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'[PIC] seraching a 100 matrix LED driven by a singl'
2009\05\04@071109 by J. Bakshi

picon face
Dear list,

I am a Linux professional and Electronics hobbyist.
My site is running at http://jbakshi.50webs.com

I am looking for a 100 LED matrix driven by a single PIC only. I like to use it to display some messages in animated way.
Any such circuits available in the net ?

kindly let me know.

2009\05\04@073205 by olin piclist

face picon face
J. Bakshi wrote:
> I am looking for a 100 LED matrix driven by a single PIC only. I like
> to use it to display some messages in animated way. Any such circuits
> available in the net ?

I don't know, but it wouldn't take much to make one.  Is this a personal
project, a commercial one-off, or a volume product?


********************************************************************
Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products
(978) 742-9014.  Gold level PIC consultants since 2000.

2009\05\04@074205 by Jan-Erik Soderholm

face picon face
J. Bakshi wrote:
> Dear list,
>
> I am looking for a 100 LED matrix driven by a single PIC only.
> I like to use it to display some messages in animated way.

Text-messages ? Or what ?

> Any such circuits available in the net ?

There are LED-matrix displays like this one:
http://www.jescab.se/upload/LED_Matrix_Display.jpg

It's a 8x8x8 LED red/green matrix. Needs an externa processor to
drive the multiplexing of the rows. I have a box in my store...

Jan-Erik.

>
> kindly let me know.

2009\05\04@082736 by J. Bakshi

picon face
On Mon, 04 May 2009 13:37:50 +0200
Jan-Erik Soderholm <spam_OUTjan-erik.soderholmTakeThisOuTspamtelia.com> wrote:

> J. Bakshi wrote:
> > Dear list,
> >
> > I am looking for a 100 LED matrix driven by a single PIC only.
> > I like to use it to display some messages in animated way.
>
> Text-messages ? Or what ?

Yes Text messages. Like some names will come one after one, then say each individual name come with animation etc..
Not a very big circuit required. The matrix should be battery operated and the circuit should use a single PIC  for educational purpose and fun.


{Quote hidden}

2009\05\04@084246 by Jinx

face picon face

> Any such circuits available in the net ?

Yes, mine is

http://home.clear.net.nz/pages/joecolquitt/message.html

2009\05\04@085948 by Jan-Erik Soderholm

face picon face
Jinx wrote:
>> Any such circuits available in the net ?
>
> Yes, mine is
>
> home.clear.net.nz/pages/joecolquitt/message.html
>


A bit off-topic, but it's an "interesting" web page you have...

:-)

http://home.clear.net.nz/pages/joecolquitt/
http://home.clear.net.nz/pages/joecolquitt/home.html

Jan-Erik.

2009\05\04@093011 by Jinx

face picon face
>> home.clear.net.nz/pages/joecolquitt/message.html
>>
> A bit off-topic, but it's an "interesting" web page you have...
>
> :-)

Always aiming for interesting !

And very much neglected unfortunately. Tidying it up is something I
think I should do when I've time. Then forget. Then remember when
I'm busy. So it never gets done. Hmmm, maybe that's something I
could do when I have time ......

Re the OP's LED matrix

It would be helpful to know what format or dimensions he would
like the matrix. For example 10x10 ? A text area and a graphics
area ?

The one I linked to, and most small boards would be like it, couldn't
do proper animated graphics with the shown drive lines. It's really
made for general scrolling effects. A larger PIC with more I/O though
could be used with the LEDs split into two areas. For example one for
text, scrolled or otherwise, and another for animations

2009\05\04@102535 by J. Bakshi

picon face
On Tue, 05 May 2009 00:42:17 +1200
Jinx <.....joecolquittKILLspamspam@spam@clear.net.nz> wrote:

>
> > Any such circuits available in the net ?
>
> Yes, mine is
>
> home.clear.net.nz/pages/joecolquitt/message.html
>

Thanks, really nice.
Is not not possible to go for a higher PIC which has more I/O so that we can bypass the usage of 74HC164 ?

Thanks

2009\05\04@104522 by Jinx

face picon face
> Is not not possible to go for a higher PIC which has more I/O so
> that we can bypass the usage of 74HC164 ?

Yes you could do that. How many rows and columns do you think
would be needed for your project ? For mine the shift registers are
being used as I/O expanders because of the width of the array and
64 column drives is beyond the capability of a small PIC

2009\05\04@105744 by J. Bakshi

picon face
On Tue, 05 May 2009 02:44:00 +1200
Jinx <joecolquittspamKILLspamclear.net.nz> wrote:

> > Is not not possible to go for a higher PIC which has more I/O so
> > that we can bypass the usage of 74HC164 ?
>
> Yes you could do that. How many rows and columns do you think
> would be needed for your project ? For mine the shift registers are
> being used as I/O expanders because of the width of the array and
> 64 column drives is beyond the capability of a small PIC

10x10 ( so 100 matrix )

2009\05\04@121918 by Tamas Rudnai

face picon face
On Mon, May 4, 2009 at 3:54 PM, J. Bakshi <.....bakshi12KILLspamspam.....gmail.com> wrote:

> 10x10 ( so 100 matrix )
>

Look for multiplexing on google or search the word on this page:

http://www.mikroe.com/en/books/picmcubook/appb/

The principal is the same as described there, only that you need 10x10 pins,
so select a large pin count/IO device for that.

Tamas
--
http://www.mcuhobby.com

2009\05\04@124144 by William \Chops\ Westfield

face picon face
On May 4, 2009, at 7:54 AM, J. Bakshi wrote:
>
> 10x10 ( so 100 matrix )

that's not what you said the first time!

I've been having quite a bit of fun with one of these 16*24 displays:
   www.sureelectronics.net/goods.php?id=142
This has an intelligent controller and is self-refreshing, so there is  
a lot less continuous demand on the cpu.  It's fast enough to do  
animations even through the rather slow Arduino libraries, so a PIC  
should do fine as well.  And it's REALLY hard to beat the price!

Much discussion and quite a bit of code here:
  http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1225239439

BillW

2009\05\04@141045 by Jan-Erik Soderholm

face picon face
Tamas Rudnai wrote:
> On Mon, May 4, 2009 at 3:54 PM, J. Bakshi <EraseMEbakshi12spam_OUTspamTakeThisOuTgmail.com> wrote:
>
>> 10x10 ( so 100 matrix )
>>
>
> Look for multiplexing on google or search the word on this page:
>
> www.mikroe.com/en/books/picmcubook/appb/
>
> The principal is the same as described there, only that you need 10x10 pins,

Why not 10 + 10 (=20) pins ?
You shouldn't need 100 pins...


> so select a large pin count/IO device for that.
>
> Tamas

2009\05\04@142752 by Tamas Rudnai

face picon face
On Mon, May 4, 2009 at 7:10 PM, Jan-Erik Soderholm <
jan-erik.soderholmspamspam_OUTtelia.com> wrote:

> > The principal is the same as described there, only that you need 10x10
> pins,
>
> Why not 10 + 10 (=20) pins ?
> You shouldn't need 100 pins...


Eh, I meant matrix, of course it is 10+10=20 as algebric :-)

Thanks for the note!

Tamas
--
http://www.mcuhobby.com

2009\05\04@164705 by antoniasse

flavicon
face
What about MAX7221. You can drive 8x8 matrix led through SPI.


----- Original Message -----
From: "Tamas Rudnai" <@spam@tamas.rudnaiKILLspamspamgmail.com>
To: "Microcontroller discussion list - Public." <KILLspampiclistKILLspamspammit.edu>
Sent: Monday, May 04, 2009 3:27 PM
Subject: Re: [PIC] seraching a 100 matrix LED driven by a single pic


{Quote hidden}

> --

2009\05\05@044239 by Jinx

face picon face
> There are LED-matrix displays like this one:
> http://www.jescab.se/upload/LED_Matrix_Display.jpg

You could play a very predictable game of Dominoes with those

Good colour and brightness matching ?

2009\05\05@051255 by Jan-Erik Soderholm

face picon face
Jinx wrote:
>> There are LED-matrix displays like this one:
>> www.jescab.se/upload/LED_Matrix_Display.jpg
>
> You could play a very predictable game of Dominoes with those

No idea. It depends on the software drving them, I guess.
Note that they are not "static" so one must have some
processor doing the scanning of the rows fast enought
to supress blinking.

>
> Good colour and brightness matching ?

No idea. I might dig up some vidoes someone made
with this...

Jan-Erik


2009\05\05@060534 by Jinx

face picon face
>> www.jescab.se/upload/LED_Matrix_Display.jpg
>>
>> You could play a very predictable game of Dominoes with those
>
> No idea

http://en.wikipedia.org/wiki/Dominoes

Hmmm. Electronic dominoes with PICs .......

2009\05\05@191600 by cdb

flavicon
face
If you use the ' Charlieplexing ' method, then you can double up the
amount of LEDs per pin - the formula being   n * (n-1) where 'n' is
the number of pins you want to use.

This would make the code a little more complicated though.

Colin
--
cdb, spamBeGonecolinspamBeGonespambtech-online.co.uk on 6/05/2009

Web presence: http://www.btech-online.co.uk  

Hosted by:  http://www.1and1.co.uk/?k_id=7988359







2009\05\06@204116 by Andrew Kieran

picon face


Jan-Erik;
Do you know how to interface this display to a Pic?  I picked up a very similar
Casino Data Systems board at a surplus store but haven't figured out the
signal/power requirements.  I'd really appreciate any interface info you could
send on.

Andrew


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Voicemail, fax, email, and a lot more
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---- On Mon, 4 May 2009, Jan-Erik Soderholm (TakeThisOuTjan-erik.soderholmEraseMEspamspam_OUTtelia.com)
wrote:

J. Bakshi wrote:
> Dear list,
>
> I am looking for a 100 LED matrix driven by a single PIC only.
> I like to use it to display some messages in animated way.

Text-messages ? Or what ?

> Any such circuits available in the net ?

There are LED-matrix displays like this one:
http://www.jescab.se/upload/LED_Matrix_Display.jpg

It's a 8x8x8 LED red/green matrix. Needs an externa processor to
drive the multiplexing of the rows. I have a box in my store...

Jan-Erik.

>
> kindly let me know.

2009\05\07@034912 by Jan-Erik Soderholm

face picon face
Here is what I have on this item :

http://www.jescab.se/upload/cds_disp.pdf
www.jescab.se/upload/LED_Large_Back2.jpg
www.jescab.se/upload/LED_Matrix_Display.jpg
www.jescab.se/upload/LED_Quad_Small_Back1.jpg
http://www.jescab.se/upload/LED_Quad_Small1.jpg

I might also find some dsPIC30 code someone write
for this (a scrolling text display).

Regards,
Jan-Erik.

Andrew Kieran wrote:
{Quote hidden}

2009\05\07@075652 by VICENTE COLOMAR PRATS

picon face
Can you post the link to that code? I'd apreciate it, as I'm starting to
learn programming 30F dspics.

2009/5/7, Jan-Erik Soderholm <jan-erik.soderholmEraseMEspam.....telia.com>:
>
> Here is what I have on this item :
>
> I might also find some dsPIC30 code someone write
> for this (a scrolling text display).
>
> Regards,
> Jan-Erik.
>
>

2009\05\07@083900 by Jan-Erik Soderholm

face picon face
Hi.
Here are some dsPIC30 code for a "snake" game:
http://mrmackey.no-ip.org/elektronik/ledmatrix/ledmatrix_0.1.zip

And here is what it looks like :
http://mrmackey.no-ip.org/elektronik/ledmatrix/worm.wmv

In another exemple he had an telnet-client in the dsPIC so
anyone could login to the dsPIC and enter some text for display.
The display was seen through a web-cam on his desk... :-)

Could not find any source for that, though...

Jan-Erik.


VICENTE COLOMAR PRATS wrote:
{Quote hidden}

2009\05\08@214956 by Andrew Kieran

picon face

Jan-Erik.  Thanks for the schematic.  Do you by any chance know anything about
the power requirements and pinout?  Are these designed to run off 12 volts (in
to the regulator)?

Andrew




________________________________________________
Get your own "800" number
Voicemail, fax, email, and a lot more
http://www.ureach.com/reg/tag


---- On Thu, 7 May 2009, Jan-Erik Soderholm (RemoveMEjan-erik.soderholmEraseMEspamEraseMEtelia.com)
wrote:

Here is what I have on this item :

http://www.jescab.se/upload/cds_disp.pdf
www.jescab.se/upload/LED_Large_Back2.jpg
www.jescab.se/upload/LED_Matrix_Display.jpg
www.jescab.se/upload/LED_Quad_Small_Back1.jpg
http://www.jescab.se/upload/LED_Quad_Small1.jpg

I might also find some dsPIC30 code someone write
for this (a scrolling text display).

Regards,
Jan-Erik.

Andrew Kieran wrote:
>
> Jan-Erik;
> Do you know how to interface this display to a Pic?  I picked up a very
similar
{Quote hidden}

2009\05\09@090258 by Jan-Erik Soderholm

face picon face
I have no further info about them.
Some has bought a few from me and didn't had
any problem getting them running.

Jan-Erik.

Andrew Kieran wrote:
{Quote hidden}

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