Shop OBEX P1 Docs P2 Docs Learn Events
Scrolling Sign with Basic Stamp & 5X7 Matrix LED — Parallax Forums

Scrolling Sign with Basic Stamp & 5X7 Matrix LED

ArchiverArchiver Posts: 46,084
edited 2002-08-01 00:53 in General Discussion
The secret is in "multiplexing"
search for some information on this. Sorry I dont have time to expand on it
at the moment.
The "pic microcontroller handbook" has a good example.

Regards,
Chris, West Oz

Original Message
From: "Matt Georgy" <mgeorgy@d...>
To: <basicstamps@yahoogroups.com>
Sent: Thursday, August 01, 2002 6:50 AM
Subject: [noparse][[/noparse]basicstamps] Scrolling Sign with Basic Stamp & 5X7 Matrix LED


> I was at Orvac electronics, So. CA, a couple of weeks ago and the sales
> person pointed out an LED project that used the Basic Stamp to control a
> series of 5X7 Matrix LEDs to create a scrolling sign. I asked for a
> schematic, but they couldn't since the person who created it had left the
> company and taken all the documentation. I've searched the internet and
> Parallaxs' website with no luck.
> The closest thing I've found is an article in N&V which was republished
by
> Parallax in their 2 vol compilation set (Column #73). The project in the
> article only uses a single 5X7 LED, I would like to use a few more (5-8);
> the store demo used 8.
>
> Any suggestions?
>
> Thanks,
> Matt
>
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2002-07-31 23:50
    I was at Orvac electronics, So. CA, a couple of weeks ago and the sales
    person pointed out an LED project that used the Basic Stamp to control a
    series of 5X7 Matrix LEDs to create a scrolling sign. I asked for a
    schematic, but they couldn't since the person who created it had left the
    company and taken all the documentation. I've searched the internet and
    Parallaxs' website with no luck.
    The closest thing I've found is an article in N&V which was republished by
    Parallax in their 2 vol compilation set (Column #73). The project in the
    article only uses a single 5X7 LED, I would like to use a few more (5-8);
    the store demo used 8.

    Any suggestions?

    Thanks,
    Matt
  • ArchiverArchiver Posts: 46,084
    edited 2002-08-01 00:53
    Funny you should mention that -- I have a similar project going on right
    now, but with a single display. Still in the planning stages though -- gonna
    do it with a Stamp I until I get some of the 8-pin AVR processors. I haven't
    looked at that N&V article yet, but the biggest challenge is probably the
    driver circuit. I'll check out the article tonight.

    I suppose you've seen that Digi-Key has a bunch of these displays really
    cheap, including super-bright models.
    Original Message

    > I was at Orvac electronics, So. CA, a couple of weeks ago and the sales
    > person pointed out an LED project that used the Basic Stamp to control a
    > series of 5X7 Matrix LEDs to create a scrolling sign. I asked for a
    > schematic, but they couldn't since the person who created it had left the
    > company and taken all the documentation. I've searched the internet and
    > Parallaxs' website with no luck.
    > The closest thing I've found is an article in N&V which was republished
    by
    > Parallax in their 2 vol compilation set (Column #73). The project in the
    > article only uses a single 5X7 LED, I would like to use a few more (5-8);
    > the store demo used 8.
Sign In or Register to comment.