full color led display - Electronic Circuits Projects Diagrams Free

psergiu · 11th September 2007, 06:28 PM

Hello,

I am trying to build a full color led display, but i could really use any help i can get. I mostly want to know the what stands behind this project like what can use to control the leds(ic/pic/fpga) and which would you recommend, once i have built a matrix how can i connect it to the PC and see if it works, .

I was thinking at 8x8 matrices, each pixel being formed of 4 leds (2R1G1R).

Any documentation or links you think may help me please post it.

Thank you!

donniedj · 11th September 2007, 07:57 PM

Full color? Do you mean RGB 2R1G1B? Go with what is simple and cheap. If FPGA is easy for you then go that route, I would not. Forget IC as a means of control, for they are grunts whom may only serve to amplify power.

As for the micro, its your choice. As for the switching topology, use a multiplexing architecture, because controlling 64 individual leds and individual I/O lines is well... you get the picture.

Example 72-led board with native 24x3 multiplexing:
http://www.electro-tech-online.com/m...hlight=resolve

psergiu · 12th September 2007, 03:20 PM

Thanks, but i what do you suggest i use for this project.

I consider that building the 1st matrix is the hardest part. I have looked over the internet and i still haven't found a way to control the leds. The matrix is composed of 256 leds forming an 8x8 dot matrix, each pixel if formed of 4 leds(2R1G1B). I need to find a way to control it is such a way that after the panel is completed i must be able to play on it movies, pictures, etc.

Any info is useful!!!

David James · 12th September 2007, 07:22 PM

Quote:

Originally Posted by psergiu

... each pixel if formed of 4 leds(2R1G1B).

This is probably a stupid question, but why is it 4 LEDs (2R1G1B)? Why isn't it 3 LEDs, one of each colour?

Hero999 · 12th September 2007, 09:57 PM

I was going to say that, you'd be better off using two green LEDs as the eye is more sensitive to green than any other colour. There again if the eye is most sensitive to green there's no point in having extra green.

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11th September 2007, 06:28 PM	(permalink)
psergiu	full color led display Hello, I am trying to build a full color led display, but i could really use any help i can get. I mostly want to know the what stands behind this project like what can use to control the leds(ic/pic/fpga) and which would you recommend, once i have built a matrix how can i connect it to the PC and see if it works, . I was thinking at 8x8 matrices, each pixel being formed of 4 leds (2R1G1R). Any documentation or links you think may help me please post it. Thank you!

11th September 2007, 07:57 PM	(permalink)
donniedj	Full color? Do you mean RGB 2R1G1B? Go with what is simple and cheap. If FPGA is easy for you then go that route, I would not. Forget IC as a means of control, for they are grunts whom may only serve to amplify power. As for the micro, its your choice. As for the switching topology, use a multiplexing architecture, because controlling 64 individual leds and individual I/O lines is well... you get the picture. Example 72-led board with native 24x3 multiplexing: http://www.electro-tech-online.com/m...hlight=resolve

12th September 2007, 03:20 PM	(permalink)
psergiu	Thanks, but i what do you suggest i use for this project. I consider that building the 1st matrix is the hardest part. I have looked over the internet and i still haven't found a way to control the leds. The matrix is composed of 256 leds forming an 8x8 dot matrix, each pixel if formed of 4 leds(2R1G1B). I need to find a way to control it is such a way that after the panel is completed i must be able to play on it movies, pictures, etc. Any info is useful!!!

12th September 2007, 09:57 PM	(permalink)
Hero999	I was going to say that, you'd be better off using two green LEDs as the eye is more sensitive to green than any other colour. There again if the eye is most sensitive to green there's no point in having extra green. __________________ I also post at the following sites: http://www.stop-microsoft.org http://www.heated-debates.com Screen name: Aloone_Jonez And http://www.silicontronics.com, same screen name as here.