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Thread: CRT to LCD Conversion Project

  1. #11
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    Thanks for the interest chaps, here's hoping it all goes to plan...

    Quote Originally Posted by roy_bates View Post
    you want to be careful of implosion,when heating crt's
    ...and that's an important point - my usual safety precaution when I try something risky is to wait until my better half is out of the house.
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  2. #12
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    I think I mentioned I may take some time over this one...

    Perspex has arrived, yay!

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    Euro IIe spruced up and waiting on enhanced kit to arrive - I wasn't going to bother for this one but as the Video ROM seems FUBAR and I got a good price:

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    Retr0Brite day 3... For those of you who don't live in Hades that's British weather for you:

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    ...I don't even tend to go for a 'new' shade. It's usually a shade or two before that I stop. Still, if all goes to plan I'll do the old plastic bending tomorrow & post the results - hopefully good rather than bad!
    Last edited by Charlie; 11th March 2018 at 12:13.
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  3. #13
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    Another quick update:

    The Monitor plastics are out in the 'sun' for yet another day, here's hoping that will do. In the meantime I've had a most helpful discussion with an eBay seller from China. It seems if I want a driver board that includes composite my options are pretty limited, so I've bought this one:

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    And if I go with the above driver board then I'm pretty well stuck with a 1024x768 panel at 9.7" so I bought this one (basically what goes in to an iPad 1/2):

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    This one's from an HP Tablet


    This will be more than good enough for my needs, and is probably exactly what I should be going for. A higher resolution panel would have been nice, if actually less practicably useful, but the available driver boards don't have older connectors so that means daisy-chaining an adaptor board with more complication, more (complicated) set up and likely two sets of control switches to drill - no thanks!
    I couldn't quite work out from conversation if the board I've bought has audio out, it would be good to have an easy way to integrate speakers, but as it has HDMI in and a bunch of cryptically labelled headers I'm hopeful there's a solution in there somewhere.

    More anon...
    Last edited by Charlie; 11th March 2018 at 13:39.
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    Oh, well...

    First attempt was a failure:
    -Perspex scored and snapped to size
    Hah! Score it and then a sharp blow to snap it - a good way to get bruises if you ask me. Score and then just bend it in your hands until it snaps
    -The perspex came out of the oven a bit bubbly - too much heat too quickly I suppose
    So I gave it a trial run anyway...
    -I can see the Tube is going to have to be pretty hot to get a good fit

    Ho-hum... Time to order some more perspex and have another go. I had a feeling this 'simple' plan might prove to be more of a journey of discovery.

    I think the next try is going to be one of the following:
    -Lay perspex cold on to tube and take my time with a hot air gun - that could be really boring!
    -Bung the tube in the oven with the perspex balanced on top, and slowly bring the heat up until the perspex sags over the tube...

    ...I wonder how much heat a CRT tube will take before it goes BANG!!! Bets..?
    Last edited by Charlie; 12th March 2018 at 17:44.
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    Well, that's a new one! You never mentioned (i think) about an oven. Should there be a bang, prepare yourself for a second bang by the Mrs!
    I recall the arguments of re-flowing some cards in the oven... at least that was a success story (technically speaking). My friend, patience is a virtue as we all know; do yourself a favor, and pull the trigger on that heat gun!

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    You're probably right... more perspex on the way, so fingers crossed.

    On the subject of re-flowing stuff in the oven I've actually had a fair degree of success with that one, although I've often ended up with some slightly charred connectors.
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    I don't think a CRT tube would explode from the heat required to get the Plexiglas to sag. It's glass and it has a vacuum inside, so no reason to explode (until you accidentally knock the neck against the side of the oven!!).

    Bryce.

  8. #18
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    Quote Originally Posted by Bryce View Post
    I don't think a CRT tube would explode from the heat required to get the Plexiglas to sag. It's glass and it has a vacuum inside, so no reason to explode (until you accidentally knock the neck against the side of the oven!!).

    Bryce.
    Yep, that's my understanding too, implode would be more correct. Still, I bought two sheets this time... One to balance on to of the tube for the whole lot to go in the oven, and a backup in case I have to resort to a heat gun.
    Last edited by Charlie; 14th March 2018 at 15:16.
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    I don't think a heatgun will work because it will heat the surface unevenly and cause stress in material which will mess things up.

    Bryce.

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    A 9 inch panel is not that big of a surface, so i think it will heat up pretty quick with a heat gun. Nevertheless, if you decide to 'bake the tube', i believe you should make sure it's sitting upright, meaning the looking glass should face upwards. And rock-steady of course!

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