Re: RGB SMT LED Cube, resistors, drivers, and shift registers.

Hippynerd:

Hello,

I'm thinking to use this on my setup. But instead of 1 LED I want to use a 50cm LED RGB SMD5050 LED strip. 9 strips.

Do I need then also the resistances and the blue thing above the TLC's? The power I will use not from the Arduino but from a 12V PSU (50A available).

I did search on this forum but couldn't found any directly answer on my question.

Kind Regards, Dave

Do I need then also the resistances and the blue thing above the TLC's?

What TLCs (no ' needed they don't own anything), those are shift registers.

And no you don't need to just alter the resistance you need to add a FET driver to each output, and don't resurrect an old thread start your own.

Hello Grumpy,

I mean above the TLC5940 you have the blue thing. I cant find the specs of it. And which FET driver do I need?

I'm sorry, I will start a next topic. I thought its useless to start a new one, if someone has a similar topic.

I mean above the TLC5940 you have the blue thing.

Let me try again. There is no TLC5940 in the diagram.
The blue things are 0.1uF ceramic decoupling capacitors.

And which FET driver do I need?

No you need a FET to drive it. Any logic level FET will do.

I thought its useless to start a new one,

You were wrong.
And this thread is not at all like the one you need, it looks like you want to use a TLC5940 and this thread does not.

daveyw:
Hello,

I’m thinking to use this on my setup. But instead of 1 LED I want to use a 50cm LED RGB SMD5050 LED strip.
9 strips.

Do I need then also the resistances and the blue thing above the TLC’s?
The power I will use not from the Arduino but from a 12V PSU (50A available).

I did search on this forum but couldn’t found any directly answer on my question.

Kind Regards,
Dave

If you use the TLC LED driver, then you would use one resistor to set the current level, and none on the LEDs. The TLC chips have 16 outputs, this is 3 8 bit shift registers, with shift registers not TLC LED drivers.

I used the TLC with LED strips in an instructable for making an ambilight (tv) clone.

It might be close enough to your thing that you can make just a few changes to do the thing you want to do.

@daveyw, please do not hijack. Threads split.