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LCD Howto? — Parallax Forums

LCD Howto?

ArchiverArchiver Posts: 46,084
edited 2001-02-01 01:42 in General Discussion
On 31 Jan 01 at 2:50, t_i_m@h... wrote:

> Newbie has a question about LCD's. I would like to toy around
> with using a LCD with my BS2sx but I can't find any cheap serial
> LCD's (for less then $40). I found plenty of parallel LCD's but I
> am not sure how to hook these up to the stamp.

Takes a minimum of six pins to do a simple but functional parallel
connection to a HD44780-compatible LCD.

> If I buy a parallel LCD do I need to buy one of those extra
> controller boards (one place was selling one as an LCD Backpack)?

No...assuming you get a HD44780-compatible LCD.

> I'm looking for the cheapest route possible.

That would be a parallel connection to a ~$10 or less, surplus or
pulled LCD from someplace like BG Micro (www.bgmicro.com). There are
plenty of coding examples available and help from folks on this list
to help you should you choose to go this route.

Steve

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2001-01-31 02:50
    Newbie has a question about LCD's. I would like to toy around with
    using a LCD with my BS2sx but I can't find any cheap serial LCD's
    (for less then $40). I found plenty of parallel LCD's but I am not
    sure how to hook these up to the stamp. If I buy a parallel LCD do I
    need to buy one of those extra controller boards (one place was
    selling one as an LCD Backpack)? I'm looking for the cheapest route
    possible.
  • ArchiverArchiver Posts: 46,084
    edited 2001-01-31 03:20
    The new BS2P can drive an LCD. You'll also find code for doing so with a
    regular Stamp in my book Microcontroller Projects with Basic Stamps (on
    special this month -- http://www.al-williams.com/awce/).

    The serial LCDs are very nice since they only take one pin and are as easy
    as you can imagine to use.

    I think Jon Williams also has some LCD code -- maybe at the Nuts & Volts
    site?

    Regards,

    Al Williams
    AWC
    * Basic Stamp FAQ: http://www.al-williams.com/wd5gnr/stampfaq.htm


    >
    Original Message
    > From: t_i_m@h... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=VRV-6WXcwBJJF_DvilUxgC3eCMlQA1k3cJrd0nK4E30JchekEF0YXkXtrZYneGeiolFzBNI3yhwk]t_i_m@h...[/url
    > Sent: Tuesday, January 30, 2001 8:51 PM
    > To: basicstamps@yahoogroups.com
    > Subject: [noparse][[/noparse]basicstamps] LCD Howto?
    >
    >
    > Newbie has a question about LCD's. I would like to toy around with
    > using a LCD with my BS2sx but I can't find any cheap serial LCD's
    > (for less then $40). I found plenty of parallel LCD's but I am not
    > sure how to hook these up to the stamp. If I buy a parallel LCD do I
    > need to buy one of those extra controller boards (one place was
    > selling one as an LCD Backpack)? I'm looking for the cheapest route
    > possible.
    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2001-01-31 03:31
    I've never wanted to give up enough pins to run the LCD in parallel mode!
    Jameco has the Trisys module.
    http://www.jameco.com/cgi-bin/ncommerce3/ProductDisplay?prmenbr=91&prrfnbr=4511&\
    cgrfnbr=501&ctgys
    I've used this. It works, but I have always come back to Scott's Backpack.
    Mike

    At 02:50 AM 1/31/2001 +0000, you wrote:
    >Newbie has a question about LCD's. I would like to toy around with
    >using a LCD with my BS2sx but I can't find any cheap serial LCD's
    >(for less then $40). I found plenty of parallel LCD's but I am not
    >sure how to hook these up to the stamp. If I buy a parallel LCD do I
    >need to buy one of those extra controller boards (one place was
    >selling one as an LCD Backpack)? I'm looking for the cheapest route
    >possible.

    _________________________________
    Mike Walsh
    walsh@i...
  • ArchiverArchiver Posts: 46,084
    edited 2001-01-31 03:44
    I got a serial 2 line X 16 character LCD from Parallax for $29 (I don't know
    if they have any left)... they also have sample code on their web site...
    Original Message
    From: "Al Williams" <alw@a...>
    To: <basicstamps@yahoogroups.com>
    Sent: Tuesday, January 30, 2001 7:20 PM
    Subject: RE: [noparse][[/noparse]basicstamps] LCD Howto?


    > The new BS2P can drive an LCD. You'll also find code for doing so with a
    > regular Stamp in my book Microcontroller Projects with Basic Stamps (on
    > special this month -- http://www.al-williams.com/awce/).
    >
    > The serial LCDs are very nice since they only take one pin and are as easy
    > as you can imagine to use.
    >
    > I think Jon Williams also has some LCD code -- maybe at the Nuts & Volts
    > site?
    >
    > Regards,
    >
    > Al Williams
    > AWC
    > * Basic Stamp FAQ: http://www.al-williams.com/wd5gnr/stampfaq.htm
    >
    >
    > >
    Original Message
    > > From: t_i_m@h... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=c2Nd7KYDx1HNUeHB8gR1sJoFi9SVboqTpz2mmWmK9odeTr5FN78wDKZkpEqPUnHYfkzezFKRSSvi]t_i_m@h...[/url
    > > Sent: Tuesday, January 30, 2001 8:51 PM
    > > To: basicstamps@yahoogroups.com
    > > Subject: [noparse][[/noparse]basicstamps] LCD Howto?
    > >
    > >
    > > Newbie has a question about LCD's. I would like to toy around with
    > > using a LCD with my BS2sx but I can't find any cheap serial LCD's
    > > (for less then $40). I found plenty of parallel LCD's but I am not
    > > sure how to hook these up to the stamp. If I buy a parallel LCD do I
    > > need to buy one of those extra controller boards (one place was
    > > selling one as an LCD Backpack)? I'm looking for the cheapest route
    > > possible.
    > >
    > >
    > >
    >
    >
    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2001-01-31 13:41
    Another place to try is http://www.eio.com I buy all my LCD screens from
    here. 4x20 backlit, inverse (light letters, darks background) LCD for 15$.

    -Rob

    > That would be a parallel connection to a ~$10 or less, surplus or
    > pulled LCD from someplace like BG Micro (www.bgmicro.com). There are
    > plenty of coding examples available and help from folks on this list
    > to help you should you choose to go this route.
    >
    > Steve
    >
    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2001-01-31 16:04
    > Newbie has a question about LCD's. I would like to toy around with
    > using a LCD with my BS2sx but I can't find any cheap serial LCD's
    > (for less then $40). I found plenty of parallel LCD's but I am not
    > sure how to hook these up to the stamp. If I buy a parallel LCD do I need
    > to buy one of those extra controller boards (one place was selling one as
    > an LCD Backpack)? I'm looking for the cheapest route possible.
    >

    Have a look at our new Econo-LCD Serial Interface Kit. It is a fully
    beffered 9600 baud serial interface (you supply the LCD, or we have
    a 2x16 unit available) for the equivalent of about $20 US

    http://www.hvwtech.com/econo-lcd.htm


    Mark Hillier, VE6HVW
    President, HVW Technologies Inc.
    Canadian Distributors of Parallax Products and other Neat Stuff
    Tel: +403-730-8603 Fax: +403-730-8903
    See our NEW BASIC Stamp Prototyping tools !
    http://www.hvwtech.com/stampstack.htm
  • ArchiverArchiver Posts: 46,084
    edited 2001-01-31 17:39
    [font=arial,helvetica]In a message dated 1/30/01 9:27:06 PM Central Standard Time,
    t_i_m@hotmail.com writes:


    Newbie has a question about LCD's. ·I would like to toy around with
    using a LCD with my BS2sx but I can't find any cheap serial LCD's
    (for less then $40). ·I found plenty of parallel LCD's but I am not
    sure how to hook these up to the stamp. ·If I buy a parallel LCD do I
    need to buy one of those extra controller boards (one place was
    selling one as an LCD Backpack)? ·I'm looking for the cheapest route
    possible.



    The StampWorks manual (available for download at www.parallaxinc.com) has a
    whole section on connecting Stamps to a parallel LCD.

    -- Jon Williams
    -- Dallas, TX[/font]
  • ArchiverArchiver Posts: 46,084
    edited 2001-01-31 17:44
    [font=arial,helvetica]In a message dated 1/31/01 12:03:36 AM Central Standard Time,
    parkiss@earthlink.net writes:


    > Newbie has a question about LCD's. ·I would like to toy around
    > with using a LCD with my BS2sx but I can't find any cheap serial
    > LCD's (for less then $40). ·I found plenty of parallel LCD's but I
    > am not sure how to hook these up to the stamp.

    Takes a minimum of six pins to do a simple but functional parallel
    connection to a HD44780-compatible LCD.

    > If I buy a parallel LCD do I need to buy one of those extra
    > controller boards (one place was selling one as an LCD Backpack)?

    No...assuming you get a HD44780-compatible LCD.

    > ·I'm looking for the cheapest route possible.

    That would be a parallel connection to a ~$10 or less, surplus or
    pulled LCD from someplace like BG Micro (www.bgmicro.com). ·There are
    plenty of coding examples available and help from folks on this list
    to help you should you choose to go this route.



    If you really get into a bind with I/O count and can't buy a backback module,
    I've interfaced an LCD with just three wires through ·74HC595 shift register
    (about $1) -- kind of a poor man's backpack. ·It takes just a little more
    code than standard (6 line) interfacing.

    -- Jon Williams
    -- Dallas, TX[/font]
  • ArchiverArchiver Posts: 46,084
    edited 2001-02-01 01:42
    Thanks, I guess it never really clicked in my head to check the
    text. I kept looking at the kit wondering why it came with only a
    regular BS2 but a parallel LCD.

    /tim/

    --- In basicstamps@y..., jonwms@a... wrote:
    > In a message dated 1/30/01 9:27:06 PM Central Standard Time,
    > t_i_m@h... writes:
    >
    >
    > > Newbie has a question about LCD's. I would like to toy around
    with
    > > using a LCD with my BS2sx but I can't find any cheap serial LCD's
    > > (for less then $40). I found plenty of parallel LCD's but I am
    not
    > > sure how to hook these up to the stamp. If I buy a parallel LCD
    do I
    > > need to buy one of those extra controller boards (one place was
    > > selling one as an LCD Backpack)? I'm looking for the cheapest
    route
    > >
    >
    > The StampWorks manual (available for download at
    www.parallaxinc.com) has a
    > whole section on connecting Stamps to a parallel LCD.
    >
    > -- Jon Williams
    > -- Dallas, TX
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