Shop OBEX P1 Docs P2 Docs Learn Events
LED Drivers - UCN5833A — Parallax Forums

LED Drivers - UCN5833A

ArchiverArchiver Posts: 46,084
edited 2002-04-21 01:46 in General Discussion
I need to drive 3" CC LED 7-seg displays (4 digists). This IC seems
to fit the bill perfectly. Has anyone used it? Any feedback?

thanks

Al Najjar

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2002-04-19 20:32
    For Al

    Have not used that chip but have used the MAX7219, which will drive 8 digits.
    Seems to work very well. Requires 3 inputs, data, load and clock.

    Sid


    [noparse][[/noparse]Non-text portions of this message have been removed]
  • ArchiverArchiver Posts: 46,084
    edited 2002-04-19 21:37
    The problem however is that the MAX7219 would not provide that
    voltage nor current required by my display. Which means that I will
    have to add some source drivers to the circuit that will complicate
    life for me....



    --- In basicstamps@y..., Newzed@a... wrote:
    > For Al
    >
    > Have not used that chip but have used the MAX7219, which will
    drive 8 digits.
    > Seems to work very well. Requires 3 inputs, data, load and clock.
    >
    > Sid
    >
    >
    > [noparse][[/noparse]Non-text portions of this message have been removed]
  • ArchiverArchiver Posts: 46,084
    edited 2002-04-19 23:34
    At 08:37 PM 4/19/02 +0000, brownstamp wrote:
    >The problem however is that the MAX7219 would not provide that
    >voltage nor current required by my display. Which means that I will
    >have to add some source drivers to the circuit that will complicate
    >life for me....

    Can you use common anode displays? If so, the TPIC6595 is a great little
    driver chip. They cascade easily so that you need only 3 lines from the
    Stamp and each output can sink 250 mA / 50 Vdc. But they are sinking
    outputs only.

    dwayne


    Dwayne Reid <dwayner@p...>
    Trinity Electronics Systems Ltd Edmonton, AB, CANADA
    (780) 489-3199 voice (780) 487-6397 fax

    Celebrating 18 years of Engineering Innovation (1984 - 2002)
    .-. .-. .-. .-. .-. .-. .-. .-. .-. .-
    `-' `-' `-' `-' `-' `-' `-' `-' `-'
    Do NOT send unsolicited commercial email to this email address.
    This message neither grants consent to receive unsolicited
    commercial email nor is intended to solicit commercial email.
  • ArchiverArchiver Posts: 46,084
    edited 2002-04-21 01:46
    How much current do you need per line? I just built a working driver for 8
    Volts @ 100mA per line.. let me know..

    brownstamp <brownstamp@y...> wrote: The problem however is that the
    MAX7219 would not provide that
    voltage nor current required by my display. Which means that I will
    have to add some source drivers to the circuit that will complicate
    life for me....



    --- In basicstamps@y..., Newzed@a... wrote:
    > For Al
    >
    > Have not used that chip but have used the MAX7219, which will
    drive 8 digits.
    > Seems to work very well. Requires 3 inputs, data, load and clock.
    >
    > Sid
    >
    >
    > [noparse][[/noparse]Non-text portions of this message have been removed]


    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/



    Do You Yahoo!?
    Yahoo! Games - play chess, backgammon, pool and more

    [noparse][[/noparse]Non-text portions of this message have been removed]
Sign In or Register to comment.