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Thread: A good alternative to TV monitor ?

  1. #1

    Default A good alternative to TV monitor ?

    Hi, i would like to show you what i have managed to use as a tv-monitor.
    The screen is 2.5" and it costs $10 + $5 shipping to continental US.

    These are spare parts left from a big bunch of nightvision cameras, and he has many of them.
    If anyone interested, PM and i will give full details. If an order reaches $50 he will shipp at his expences.

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    images-team.ro

    Post Edited (mugur) : 3/5/2010 10:48:11 AM GMT
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  2. #2

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    Yes, security monitors generally display standard video. Used ones are cheap, new ones are not.

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    I should be typing in Spin now.
    Coming soon. My open Propeller Project Pages and favorite links index.
    Last edited by ForumTools; 09-30-2010 at 09:14 PM. Reason: Forum Migration

  3. #3

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    Even though this screens are not security monitors, i am quite sure you are generally right. The night vision devices this monitors were used into were for "civil" purpose like animal watching etc. The military/security ones have quite a bunch of differences.

    P.S. All these screens are new, unused.

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    images-team.ro

    Post Edited (mugur) : 2/17/2010 9:41:37 AM GMT
    Last edited by ForumTools; 09-30-2010 at 09:14 PM. Reason: Forum Migration

  4. #4

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    Here's a photo of one disassembled and hooked to a Composite Video source. On the left is the LCD Controller Board that is powered from 12V DC and accepts Composite Video input, on the right is the 2.5" LCD itself.

    I have a good amount of information to share about the LCD Controller and the LCD itself. There's a bit of soldering and work to make it work this way so you can'tcompletely consider it plug-n-play. However, it seems to be well within the ability of anyone who's half-handy.

    They're cheap and plentiful and there's a person or two who can give advice on hooking them up if you need it.

    They also have some other features that can be explored like the potential for RGB input and flipping the image horizontally and vertically as I recall. I've got a modest amount of knowledge about these and datasheets for components that are virtually identical. (I don't have the exact datasheets for the exact components.)
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    Last edited by ForumTools; 09-30-2010 at 09:14 PM. Reason: Forum Migration

  5. #5

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    Glad to see you here Mark.
    The soldering Mark is talking about are exactly 2. One for the 12V wire and one for the video signal. And eventually a 5K pot to control the contrast but it is not needed as you can see in the pictures.

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    images-team.ro
    Last edited by ForumTools; 09-30-2010 at 09:14 PM. Reason: Forum Migration

  6. #6

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    FOR SALE: 2.5" Color LCD Video Display System$10 Each (plus shipping)

    DOZENS still available! (You can be sure I will edit this message to indicate when they are no longer available!)

    I have dozens ofthe Color LCD Display systems originally used for NiteMax night-vision cameras. (See attached photos) They're allNEW but they're a few years old and they've been shuffled around and spent lots of time in storage.

    I can sell them for $10 each plus the cost of shipping via Postal Service Priority Mail. $10 gets you one complete bundle of parts that includes the 2.5" Color LCD, an LCD Controller and the partial plastic housing with various bits and peices asshown. You provide 12V DC and a Composite Video Signal and carefully figure outhow to hookup it up and the result is a tiny little video monitor.

    I can ship ONE or TWO for $4.95 to any Zipcode in the USA. (ONE would then be $14.95 total and TWO would then be $24.95 total.) Additional items beyond two will be based on the actual postage between my Zipcode and yours. Buy FIVE or more and I'll pay for the postage myself. (FIVE would then be $50 total.)Buy TEN or more and we can work out an ever bigger discount!

    I can accept PayPal and I'm willing to work with you if you prefer another payment method. I can also provide references if you're not too sure about buying these from a complete stranger. I can also ship outside the United States but you'll need to work with me to determine the actual cost of shipping.I can't guarantee I'll be able to ship them exactly "anywhere" but I'll do what I can to accommodate your request.Additional Taxes or Duties are the responsibility of the buyer.

    My personal policy is to stand behind anything I sell. If you're not completely satisfied, please let me know. I'll do whatever I can tomake sure you'recompletely happy with your purchase including replacing anything you recieve defective or refunding your purchasepriceif you decide to return everything.

    These are guaranteed to work when you get them and for at least 30 days. Beyond that there's no formal warranty but you should contact me anyway if you have questions, concerns or problems.I'll do as much as I can to assure your complete satisfaction in a way that's fair for you and reasonable for me -- now or in the future.

    Please send me a Private Message if you're interested.

    If you have technical questions about these LCD Displays, please post them here so they can be answered publicly for the benefit of anyone else who may have similar questions.

    - Mark


    Post Edited (NiteMax Mark) : 3/3/2010 4:30:59 PM GMT
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    Last edited by ForumTools; 09-30-2010 at 09:14 PM. Reason: Forum Migration

  7. #7

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    Do you have a Propeller Demo Board? If you do, could you post a screen shot using Graphics_Demo.spin?

    Thanks,
    Jim

    Post Edited (hover1) : 2/25/2010 3:42:54 PM GMT
    Last edited by ForumTools; 09-30-2010 at 09:14 PM. Reason: Forum Migration

  8. #8

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    Jim, i will do this for you this weekend.

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    images-team.ro
    Last edited by ForumTools; 09-30-2010 at 09:14 PM. Reason: Forum Migration

  9. #9

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    Mark, i have used a text code,
    i will run the graphics one and post the result.

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    images-team.ro
    Last edited by ForumTools; 09-30-2010 at 09:14 PM. Reason: Forum Migration

  10. #10

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    Thanks!
    Last edited by ForumTools; 09-30-2010 at 09:14 PM. Reason: Forum Migration

  11. #11

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    DANGER!

    Hopefully I have your attention now...

    There's a couple of things everyone should be aware of to avoid trouble. (I have learned these from painful first-hand experience!)

    1) HIGH VOLTAGE
    The "High Voltage" decal you see in the attached photo is FOR REAL! The LCD uses a CCFL (Cold-Cathode Fluorescent Lamp) backlight which isvirtually justa miniature fluorescent bulb. If you touch the Printed Circuit Board in the cornernear the "QC" or "OK" on the High Voltage Label (See the photo) you WILL get a shock!

    The odds are good that you'll be okay. And, chances are, nothing will be damaged and nobody will get hurt. But, it WILL get your attention and you WILL tell yourself "...don't do that again!" If you're dripping wet or you're foolish enough to experiment with these kinds of things in the bathtub, I imagine the outcome might not beas favorable.

    The truth is thatit's actually pretty difficult to touch the Circuit Board in thatsmall little corner where there's High Voltage and everything else seems to be pretty well insulated, but it's still best to avoid handling the LCD Controller when power is applied. If you are brave (and stupid) like me, you'll handle it while its powered a bunch of times without any drama. Eventually you'llforget what you're doing andyou'll grab the wrong corner without thinking and get a shock when you least expect it. Don't say I didn't warn you! The label is there for a good reason!


    2) The POWER WIRES YOU SEE don't work like you think!
    The RED and BLACK wires you see in the photo sure LOOK like power supply wires and you've got the right idea. However, if you study how they're hooked up in the circuit you'll find a couple interesting (and unfortunate) things.

    For starters, they're wired ACROSS the switch which means that turning ON the switch will place a SHORT CIRCUIT across your Power Supply! At the very least it won't work and nothinguseful will happen. But, you might see smoke and you might ruin your power supply or you might not see anything at all. Of the things that MIGHT happen, the LCD turning "on" isn't one of them. In fact, those convenient looking Power Supply Wires aren't even connected in a way that can get power delivered to the LCD Controller AT ALL!

    The best you can hope to do with the red and black Power Supply wires is to de-solder them from the switch and re-wire them in a way you can use them. In reality, you probably won't end up using those wires at all.

    DANGER!


    Post Edited (NiteMax Mark) : 2/25/2010 8:04:27 PM GMT
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    Last edited by ForumTools; 09-30-2010 at 09:14 PM. Reason: Forum Migration

  12. #12

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    Hi Mark
    Do you have some data, PDF, txt file or scheme for the LCD monitors?
    What is the model names and Nr?

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    At the end, everything will became Electron...!
    Last edited by ForumTools; 09-30-2010 at 09:14 PM. Reason: Forum Migration

  13. #13

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    electrosys said...

    ...
    Do you have some data, PDF, txt file or scheme for the LCD monitors?
    What is the model names and Nr?



    Unfortunately, I don't have exactly the datasheets for any of this stuff. Over time I have collected information from sources that is very similar and helpful when used carefully. I don't have a schematic for any of these things but I have some good clues.


    For example, I've attached a data sheet for a 5.6" LCD that happens to use the exact LCD Controller. As long as you expect some of the differences the information is still valuable.



    I have alsoattached another datasheet for the LCD itself that is neraly identical to the one in the NiteMax. Again, the data sheet is not necessarly the exact one bitis still very valuable if youkeep an eye out for potentialdifferences.



    I also have data sheets for for some of the main chips on the LCD Controller Board. These show typical application circuits that are often the same as the LCD Controller and they have proven very helpful too. I don't expect to attach the IC data sheets unless there is lots of demand for them.



    If someone wants to reverse-engineer one of these and publish a schematic based on the clues I've collected, I'm sure lots of people would be grateful.

    Post Edited (NiteMax Mark) : 2/26/2010 2:14:44 AM GMT
    Attached Files Attached Files
    Last edited by ForumTools; 09-30-2010 at 09:14 PM. Reason: Forum Migration

  14. #14

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    Great thank you Mark

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    At the end, everything will became Electron...!
    Last edited by ForumTools; 09-30-2010 at 09:14 PM. Reason: Forum Migration

  15. #15

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    Some questions answered about the RCA Jack, 9V DC Jack, Pushbuttons and "Off/On" Switch...


    REMEMBER: The "Off/On" SwitchCAN NOT BE USED the way it is currently wired!

    There's another message posted here with DANGER in big red letters explaining the unfortunate details of the "Off/On" Switch!


    RCA Jack "Video Out" or is it Video In?

    Inside the(originally complete) NiteMaxcamerathere hadbeena Video Camera Board that accepted 12v DC and created a Composite Video Signal. Thiswas then connected to the input of the LCD Controller Board. The RCA Video Jack you seewas connected between the two so that an external device canintercept the video output from the CCD Camera Boardand display the image that theLCD Controller did.

    With the CCD Camera Board gone, you still have the RCA jack connected to the LCD Controller. Since the LCD Controller board has no clue where the video signal comes from, and the RCA Jack doesn't know anything about "in" or "out", you can connect your video signal here and it all works out fine. In this way, "Video Out" can now be used as "Video In" and it all works out perfectly!


    "DC In 9V" or is it 12V DC?

    Inside the(originally complete) NiteMaxcamerathere hadbeena Power Supply Board that boosted 9V DC up to 12V DC. With the Power Supply Board GONE in these, the "Off/On" Switch, Push Buttons and "DC In 9V" connection aren't used.

    You could re-wire everything to make use of the "Off/On" Switch,"Video Out"Jack and even the "DC In 9V" connectors if you like! In the case of the "Video Out" connector and the "DC In 9V" you'll have to find a way to re-label them so they make sense.


    "LCD", "Gain" and "IR" Buttons?

    Inside the(originally complete) NiteMaxcamerathere hadbeena Power Supply Board with a digital potentiometer that adjusted the LCD Contrast based on pushes from the "LCD" Buttons. There was another Digital Potentiometer that adjusted the output of another Power Supply to vary the brightness of the original IR LEDs. As I recall, the "Gain" button did something to the Brightness input on the LCD Controller Board.

    If you really wanted to be clever, you could find a way to make these buttons control the inputs to the LCD Controller Board again.It seems like a lot of work for not much benefit.

    Post Edited (NiteMax Mark) : 3/3/2010 4:35:40 PM GMT
    Last edited by ForumTools; 09-30-2010 at 09:14 PM. Reason: Forum Migration

  16. #16

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    THANK YOU to all that have placed orders.

    Some of the first shipments have already reached Forum members including at least one International shipment!

    I encourage everyone to post questions and comments here including the results of anything you've done with the displays. I'd love to see photos showing how you've put them to good use!

    I encourage anyone to contact me if you have issues or concerns regarding the items you've received. I'm dead-serious when I say that myfirst priorityis to be sure you're completely satisfied with your purchase.

    While the response has NOT been overwhelming, there HAS been plenty of interest. It deserves to be said that this is just a hobby for me and not a full-time job butI stilldo my best to be very responsive to EVERYONE. I like to ship everything the SAME DAY as your order and (regretfully) the NEXT DAY if I'm busy at home or work or something.

    If youend upwaiting on me for more than 24 Hours for ANYTHING, please don't hesitate to drop me a note and see what the problem is. I promise I won't be offended and I won't complain that you're being impatient. In fact, a friendly reminder is the best way of making sure I don't lose track of you by accident.

    - Mark
    Last edited by ForumTools; 09-30-2010 at 09:14 PM. Reason: Forum Migration

  17. #17

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    Any screen shots yet? Just wanted to see how it looks from demo board output before I commit. mugur promised some pics on 2/25/2010.

    Thanks,
    Jim
    Last edited by ForumTools; 09-30-2010 at 09:14 PM. Reason: Forum Migration

  18. #18

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    True. Due to my family problems, i have no chance to get back to my hobby untill saturday.

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    images-team.ro
    Last edited by ForumTools; 09-30-2010 at 09:14 PM. Reason: Forum Migration

  19. #19

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    Understand. Family is always first.

    Jim

    mugur said...
    True. Due to my family problems, i have no chance to get back to my hobby untill saturday.

    Last edited by ForumTools; 09-30-2010 at 09:14 PM. Reason: Forum Migration

  20. #20

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    If some known parallax prop users have these monitors, how about a review?

    humanoido
    Last edited by ForumTools; 09-30-2010 at 09:14 PM. Reason: Forum Migration

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