I have an arduino mega 2560 and wants to use it to drive a 16x64 LED array but the outputs are not enough, Is there any way i can achieve this? Thank you.

On 12/05/2019 22:11, wrote:
I have an arduino mega 2560 and wants to use it to drive a 16x64 LED array but the outputs are not enough, Is there any way i can achieve this? Thank you.


google "addressable latch"

e.g

https://www.tigoe.com/pcomp/code/arduinowiring/486/

--
Adrian C

On 5/12/19 5:11 PM, wrote:
I have an arduino mega 2560 and wants to use it to drive a 16x64 LED array but the outputs are not enough, Is there any way i can achieve this? Thank you.


You can use an addressable LED driver IC like this one from Texas
Instruments:

http://www.ti.com/lit/ds/symlink/tlc5940.pdf

Data is fed in serially and they can be individually addressed with PWM
brightness control for each LED, and daisy chained to create larger
arrays. They come in different number of output channels per chip, too.
there's likely maximum number of individual ICs that can be
daisy-chained before clock skew becomes a problem.

If you only need on/off then scanning a row/column arrangement with
addressable latches would work as another poster suggested:

https://www.nxp.com/docs/en/data-sheet/MC33996.pdf

would also need a high-side driver.

Controlling a large billboard-like array that can do colors and
full-motion video is a non-trivial project, but a scrolling message
board for text doesn't require a high data rate.

On Monday, 13 May 2019 22:03:59 UTC+1, bitrex wrote:
On 5/12/19 5:11 PM, wrote:
I have an arduino mega 2560 and wants to use it to drive a 16x64 LED array but the outputs are not enough, Is there any way i can achieve this? Thank you.


You can use an addressable LED driver IC like this one from Texas
Instruments:

http://www.ti.com/lit/ds/symlink/tlc5940.pdf

Data is fed in serially and they can be individually addressed with PWM
brightness control for each LED, and daisy chained to create larger
arrays. They come in different number of output channels per chip, too.
there's likely maximum number of individual ICs that can be
daisy-chained before clock skew becomes a problem.

If you only need on/off then scanning a row/column arrangement with
addressable latches would work as another poster suggested:

https://www.nxp.com/docs/en/data-sheet/MC33996.pdf

would also need a high-side driver.

Controlling a large billboard-like array that can do colors and
full-motion video is a non-trivial project, but a scrolling message
board for text doesn't require a high data rate.

If spinning the display is an option you can greatly reduce the electronics.


NT

On Sunday, May 12, 2019 at 10:11:20 PM UTC+1, wrote:
I have an arduino mega 2560 and wants to use it to drive a 16x64 LED array but the outputs are not enough, Is there any way i can achieve this? Thank you.

Thank you everyone, I am going to try all ya suggestions

On Monday, May 13, 2019 at 5:03:59 PM UTC-4, bitrex wrote:
On 5/12/19 5:11 PM, wrote:
I have an arduino mega 2560 and wants to use it to drive a 16x64 LED array but the outputs are not enough, Is there any way i can achieve this? Thank you.


You can use an addressable LED driver IC like this one from Texas
Instruments:

http://www.ti.com/lit/ds/symlink/tlc5940.pdf

Data is fed in serially and they can be individually addressed with PWM
brightness control for each LED, and daisy chained to create larger
arrays. They come in different number of output channels per chip, too.
there's likely maximum number of individual ICs that can be
daisy-chained before clock skew becomes a problem.

I'm sure an operating system could help there.

If you only need on/off then scanning a row/column arrangement with
addressable latches would work as another poster suggested:

https://www.nxp.com/docs/en/data-sheet/MC33996.pdf

would also need a high-side driver.

Controlling a large billboard-like array that can do colors and
full-motion video is a non-trivial project, but a scrolling message
board for text doesn't require a high data rate.