Arduino Mega2560 + Sparkfun TLC5940 LED Driver Not Working

Projects General Guidance
1

Hello. I am trying to control the RGB Channels of my LEDs using the Sparkfun TLC5940 breakout board and Arduino Mega2560.

I am following the exact setup below except I do not have Servos connected. Only LEDs:

image
image1725×1028 312 KB

I am using the SparkFun TLC5940 Library. (I also tried Tlc5940 but no luck)

My code is super simple. Just trying to turn the LED connected to channel 0 on but I am not seeing anything.

#include "Arduino_Mega.h"
#include "SparkFun_Tlc5940.h"

void setup()
{
  Tlc.init();
}
void loop()
{
    Tlc.set(0, 4095); 
    Tlc.update();
}

Has anyone had any luck with this LED driver? Did you do anything to the code to make it work? Mind sharing code snippets?

Thanks

2

How are these LEDs and their associated resistors wired.
This is the data sheet:-
TLC5940 LED PWM Driver.pdf (932.4 KB)

If you look at page 8 you will see that the output can behave in a few different ways. This will determine how you have to wire up your LEDs and resistors.

This is a rather old chip, almost obsolete now.

Your wiring diagram shows no other connections you need to drive this chip.

I am sure you are missing other stuff like setting which output configuration to use.

3

@sketsamanian ,

Your topic was moved to its current location as it is more suitable.

Could you also take a few moments to Learn How To Use The Forum.

It will help you get the best out of the forum in the future.

Thank you

4

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