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Topic: driving many RGB LEDs with the WS2803 (Read 192 times) previous topic - next topic

weissert

Hi

I found two very old threads http://forum.arduino.cc/index.php?topic=307236.0 and http://forum.arduino.cc/index.php?topic=140308.0 about this topic.  Both were very interesting. I plan to drive 54 LEDs.

 My questions are:

1. is the WS2803 (nine of them) still the best way to drive 54 RGB LED?

2. Where can I get the WS2803?  I searched ebay and only found Alibaba with a source in China.

Thanks in Advance

weissert


Hi

I found two very old threads http://forum.arduino.cc/index.php?topic=307236.0 and http://forum.arduino.cc/index.php?topic=140308.0 about this topic.  Both were very interesting. I plan to drive 54 LEDs.

 My questions are:

1. is the WS2803 (nine of them) still the best way to drive 54 RGB LED?

2. Where can I get the WS2803?  I searched ebay and only found Alibaba with a source in China.

Thanks in Advance

[/quote]

Paul__B

1. is the WS2803 (nine of them) still the best way to drive 54 RGB LED?
And how do you figure driving 54 LEDs from nine chips?  Please explain - with diagrams if necessary.

What LEDs?  If you are going to ask a question, ask it properly.  Always cite exact parts, with Web links.

Generally it is going to be far more practical to use integrated RGB LEDs - "NeoPixels" or similar.

2. Where can I get the WS2803?  I searched eBay and only found Alibaba with a source in China.
And what other country do you suppose manufactures these chips?

Yeah, some other countries manufacture some things ...  :smiley-roll:

weissert

Wow, quite a hostile post there Paul.  The references I cited list all the information I had, so I deemed it unnecessary to repeat all that.  However with some further digging, I did finally find the Neopixel LED from Adafruit and that is exactly what I needed.  Just needed someone to point the way.  Thanks for your post.

Paul__B

Wow, quite a hostile post there Paul.
Not at all!  Perhaps you should read the reference.  :smiley-lol:

The references I cited list all the information I had, so I deemed it unnecessary to repeat all that.
OK, you got me.  You said WS2803, which is hens teeth, I was thinking of WS2801 (or WS2811/ WS2812) which are available in droves and well documented in use.  So I didn't deem it necessary to chase down your links.  :smiley-roll:

However with some further digging, I did finally find the Neopixel LED from Adafruit and that is exactly what I needed.  Just needed someone to point the way.  Thanks for your post.
The "NeoPixel" is of course, the WS2812 whose one-wire drive requires special coding - which is of course available as a library.  The WS2801 uses a clocked two-wire interface which is much easier to work with.

As to your original point, Worldsemi is a wholly Chinese company, representing the way China has acquired "Western" technology and made it their own, so you need not expect their products to necessarily be available anywhere else.  The WS2803 has a more niche market than the other chips and is thus not available on eBay, let alone American (or "Western") sellers.  Adafruit of course sources its parts directly from China without a local "middleman".  Similarly with SparkFun.  But the Chinese manufacturers of their projects then offer them direct on eBay.  Just as well for those of us outside the US as US postage fees are completely prohibitive.

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