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Author Topic: Composite Video Generating  (Read 6685 times)
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Colors:


* DSC00488.JPG (47.23 KB, 640x480 - viewed 48 times.)

* DSC00489.JPG (48.55 KB, 640x480 - viewed 39 times.)
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Yes really impressiv work.
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Yes really impressiv work.
Thanks! It will even become better when I change the resistors of my R2R ladder. They're a bit too high, so that's why the pictures are a bit dark. Here is another picture:


* DSC00491.JPG (68.06 KB, 640x480 - viewed 79 times.)
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NSMBU worldmap (aka little details):


* DSC00508.JPG (73.9 KB, 640x480 - viewed 67 times.)
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I just tested on a real tv, and it looks very nice! No color errors and such. Keep in mind that it works with a framebuffer, so you can draw on it in runtime. And you can use every color you want!
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I've added a video op-amp, and the brightness is much better now.


* DSC00524.JPG (80.83 KB, 640x480 - viewed 87 times.)
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I made the wss working again:


* DSC00547.JPG (60.73 KB, 640x360 - viewed 65 times.)
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Another widescreen picture in the right proportions:


* DSC00549.JPG (58.08 KB, 640x360 - viewed 60 times.)
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Proof of concept video:

(please subscribe)
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This is so cool, well done!

I would love to see some more information about wiring etc.
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This is so cool, well done!

I would love to see some more information about wiring etc.
Thanks!
It is a r2r ladder (kind of) and a video op-amp (which you can get for free). That's it.
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I have started working on this a few days ago, and the video op-amp is not needed anymore now. It turned out that the the voltage ratios were not correct. I fixed it, and in combination with a new and better r2r ladder, it works much better. I also switched from 8 to 5 bits, cause that's just more suitable for a 1% r2r ladder.

There are still some color phase errors, but since pal uses phase alternation, those errors are not much noticable.


* a.png (192.87 KB, 720x576 - viewed 59 times.)

* b.png (178.82 KB, 720x576 - viewed 54 times.)
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Hi There.
I just got myself an Arduino due today and thought what better way to try it out then with your cool graphics smiley
Do you have a library ? or any code I can run. Possibly a circuit diagram if it's not to much trouble of course.
You did a fantastic job on your project, well done
Thanks
BlackSnake
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Hi There.
I just got myself an Arduino due today and thought what better way to try it out then with your cool graphics smiley
Do you have a library ? or any code I can run. Possibly a circuit diagram if it's not to much trouble of course.
You did a fantastic job on your project, well done
Thanks
BlackSnake
Thanks, I have a sketch you can run (it consists out of multiple files) and I will make a schematic. I will do this when I have time to do so.
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Any update on your code and wiring? I'd love to try this!

Gr. Uit Amsterdam
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