Setting individual inteensity of LED's with a MAX7119?

Development Boards Arduino
1

I have a project I’m doing for Halloween and want to individually vary the intensity of LED’s being controlled by a MAX7119. I know I can vary the intensity of ALL the LEDs at once, but I want to vary individual LEDs (I’m not using them in a matrix, I’m basically using the MAX to allow me to control 32 LED’s on 3 pins).

Would it be a possibility to just cycle them on/off in a PWM-like fashion fast enough to accomplish this? Can the MAX7119 handle that? Or would a duty cycle that high cause a problem?

2

Do you mean a MAX 7219 ?

http://www.sparkfun.com/products/9622

3

Yeah. Typo.

4

I don’t see a way to vary the intensity, LED to LED. Conceivably some circuit could be derived to vary the Iset current, synched to the 1’st LED. But that would be more complicated than just using an IC that has that capability.

http://www.maxim-ic.com/datasheet/index.mvp/id/4539

http://www.sparkfun.com/datasheets/Comp … lc5940.pdf

5

No circuit needed. You turn it on and off extremely fast.

6

InfernusDoleo:
No circuit needed. You turn it on and off extremely fast.

It ? As in the entire IC output ? How would that modulate the outputs on an LED to LED basis ? Can you explain some more ?