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LCD -- 8 rows x 21 cols; serial. Photos! — Parallax Forums

LCD -- 8 rows x 21 cols; serial. Photos!

PJAllenPJAllen BannedPosts: 5,065
edited 2006-04-23 00:29 in General Discussion
Saw these at ebay, LCDs, 8 rows (lines) x 21 columns [noparse][[/noparse]for 168 characters] --

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7594533325&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1

Post Edited (PJ Allen) : 4/22/2006 8:51:07 PM GMT

Comments

  • GadgetmanGadgetman Posts: 2,436
    edited 2006-03-20 20:59
    Looks interesting, and according to the blurb, it can run at 3V, so should be directly compatible with the Propeller, but...

    I can't make out the SIZE of the LCD. And without that, well...

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  • PJAllenPJAllen Banned Posts: 5,065
    edited 2006-03-20 21:22
    · There's a mechanical drawing, shows the display/glass as 34.5 x 66 mm (appx 1.38 x 2.6 in.)· The character area is about 29 x 59 mm.
    ·
    · (I think the connector at the top is 0.1in spacing, you could judge against that, too.)
  • PJAllenPJAllen Banned Posts: 5,065
    edited 2006-04-16 19:29
    · I got my displays a few weeks ago.
    · Finally found the time to put together the LCD serial backpack for it.· They send you the components and a protoboard (it's NOT a pcb.)· Instead of their grid-holes protoboard, I Dremel'd out a piece of IC-pattern board.
    · I'll have to see if I can borrow a friend's camera (my video-stills are too fuzzy for this.)
    · In the meantime, here's a program that I made to check·it out.
    · I found on my own that the sequences for DISPLAY CLEAR and envoking NORMAL or REVERSE display modes need a PAUSE before going on with Text functions (when all else fails, start placing PAUSEs between instructions.)
    · Another thing I need to find out is which of the two pins connected to +5V is for the LED backlight.
    · [noparse][[/noparse]By the way, on my backpack·I set up a 78L05,·and so·power it from "VIN"and not VDD.· If not for the backlight VDD might suffice, but I'd probably do it this way anyway.]
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  • PJAllenPJAllen Banned Posts: 5,065
    edited 2006-04-22 20:50
    Here some pictures of the LCD and one of the "backpack".
    mfs01.JPG
    640 x 480 - 119K
    mfs02.JPG
    640 x 480 - 114K
    mfs03.JPG
    640 x 480 - 112K
    mfs_sbp.JPG
    640 x 480 - 104K
  • Eric REric R Posts: 225
    edited 2006-04-22 22:18
    Good job, that looks nice!

    BTW, that vise in the picture, I think that is one thing no one can be without. Did you get the PCB holder for it?
  • PJAllenPJAllen Banned Posts: 5,065
    edited 2006-04-22 22:32
    Eric R. -- Actually, the vise itself can't be seen, but it is a "PV-Jr." mounted to the Panavise tray.· I used the Dremel to modify the clamp (or whatever you call it) by cutting some pcb-width channels in it for boards to fit into.· It has a few angled cut-outs as is (for holding dowels, probably), but making the pcb-channels made it tweak.· I mostly do little boards, typically the size of the backpack, so I clamp 'em up and then spin 'em around as necessary.
  • BeanBean Posts: 8,129
    edited 2006-04-22 23:58
    PJ is that LCD graphical ? Or can you only put text on it ?
    Bean

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    "SX-Video OSD module"·available·for only·$49.95·www.sxvm.com
    Available now! Cheap 4-digit LED display with driver IC·www.hc4led.com

    "I reject your reality, and substitute my own." Mythbusters
    ·
  • PJAllenPJAllen Banned Posts: 5,065
    edited 2006-04-23 00:29
    Bean -- The serial backpack only knocks out characters (the standards, all the IBM keyboard and a bunch of the others with a dieresis and other accent marks.)· If you take a look at the ebay page on the·initial post.·the seller has a sheet of the "op codes", so it may be that one could actually pixel-bang it, but no further information past that.
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