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5x7 led matrix display, how to make one ?

  • Thread starter Adrian de los Santos
  • Start date
A

Adrian de los Santos

Jan 1, 1970
0
I guys, first sorry for my english.

I am in a project where i need some 5x7 led matrix displays, but since
it has been impossible for me to find such component here in mexico
city, i want to create (or try to create) my own 5x7 led matrix, but
here its where my doubts come, how the 5x7 led arrays works ? i have
never use or seen one (appart form the photos on the web).

Anyone has a schematic on how those things are build ?

And more important, how they work ?

I want to build something like this:

http://www.sunled.com/SearchResult.asp?Series=XMxx30x

Thanks a lot for your kind reply
 
T

Tim

Jan 1, 1970
0
Normally all the cathodes are connected in one direction, and all the
anodes are connected in the other direction, so you have to have the vcc
and gnd signals at the right row and column to light a particular led. I
hope this give you enough guidance to get you started.

Good Luck

- Tim -
 
A

Adrian de los Santos

Jan 1, 1970
0
Normally all the cathodes are connected in one direction, and all the
anodes are connected in the other direction, so you have to have the
vcc and gnd signals at the right row and column to light a particular
led. I hope this give you enough guidance to get you started.

Good Luck

- Tim -


Thanks for the help tim, i actually have this sample design

http://www.demon.com.mx/ledarray.jpg

but how i turn on just one led not the entire row/column ?
 
W

William P.N. Smith

Jan 1, 1970
0
Adrian de los Santos said:
but how i turn on just one led not the entire row/column ?

Just turn on one row switch and one collumn switch. [BTW, I notice
you don't have any current limiting, and there's a "blue" wire missing
between (5,3) and (5,4)], and I can only assume you have the LEDs
polarized properly...

Some vendor of LED arrays must have an applications note...
 

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