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Where do I start. NEWBIE — Parallax Forums

Where do I start. NEWBIE

ArchiverArchiver Posts: 46,084
edited 2002-09-18 20:05 in General Discussion
Hi,

You can get 1-2 MAX7219 LED drivers for FREE as samples directly from Dallas
Semi Conductor. Just call their sales dept from the web site at
http://www.maxim-ic.com/ and ask for free samples. It will take 5-10 working
days for them to come. Shipping is free!

I'll try to attached some working code and a jpg showing a BS2 with MAX7219
and a Panasonic 4 digit LED display.

Tom


[noparse][[/noparse]Non-text portions of this message have been removed]

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2002-09-18 07:58
    Hi John,

    If you send me your email address I attach some code and a jpeg for you use.
    I am having trouble sending attachments to the yahoo site?

    Thanks,
    Tom
  • ArchiverArchiver Posts: 46,084
    edited 2002-09-18 18:13
    I've tried to search, but LED is too common of a term.


    Can anyone point me as to where to start with a 2 digit LED display? Its a
    LN524YA the 8.8. display kind. Sorry to get so technical [noparse]:)[/noparse] Do I want a
    common cathode or common anode version?

    I'm sure I could use up all of my stamp pins and get it to work, but that
    isn't a good solution [noparse]:)[/noparse]


    A newbie at heart,


    John
  • ArchiverArchiver Posts: 46,084
    edited 2002-09-18 18:27
    Hi,

    I would use a pair of 74HC595, one chip per digit, works very well, is very
    cheap (.65 cents ea) and only uses 3 lines of your stamp. This would require
    Common cathode. Another choice is the Maxim7219 chip. It costs a lot of money
    and imo is not as flexible, but it is a small one chip solution.

    Goodluck, hope this helps



    > I've tried to search, but LED is too common of a term.
    >
    >
    > Can anyone point me as to where to start with a 2 digit LED display? Its a
    > LN524YA the 8.8. display kind. Sorry to get so technical [noparse]:)[/noparse] Do I want a
    > common cathode or common anode version?
    >
    > I'm sure I could use up all of my stamp pins and get it to work, but that
    > isn't a good solution [noparse]:)[/noparse]
    >
    >
    > A newbie at heart,
    >
    >
    > John
    >
    >
    > 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/
    >
    >
    >



    [noparse][[/noparse]Non-text portions of this message have been removed]
  • ArchiverArchiver Posts: 46,084
    edited 2002-09-18 20:05
    Tom,

    John@L... is my email address. Thanks for the help.


    (I'm sure I'll have more questions when I get going on this, but thanks for
    the start!)


    Thanks,

    John

    Original Message
    From: Tom Fanara [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=1Mgo6tXQthyYXe3ypS5g6QbQkaWevCHJJTjd72hmnuWV6ZFblXOfEGFx3qOHKOYMzQ1xCGrOv8HKavOcAygcrKU]tfanara@h...[/url
    Sent: Wednesday, September 18, 2002 1:58 AM
    To: basicstamps@yahoogroups.com
    Subject: Re: [noparse][[/noparse]basicstamps] Where do I start. NEWBIE


    Hi John,

    If you send me your email address I attach some code and a jpeg for you use.
    I am having trouble sending attachments to the yahoo site?

    Thanks,
    Tom


    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/
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