Close

we got color

A project log for 384:LED

Mini (1.44'' x 0.94'' or 24mm x 37mm) 8X16 RGB LED Array. 128 RGB LEDs with three LED chip each gives 384.

AlexAlex 05/09/2016 at 21:254 Comments

The multiplexing finally works! The Matrix can now show images saved in RAM. Per pixel 8 Bit are used (RRRGGGBB). Here is a image of the result:

photographing this is not easy because of the multiplexing. This can be also seen in this image by the different brightness of the lines. But the human eye is worse then this camera. So you do not see it.

The image "file" for that looks like this (I used some defines for the color values):

{ {WHITE, YELLOW, CYAN, GREEN, PINK, RED, BLUE, BLACK, ...},
  {WHITE, YELLOW, CYAN, GREEN, PINK, RED, BLUE, BLACK, ...},
  {WHITE, YELLOW, CYAN, GREEN, PINK, RED, BLUE, BLACK, ...},
  {WHITE, YELLOW, CYAN, GREEN, PINK, RED, BLUE, BLACK, ...},
...};

compared to the file extract, the display is rotated by 180° on the image. I should really mark the upper right corner somehow to make the images right orientated.

Discussions

K.C. Lee wrote 05/09/2016 at 22:19 point

Nice!

  Are you sure? yes | no

Yann Guidon / YGDES wrote 05/09/2016 at 21:36 point

Yay !!!

  Are you sure? yes | no

davedarko wrote 05/09/2016 at 21:33 point

ahhh beauty. What's the power consumption?

  Are you sure? yes | no

Alex wrote 05/10/2016 at 18:04 point

Thanks!
The power question is a good question. I just measured 185mA when powering from a lipo (U ~3,6V)- This would be ~0,67 Watts. But I think I will decrease the brightness. It is quite bright now.

  Are you sure? yes | no