3.5" DX screen hacking information

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vskid
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Re: 3.5" DX screen hacking information

Post by vskid » Sat Sep 26, 2009 9:16 am

Life of Brian wrote:If you saw a 7805 on your screen's circuit board, shouldn't that be clear enough evidence that 5v won't be enough to operate your screen?
If the 7805 is bypassed, it may work with 5v. I have a screen that worked when I did that, it just made the CCFL backlight go screwy (so I LED modded it).
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Re: 3.5" DX screen hacking information

Post by 64M320N3 » Sat Sep 26, 2009 9:17 am

LED modding time! :wink:
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Re: 3.5" DX screen hacking information

Post by Valium » Sat Sep 26, 2009 1:59 pm

Life of Brian wrote:I apologize if that came off as harsh - I intended no malice toward you, I just wanted to make sure I was being really clear.

Also, do you really need a picture of a 7805? Hasn't that been discussed enough on these forums? If you saw a 7805 on your screen's circuit board, shouldn't that be clear enough evidence that 5v won't be enough to operate your screen?
I need a picture because mine doesn't have one. I wanted to know if you have a different revision or model; something like that.
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Re: 3.5" DX screen hacking information

Post by schmellyfart » Sun Sep 27, 2009 12:15 pm

Source :D
schmellyfart wrote:Ok I have some good news on this 3.5" deal extreme screen It looks pretty good in my opinion.
+Draws 300ma under a load. (240ma standby)
+Should run on anything between 5v and 12v. I have confirmed that it runs on 7.2v and 5v though.
+LED backlit!
+PCB is the same size as the LCD One thing i noticed is when I played a Dvd (after playing mk64 and GH :lol:), the letters at the menu screen were a little fuzzy on the edges.

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Re: 3.5" DX screen hacking information

Post by marshallh » Tue Sep 29, 2009 12:07 pm

This screen contains a 8051 derivative microcontroller (probably for setting up brightness/contrast parameters with the video decoder)
http://www.stk.com.tw/driver/Microc/Dat ... 209%29.pdf" onclick="window.open(this.href);return false;

The video decoder (TW9910 techwell)
http://www.techwellinc.com/products/bro ... TW9910.pdf" onclick="window.open(this.href);return false;
http://lists.zerezo.com/video4linux/pdfPOM35SpYDv.pdf" onclick="window.open(this.href);return false;

Looking forward to hacking it up :D


edit: All N64 games I've tried don't work, the screen rolls :(
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Re: 3.5" DX screen hacking information

Post by 64M320N3 » Wed Sep 30, 2009 10:49 pm

marshallh wrote:edit: All N64 games I've tried don't work, the screen rolls :(
God damn it! Is this the same problem with the AEI comp screen?
Making stuff with my new beautiful CNC machine!
Would you like a professional looking custom case for your portable? I may be able to help you. Check out this link:
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Re: 3.5" DX screen hacking information

Post by Zeturi » Sat Nov 28, 2009 9:42 pm

It doesn't work with the Genesis, either... :cry:
If you're getting 404'd when trying to use the links in stickies, try this tutorial to find that juicy info.

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Re: 3.5" DX screen hacking information

Post by joeyjoe9876 » Sat Nov 28, 2009 9:49 pm

didn't work with any NES games when i tested it :?
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Re: 3.5" DX screen hacking information

Post by hailrazer » Sat Nov 28, 2009 9:59 pm

Yea the 3.5" that I tested is much better, works with every system. It is $10 more on Ebay but it is worth it.

http://www.dealextreme.com/details.dx/sku.20415" onclick="window.open(this.href);return false;
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Re: 3.5" DX screen hacking information

Post by joeyjoe9876 » Sat Nov 28, 2009 10:47 pm

yeah this screen seems to work with anything dreamcast and up :/
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Re: 3.5" DX screen hacking information

Post by hailrazer » Mon Nov 30, 2009 3:23 pm

Oh yea, I found out that the video ground on these Hong Kong monitors have to be hooked up to the battery ground.

I wonder if that is the problem with the rolling screen on all the 3.5" screens ?
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Re: 3.5" DX screen hacking information

Post by joeyjoe9876 » Mon Nov 30, 2009 4:44 pm

LOL and i already bonodo'ed my gamecube controler in...
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Re: 3.5" DX screen hacking information

Post by QuickSkope » Thu Feb 04, 2010 12:21 am

If I may say, this screen is like 50% less expensive on Ebay :P

This is the same screen, right?
http://cgi.ebay.ca/3-5-3-5-Inch-TFT-LCD ... 20af0d09f2
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Re: 3.5" DX screen hacking information

Post by Kyo » Thu Feb 04, 2010 3:22 am

hailrazer wrote:Oh yea, I found out that the video ground on these Hong Kong monitors have to be hooked up to the battery ground.

I wonder if that is the problem with the rolling screen on all the 3.5" screens ?
(late reply)

grounds between console and screen ALWAYS have to be connected, regardless of what screen it is.

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Re: 3.5" DX screen hacking information

Post by hailrazer » Thu Feb 04, 2010 5:56 am

Kyo wrote:
hailrazer wrote:Oh yea, I found out that the video ground on these Hong Kong monitors have to be hooked up to the battery ground.

I wonder if that is the problem with the rolling screen on all the 3.5" screens ?
(late reply)

grounds between console and screen ALWAYS have to be connected, regardless of what screen it is.
Yes but power ground and video ground doesn't necessarily mean the same thing :wink:
My Portable Systems:
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-----Genimini---------Darth64---------Dreamtrooper--------Ncube---------Kamikazi64---N64Boy Advance

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