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Topic: My RGB LED Stairs Illumination video (Read 21 times) previous topic - next topic

tuxduino

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We've already established this.


Hmmm.... maybe I came in too late. Sorry.

dtokez

I would also be interested in how you mounted the LED's? Did you just use 1 RGB LED per step or more than one? I see that the TLC5940 can sink plenty of current so I'm considering using 2 or 3 per step.

Thanks!

funkyguy4000

You might want to check out the tlc5947.  More channels, easier to use.  Only hurdle is mounting it b/c it only comes in surface mount packages.
Accelerate to 88 miles per hour.

dtokez


You might want to check out the tlc5947.  More channels, easier to use.  Only hurdle is mounting it b/c it only comes in surface mount packages.


Wow just checked it out, 24 channels on one chip is pretty epic! SMD is not a problem for me to solder but I'm not sure if I could etch some PCB's with that pitch hmmm.

Do you think the standard TLC5940 library would need much tweeking?

funkyguy4000

#49
Apr 04, 2013, 06:18 am Last Edit: Apr 04, 2013, 06:19 am by funkyguy4000 Reason: 1
Sorry for my late response, I'm freaking out with my last non final test at university.

I haven't been able to get them mounted to exactly test them, although through research, It seems that you don't even really need a library for them.  They are basically just giant shift registers except instead of shifting on or off, you shift specific values between 0 - 1023 or w/e it calls for.  Then you just latch the values in and bam, you got purple or w/e is connected to the channels.

Only problem is that if you put a lot of chips in the daisy-chain line, then you may need a faster processor depending on how fast you want to update the values
Accelerate to 88 miles per hour.

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