Comments on: 24×16 RGB Display with PWM

By: Kevin

Kevin — Thu, 31 Mar 2011 00:39:10 +0000

Hi!

Just wondering if your PWM code will work with the Sparkfun RG (no blue) backpack? I’d rather not brick my RG if it won’t work for dimming each LED.

–Kevin

By: Visual Studio 2008 wich version

Visual Studio 2008 wich version — Mon, 23 Aug 2010 18:11:32 +0000

I try open Visual Studio 2008 solution from visual studio 2008 but error please
open wich version?
thanks.
javidian

By: chay_leg

chay_leg — Tue, 27 Jul 2010 10:16:04 +0000

hello,
I am studying about rgb led and i like your project, Give me scematic & part rgb led of your project? (case study) thank you

By: arjan

arjan — Mon, 29 Mar 2010 11:28:08 +0000

hi,

is there some more info? like schematic?

By: arjan

arjan — Sat, 19 Dec 2009 20:19:31 +0000

Hey,

Stel je de shcema’s om dit te bouwen ook beschikbaar?

hoop van je te horen.

Groeten,
Arjan

By: pakwids

pakwids — Tue, 31 Mar 2009 20:37:36 +0000

i want schematic & parts 24X16 rgb led matrix

By: weather & arduino » Selected the led-matrix

weather & arduino » Selected the led-matrix — Tue, 03 Feb 2009 15:39:52 +0000

[...] An example, one more [...]

By: dh

dh — Fri, 02 Jan 2009 14:38:10 +0000

Hello,
I am testing SPI master and slave program for atmega128. It works good. I test with some sample data from master to slave.
Now I encountered a problem of speed of sending data.
When using 16×16 dot matrix, the time takes too long because of its internal loop like 16,16,pwm loop. I can estimate if I use 10 16×16 matrix, it will take so long time.
In this case what is good for master?
What device do you use for master?

By: Elze

Elze — Mon, 22 Dec 2008 23:36:12 +0000

Yes,

Each byte you write to the rgb controller is stored in the internal data array. The data array must be selected (CS Low) to allow writing. When CS goes high the counter for the internal data array is reset to 0. This insures that a next write always starts at byte 0 of the data array.

In my program I assert CS (By making it low)
Write 64 bytes to the controller
De-assert CS (By making it high)

I think 16×16 is posible with the atmega128. Only I wouldn’t use so much shift registers when controlling 16×16x3 = 768 LEDs. But this should be a problem, the atmega128 has enough IO ports.

By: dh

dh — Mon, 22 Dec 2008 17:46:11 +0000

Thanks your reply. Now I don’t have LED unit. So I don’t know the exact pin alignment. Maybe it is related with the pin alignment?
I want to make 16×16 RGB LED display and control board like sparkfun. I think it is possible. And I want to control the RGB LED units by atmega128 across SPI. About SPI, to send data to RGB LED units
1. setup SPI
2. select RGB LED
3. send data by SPDR
4. no select RGB LED
Is this process OK?
Because I don’t use c#, so I cannot understand master program.
Thanks.