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Smarter Life
Blog A Very Compact Christmas Display - Part 034
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  • Author Author: COMPACT
  • Date Created: 16 Dec 2013 8:24 AM Date Created
  • Views 758 views
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  • Comments 4 comments
  • psoc4
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A Very Compact Christmas Display - Part 034

COMPACT
COMPACT
16 Dec 2013

LEDs Have Some Fun

image

Here's another 5,000 RGB LEDS! They've just arrived and are hermetically sealed to keep the moisture out to keep the fresh like vacuum sealed food.

The more the merrier I say!

 

Asking the obvious question

How does one get 3,000 let alone 8,000 RGB LEDs working on a PSoC 4?

When you do the arithmetic, the amount of memory required is for 3,072 LEDS is 3,072 x 3 = 9,216 for a fully capable and dynamic 24-bit colour bitmapped display.

The PSoC 4 is designed as a low cost device and has 6k SRAM available leaving considerably short of the memory required just for the frame buffer.

One solution is to use its bigger sibling the PSoC 5. Another is to limit the capability of the display by limiting functionality.

I've managed to devise a solution which initial testing seems to work very well.

 

Can anyone guess how I've accomplished it?

(The hints are littered throughout my articles).

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Top Comments

  • vsluiter
    vsluiter over 11 years ago in reply to shabaz +1
    Or keep using random colors to store just a brightness parameter....
  • DAB
    DAB over 11 years ago

    Hi Monte,

     

    I find it difficult to deal with any numbers larger then ten.

    Yes I am finger limited and I no longer think in binary.

     

    DAB

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  • vsluiter
    vsluiter over 11 years ago in reply to shabaz

    Or keep using random colors to store just a brightness parameter....

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  • shabaz
    shabaz over 11 years ago

    I see your smart thinking, you stopped at 8,000 because after that you will need another pair of sunglasses :-)

    From the Xmas message video, maybe either character locations can be stored, or a list of points that need plotting, or implement a line drawing algorithm to calculate the list of points? ;-)

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  • vsluiter
    vsluiter over 11 years ago

    One guess: use a PSOC in between to sniff the data and take actions accordingly?

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