PCEGT replace with 3.5inch TFT LCD

[c0ldb33r]

is the final goal to offer this as a modding service? if so you guys could make a mint!

[BlueBMW]

is the final goal to offer this as a modding service? if so you guys could make a mint!

EDIT
Thats a possible goal.  And its a long ways off yet... as far as making a mint though, if and when it happens, it probably wont be that lucrative.  It never really is with these sort of things.

The goal is to make these video encoder boards that can be used both for this screen swap mod, and to mod other consoles for s video and component, and also to function as an RGB amp.

[phipscube]

Your combining the RGB amp with this!? How completely awesome! Great idea, thanks for your great work guys. I'll be up for 2 of these when the are done then! 

[BlueBMW]

Your combining the RGB amp with this!? How completely awesome! Great idea, thanks for your great work guys. I'll be up for 2 of these when the are done then! 

The chip does some amplification and so to use it as an amp you just need to add a cap and resistor to each line after the chip.  This can be done on the wires leading from the chip.

Alternately, I drew up some standalone RGB amps that I may make separate:

/RGBAmp-1.jpg

[Bernie]

Too bad I never bothered with the handheld systems for the turbo, this looks cool!

[grahf]

If you go with the CXA-1645 encoder, they are known to produce a nice stable RGB signal. That way you can get both S-Video and RGB out, if you're using it on a console. I don't really know if those chips are still available though.

Just for fun, here is a picture of the S-Video boards I made when I was modding systems a few years ago (minus the IC and a few caps). I actually used the CXA2075 (see this page for info: http://www.videoi.com/~pietro/cxa2075/ ), so there were a few less external components on my board. Anyways, anyone who has a system I modded should be able to easily get RGB by adding the three caps and three resistors on the top left.

[thesteve]

the chip we are designing around is pin for pin interchangable for the cxa

[thesteve]

component video proof of concept
wired on a genny2

[thesteve]

https://www.tapatalk.com/groups/pcengine/express-gt-composite-t179.html

Encoder no longer needed:

[Duo_R]

Ok please elaborate how u did that?

[thesteve]

clue's for now....lol
I had to lift 5 pins and ground them. (you might be able to see them in the pic)



PS: thats an NPN transistor and 75ohm resistor under the grey

[c0ldb33r]

thats awesome. I cant wait for this to enter mass production

[turbokon]

No way!! You sure you're not tricking us with console hooked up to the screen nearby?!?! Just kidding:) Anyway, that's freakin awesome!!!

[thesteve]

simple isn't it

[NecroPhile]

Well done, Steve.  

I figure in about five years, Steve will be piecing together new Duos from parts.

[incrediblehark]

i gotta get me one of these gts! steve, you are teh mad scientist of obey

[thesteve]

ok offer it I will.
$45 for the AV mod with cable.

public.blu.livefilestore.com/y1pCmp4_SiWBZg3XePfKZ5DwCZHKvD0hocG4qSMPidK3upvsjIUKGLXJS-AzDOSYAmMW5pibhkiXxoHLqG9mNI28g/2323%20(1).jpg

can be done as a $5 add on to the screen swap

[c0ldb33r]

Sign me up - how much for the screen swap - send me a pm with paypal info 

[MotherGunner]

Oustanding Steve.  Now you need to tackle the last frontier in GT/TE.  New housing and six buttons!

[incrediblehark]

if i can get my hands on a cheap gt, I'll have to send it to you for the screen swap/av mod

[turbokon]

simple isn't it

So will this disable the current TE LCD ? I would be interested in doing a audio/video output mod but not cut up my unit for LCD swap.

[thesteve]

the original screen still works

[thesteve]

[HercTNT]

  I just giggled

[MotherGunner]

Steve, is there a way to put the AV mod on a TV Tuner instead for those of use who don't want to cut into the TE to add the 3 RCA plugs?

[HercTNT]

Sigh, I cant use a tv tuner, i broke the cable in mine. I have sent my gt off to steve though for this mod, and i encourage others to do the same.

[Sadler]

Steve, is there a way to put the AV mod on a TV Tuner instead for those of use who don't want to cut into the TE to add the 3 RCA plugs?

I think the only hole you need in your TE is a ~3.5 mm one for an AV cable.

[MotherGunner]

Even better since the tuner has a 3.5 in

[thesteve]

the AV out cant go on the tuner, but it can use a 3.5 jack, which is what i did

[turbokon]

Can you use the one used for the earphone jack? You'll have to find the right phone jack that also have a video signal? Save you from cutting it up. Thesteve, have you sourced a part number for it?

[MotherGunner]

the AV out cant go on the tuner, but it can use a 3.5 jack, which is what i did

Or even the link port?  (I don't plan on playing Falcon 2.0 with a friend any time soon)  =)

[thesteve]

as for the jack I havent been able to source one with the 4th contact, so i had to modify one.
i plan to start modifying the headphone jack for future mods

[MotherGunner]

Hmm, perhaps there is a way to have the ability to "switch" from headphone mode to AV out mode without having to drill a physical switch?  (Similar to how you hold select to go from USA to Japan mode when region board is installed)

[thesteve]

the AV out is headphone compatable (no switch needed)

[MotherGunner]

Ah, very cool.

[HercTNT]

Hence the term "AV" otherwise it would just be "V"  

[MotherGunner]

I knew that...I didn't know he could route the AV out as well as the headphone functionality through the same port.  =)

[HercTNT]

  yea i know, i just could not resist sorry he he.

[thesteve]

[MotherGunner]

That's pretty frakking awesome.  I wonder how hard it would be to mod a PCE controller port into the old tuner port (for a six button/2nd controller fun)

[HercTNT]

STFU!!!!   Steve's already got enough of my money, I dont need him to come up with another feature I can't live without!!      I'm already anticipating him figuring out how to add battery backup to the thing one day then i'm gonna have to send it to him again. Do my wallet a favor and stay out 

[MotherGunner]

Mua ha ha ha ha!!!!  Rofl!

[Sadler]

*pics*

Holy shit that is awesome!

As for the controller port thing, I about blew my load in chat one day when that idea came up. I understand that it's a pretty big unknown right now and the mod might not allow the standard Express controls to work. Getting a controller port on the Express would be absolutely incredible though.

[thesteve]

its doable

[Sadler]

How much? I'm absolutely game for it, I was going to offer a bounty for getting that ability at some point. Ideally I wouldn't have to sacrifice the tuner input though.

[HercTNT]

i hate you mothergunner.........................ok steve..............how doable?  you know......just incase..........someone............might be interested. i'm mean, not me.......lets say i know this guy..............

[thesteve]

for a standard port1 its direct wire
the trick is to make it port2

[Sadler]

Forgive my ignorance, but does standard port 1 preclude plugging in a turbo tap? Either way I'd be down for it.

[HercTNT]

could you tap the controls off the cpu, or is it more complicated than that?  I wondered about the tap as well. if you routed port 1 to the side, could you not just use a tap and get two player?

[thesteve]

port1 tap works