TLC5940 Current limit each pin?

Other Hardware LEDs and Multiplexing
1

I just got a few TLC5940's to play around with, and I have one working right now, but how do I set the current limiter on a per-pin basis?? I have an RGB led and I would like the red pin to have more current (or the blue and green pins less current) to get the brightness of all three colors to be the same... I think you use the DCPRG and VPRG pins on the Tlc5940 but I'm not sure exactlly how to do it...

UPDATE: ok so after a lot more reading, it seems you use Dot Correction to set the current for each pin. BUT, so far all I've found is a command Tlc.setAllDC() which sets all the pins to the same.

2

Luckily you have the source code of Tlc.setAllDC() available to look at.

3

Care to disclose exactly which library you are using? Does help to know these details

4

MarkT:
Care to disclose exactly which library you are using? Does help to know these details

Sorry about that! I'm using the library from Google Code Archive - Long-term storage for Google Code Project Hosting.
Specifically the r014_2 library.

5

FIGUED IT OUT!! Scroll down to the 3rd to last post in this forum link for a working code example from the creator of the library! Redirecting to Google Groups

6

Yes, the library as it stands doesn't have support for setting the values differently
per LED, but you can always adapt it (and suggest the additions back to the original
author). The thread you found seems to cover the issues.