linear fashion).  If this is a total noob question I apologize as I am very new to this still.
Many thanks.


yes and no ;0)

You will be able to control the color of each LED, but you will have to provide 3 TLCs to do so, as RGB LEDs are normally using 3 pins for the colors and one as common anode/cathode. So, to control 12 RGB Leds you will have to have 36 Pins which makes 3 TLC5940s, which is thanks to the daisy-chain feature and the brilliant library here no problem.
Believe me, Mike, I calculated the odds of this succeeding against the odds I was doing something incredibly stupid[ch8230] and I went ahead


I see, thank you, for the clarification.


If you want to control up to 16 RGB LEDs using only 1 TLC5940 chip you can do it through multiplexing. Here is what I did:- http://www.thebox.myzen.co.uk/Hardware/Mini_Monome.html


You may also want to look at the tlc5947.


Thanks again for the helpful information.  Just what I was looking for.

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