Print

[Chad N.]

I think the reason a lot of monitors are not working with the 720P and 1080i resolutions, is that the monitors do not support the 16:9 aspect ratio.

Many monitors can handle high resolutions.  They just don't know what to do with a resolution in a 16:9 format.  They were only designed to have a 4:3 input.

And yes, I know if you watch a movie on your PC in a 16:9 format, the monitor displays it.  However, the video card is actually outputting a 4:3 signal with black bars at the top and bottom.

[Foe-hammer]

QUOTE(Chad N. @ Nov 1 2005, 09:14 PM)

I think the reason a lot of monitors are not working with the 720P and 1080i resolutions, is that the monitors do not support the 16:9 aspect ratio.

[BBABBA76]

QUOTE(Chad N. @ Nov 2 2005, 06:14 AM)

I think the reason a lot of monitors are not working with the 720P and 1080i resolutions, is that the monitors do not support the 16:9 aspect ratio.

[Chad N.]

QUOTE(Foe-hammer @ Nov 3 2005, 01:42 AM)

[DarkLegion]

My 1989 14" Mitsubishi monitor which only barely does 800x600 (but syncs down to 480i), can handle 1080i The odd resolution could certainly confuse some monitors if they are not good at handling non standard resolutions and syncs i.e a "picky" monitor.It could also be because of the the tri-level sync in 720p/1080i which usually results in a purple image but a "picky" monitor might reject it entirely because of the positive going pulses.

[Foe-hammer]

QUOTE(BBABBA76 @ Nov 3 2005, 05:35 AM)

Then why I succeed to view a DVD video in 480p with black bars at the top and bottom with DVDRegionX patched?

[Textbook]

Bumping this because I think it's a cool project.  I may end up doing this if I could just get new, updated, clear schematics.  That's all I'm asking.  There is a lot of talk on here about the Max 4383 and the LMH1251 ICs, but these are not shown in Ken Gasper's Schematic.  If anybody has a newer schematic, using the updated ICs, I would highly appreciate a reply to this topic, a friendly PM, or an email.  I will even host them for everybody to see.

[b u L L]

I'm hoping somebody can post a link to Gasper's schematic, also.

I may just end up buying one, but I'd still like to try building one just for fun.

[thecowsays]

i have the scematics for those who want em
send an email to [email protected] and pm me so i know to check that email address
ill send em to whoever or if somebody wants to host em that works too

[thecowsays]

so i emailed the schematics to textbook and hes going to host them.  its pretty involved and would be easiest if somebody had a custom pcb made.  I got it all put together but it didnt work. but i just looked at it again and some of my soldering is shitty, and i didnt really try to get it to work.
heres a part list (all are 1%)
resistors (ohms):
1.02k x 1
698 x 1
2k x 3
511 x 1
75 x 3
931 x 1
1.78k x 1
1.3k x 1
2.8k x 1
1.05k x 1
549 x 1
442 x 1
5.76k x 1
86.6 x 1
80.6 x 2
4.99k x 4
340k x 1 ?
887 x 1
10 x 2
680k x 1 ?

capacitors
0.1uF x 4
330 pF x 1

chips:
max4383
LM1881

everything is available at mouser.com and you can get the chips for free by requesting a free sample from the manufacturer

edit:
looking back at page 2 there are some good links, also the 340k resistor may need to be replaced by the 680k, id say order both and give it a try.

[Textbook]

And here is the link to the updated schematics that I have been waiting for for so long.  Thanks to thecowsays.  Hope everybody can now have a chance to try out these updated schematics, as they look a lot better than the old ones.  And a lot easier too.  So click here, start ordering, and start soldering.  I know I will try this when I get a chance.  Hopefully somebody will get this to work.  Click, Click.

[thecowsays]

this is getting to be more expensive than i thought.
found everything on mouser.com
most resistors are available as 1/4 watt 1% i had to get a couple as 1/8 watt which are quite a bit more expensive or have to be bought in quatities of hundreds.  
you can do surface mount, but they are a pain to work with, but are also pretty cheap.
the capacitors are only available as 5% unless you want to buy a couple hundred at over a dollar apiece
anyway parts with extras were $5.91 shipping is $5.85 im going to get the adapter on page 2 of this post which ends up being $7.80 after shipping. All of that stuff is just under $20. I got the chips for free and i have yet to order the vga plug and the board, neither of which are expensive. Looking on radio shack and mouser, the board will be $2-3 and the vga plug will be $2.20 -> here
so total parts ends up under $25.

[Textbook]

Hey, just got a question about a couple connectors.  I was wondering if there is anything specific about Component connectors/jacks, or are they the same as RCA/Composite.  I would like to buy a 3-plug connector that could be soldered onto the board so that this could be used with more than just my Xbox.  Anybody know where to find one of them?  Besides ripping it off of an old TV.  I think it's labeled as HEADER6 in the schematic.

[thecowsays]

so i realized that the vga plug i linked to in my previous post is out of stock and wont be in for 10 weeks
here is a new one.
textbook: rca = phono = component = composite as far as the plug itself is concerned. if you want the right colors for component you have a long search ahead of you. i found em somewhere but for some reason its hard ot find red/green/blue rca jacks. it was probably close to 2 years ago, so i forget where i got em, sorry i cant be of more help, but theyre out there somewhere!

[Elite786]

Hi guys, did anyone successfully build the circuit and get it to work?

ive just gone out and bought the lm1881n and then after 20hours of extra reading i found this thread.

tthings look optomistic judging by the response.

Thanks to everyone been helping out with the project.