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LCD AppMod — Parallax Forums

LCD AppMod

CenlasoftCenlasoft Posts: 265
edited 2010-10-15 21:49 in Propeller 1
Hello,
A few years ago, I ordered from Parallax the LCD AppMod for the BSII series. www.parallax.com/StoreSearchResults/tabid/768/txtSearch/lcd/List/0/SortField/4/ProductID/53/Default.aspx

Is there any object that I can modify to use this LCD? I am looking through the OBEX and I can't find any one for this LCD. I want to also use the four buttons on it for a project. Any help would be appreciated.
Curtis

Comments

  • JonnyMacJonnyMac Posts: 9,208
    edited 2010-06-28 16:20
    This is my 4-bit LCD object -- should work with no issues as I define pins in the same order as they connect to the AppMod.
    -- obex.parallax.com/objects/474/

    You'll have to add your own button support, but that will be very easy (make the pins inputs, read them, set them back).

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Jon McPhalen
    Hollywood, CA
  • CenlasoftCenlasoft Posts: 265
    edited 2010-06-28 16:52
    Thanks Jon,
    I'll work on it today.
    Curtis
  • CenlasoftCenlasoft Posts: 265
    edited 2010-06-28 19:34
    Hey Jon or anyone,
    I succeeded in using a prop object to interface the LCD AppMod as suggested by Jon. I like these small LCDs and I was wondering if the following product would work the same:
    www.411techsystems.com/html/ssc2f08dlny-e.html

    Thanks for your help,
    Curtis
  • JonnyMacJonnyMac Posts: 9,208
    edited 2010-06-28 21:24
    Yes, it will work -- you just have to make the connections. This article may help:
    -- www.parallax.com/Portals/0/Downloads/docs/cols/nv/prop/col/nvp2.pdf

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Jon McPhalen
    Hollywood, CA
  • DynamoBenDynamoBen Posts: 366
    edited 2010-06-28 22:31
    I actually made an LCD AppMod object for a project I was working on, beware its designed to work at 5V not 3.3V. I ended up having to remove the provided SIPs and swapping them with values more appropriate for 3.3V operation.

    Enjoy and let me know about changes or improvements.

    Post Edited (DynamoBen) : 6/28/2010 10:36:53 PM GMT
    spin
    spin
    LCD_Terminal.spin
    44K
  • John KauffmanJohn Kauffman Posts: 653
    edited 2010-10-15 21:46
    Confirming connections:
    I wanted to check on connections for the LCD Terminal AppMod (#29121) to the Propeller Education Kit with PropStick USB. I am confused how the AppMod header pins for Vin and Vdd translate to the Propeller Education Kit. On a Board of Education the Vin would be 6-9 v and the Vdd would be 5 v. I think the options on the Prop Education Kit are only 5 and 3.3 v.

    For the data I intend to use objects jm_lcd4_ez or BenkyLCDdriver and then try to develop a sensor PUB for the buttons.

    LCD APP Mod - PropStick - function
    Vdd - ??? red rail / PropStick pin 32 - (3.3 v)
    Vin - ??? PropStick pin 12 - (5 v)
    Vss - Black rail / PropStick pin - 29 (ground)
    Data 0 - Prop Pin 0
    ...
    Data 7 - Prop Pin 7

    Thanks.
  • John KauffmanJohn Kauffman Posts: 653
    edited 2010-10-15 21:49
    Forgot - do I need resistors between LCD Terminal App Mod data pins and PropStick USB data pins?

    I don't see any resistors in the schematic for the Board of Education between the AppMod header and the STAMP pins, so I am thinking that resistors are not needed.

    I tried the LCD Terminal it on a Homework board, but that has built-in resistors between pin header and stamp.

    I could not find a schematic for the LCD terminal itself and I can not discern visually if there are resistors under the screen.

    thanks.
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