TLC5940 and Common Cathode RGB LEDs

Forum 2005-2010 (read only) Hardware Interfacing
1

I just ordered 150 common cathode RGBs, and realized that the TLC5940 requires common anodes. Am I completely screwed?

I cannot find a chip with similar capabilities that works for common cathode LEDs. :-[

2

Am I completely screwed?

Pretty much. :frowning:

You could use buffers to change the polarity but you will loose the current control the TLC5940 gives, and it is more wiring.

3

Looks like I got an extra 150 cathode common LEDs then! I have no idea what I am going to use these for.