How-To build 100 UV LEDs Stripe?

Using Arduino LEDs and Multiplexing
1

Hello, i have a question for us. Thanks in advance.

I need to build an UV led stripe with 100 leds (approx). I need to program this leds like a NeoPixel (as i said, ultraviolet, no RGB led).

I tried but i can't make it right!

What I need to begin? (Tutorials, material, etc...)

Thank you.

2

Without using something like these, your job will be extremely difficult:

970×728 190 KB

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What exactly do you need to do that is like neopixels? Why UV? What have you tried?

4

Controllable, fadeable UV lights, could be handy for something.

5

Hello, thanks for your replies.

That's for a personal artwork.

@larryd Thanks you, i didn't know this driver, i think that it working properly.

I attached one pic, I shoud connect like a picture?

One Driver NeoPixel for three leds. That way up to 100 leds?

Thanks again!

6

See Fig1 in the data sheet:

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7

Thanks, reading i have found this, TLC5940.

Apparently this driver allow control 16 channels or led in this case.

Do you think it is a better option? :confused:

Thanks!

8

Lot more long wires. I thought you wanted to make a strip?
WS2803 has 18 channels, easier to control than TLC5940
"General Description
The WS2803 is a constant current LED driver. It is designed for indoor/ outdoor LED displays and decorative LED lighting system. It is suitable for LED cascading applications. The WS2803 ownes 18 output channels, each channel can drive a constant current up to 30mA. WS2081 contains serial shift registers, data latches, output registers, band gap reference voltage generator, internal oscillator, and programmable constant output current drivers. The serial data is read into the shift registers at the rise edge of the external clock. The data and clock output buffers are designed for cascading another chip. The output current can be set by connect a resistor at IREF pin to set the output current of each channel. The over temperature protection is built in to protect the chip from thermal damage, if the core temperature level rise over 120℃, the output current will be decreased to stable the core temperature within a safe level. The 2-wire control scheme can reduce the system cost; it is very suitable for low cost LED decorative LED lighting systems."

WS2803-preliminary-En.pdf (437 KB)

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jagvalles:
Thanks, reading i have found this, TLC5940.

Apparently this driver allow control 16 channels or led in this case.

Do you think it is a better option? :confused:

Thanks!

There is no doubt that there are different ways of doing this.
It is up to you which way to go.

As Crossroads says, you wanted to make a strip.

What more do you want?

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10

Thank you to much!

I want to build something similar to this

But UV light, not white light.

One WS2803 each 18 leds?

Regards

11

Look at the data sheet Fig2

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12

Thanks for your answers.

I will try to build the UV led stripe with WS2803. Then, will post news.

Thank you very much!

13

28-pin WS2803 is a much bigger chip than the 8-pin Ws2811. That will affect the physical size of your strip. Maybe not too bad if using surface mount package.