Led Strand Interface with ws2801 Chip? Software?

Discussion in 'Lights - Store Bought and Home Made' started by entropy64, Aug 12, 2010.

  1. entropy64

    entropy64 New Elf

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    Hello Board!

    I registered on this board, because i see much development is going on here.

    I have a Line of 625 RGB Led Modules with a WS2801 Chip controlling the LED.

    Now i am in search of a Software/Interface to put Live Video/ Effects into these Leds.

    At the moment i have a SD-Card Non-Realtime Controller, but i wanted to display VU Meters, Scrolltext etc.

    So you have any idea what setup i could use or build?

    Thanks in advance for your Kind help

    entropy64
     
  2. dmoore

    dmoore http://www.HolidayCoro.com

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  3. entropy64

    entropy64 New Elf

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    Thanks for your reply.

    As far as i understand this, it is not DMX but ws2801 SPI Interface.

    The Datasheet of the Chip:
    http://dhsdz.com/upload/file/1258863693.pdf

    The problem is, do i need a converter from DMX to SPI/i2c ?
     
  4. dmoore

    dmoore http://www.HolidayCoro.com

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    Yes - you will be able to use the upcoming protcol bridge - PB3212 to link your 2801 chipped lights to DMX which LSP works with.
     
  5. entropy64

    entropy64 New Elf

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    This board is so great :)

    Can you give me a link on the converter you mention? Is there any information/release date?

    Will the bridge somehow limit the number of pixels i can drive?

    Thanks,

    entropy
     
  6. dmoore

    dmoore http://www.HolidayCoro.com

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  7. entropy64

    entropy64 New Elf

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    Great stuff, indeed, thanks for the link.

    Am i right from reading the specs that i will need 10pcs controllers eg to drive 1000px from LightshowPro?
     
  8. dmoore

    dmoore http://www.HolidayCoro.com

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    If you have 625 nodes, then you have 1,875 channels (R+G+B). So, in the current design of the protocol bridge, you would need 4 PB3212 controllers (625/170 = 3.67). Thats nothing compared to what you paid for the pixels.
     
  9. entropy64

    entropy64 New Elf

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    Thanks for explaining dmoore!

    I was able to source the pixels at 1,60USD per pixel, and i hope the bridges are not so expensive :)

    Do the Bridges plug in directly to the PC or would i need yet another USB2DMX Interface/Converter?

    Thank you,

    entropy.
     
  10. dmoore

    dmoore http://www.HolidayCoro.com

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    Take a moment and read through the two posts on the Protocol Bridge - they have the answers to your questions.

    Thanks,
    David
     
  11. mschell

    mschell Full Time Elf

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    Put simply, you'll need a Bridge for each 170 pixel nodes (510 DMX channels) and a USB2DMX dongle for each Bridge or something like the EtherConGateway that should be able to talk to multiple Bridges, I think. The ECG would need to be driven by something that can output E.131 (DMX over Ethernet or something similar) via a network card.

    LSP does this. I believe there's a Vixen plug-in that have been developed as well.

    As dmoore mentioned, there's more details in the TP3212 section.
     
  12. mrpackethead

    mrpackethead Full Time Elf

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  13. dmoore

    dmoore http://www.HolidayCoro.com

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  14. mrpackethead

    mrpackethead Full Time Elf

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    sorry that should have read

    email john@response-box.com and we can send out some PCB's now. ( For USA ), or you can contact me for AU or NZ, although, i'm just waiting for them to arrive in the mail. ( john has a stack of 50 )

    Documentaiton is just getting finished up now.

    Btw, for teh aussies, this is the board that i had on display at the melbourne mini.
     
  15. jstjohnz

    jstjohnz Apprentice Elf

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    I have a controller that will control all of your strings with a single board, up to 680 pixels total. For full resolution you would need 4 DMX connections, but if you can get by with controlling your pixels in small groups instead of individually you can get by with fewer dmx inputs. More info here: http://doityourselfchristmas.com/forums/showthread.php?t=12444

    The next version will support E1.31, a type of DMX over ethernet. If your controlling software supports E1.31 you wouldn't need any interface at the PC other than a LANcard.

    -jim-
     

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