RGB Amp design schematic! Hope it helps serve many amps to come!

[override]

Sup mah peeps!

Ok, thanks to forum member incrediblehark I was able to finally give this amp a test run! He sent me this type transcoder along with his duo so I could test this amp and if it worked, perform the mod on his duo. Well I finally got the scart cable in the mail today so I went to testing with numerous games. This amp provides awesome color, and amazingly greater detail. It takes out the blurriness that is created by the composite when displayed on an HDTV. Im using duojindances duo to PS1 adapter to connect from the duo to the scart cable.

Here is a picture of the amp itself top and bottom for reference:





RGB Schematic, also you can download the PDF below:



Sorry for the glare, I need to redo this at night time...These are on a Samsung 55" UN55D7900 TV in 4:3 Aspect Ratio. If I get the CRT tv I've been wanting I will take more pics on that too.

Composite is first, Component is second:










The colors are much richer and the picture is not smeared looking, the brightness needs to be adjusted for Component, It needs to be lowered so you can see more of the fine details.

Alrighty I ended up getting myself a Sony Trinitron KV-32FS120, here are some comparison shots of Composite and Component in that order.

[Charlie]

Nice artwork!

No schematic?  If not, some questions:
1.The 100/16 cap at the left end has both pins marked "GND"?  I think the top one ("GND board" ) should say "PWR board" or maybe "VCC board". Or am I reading your circuit wrong? 

2. "GR"  = (either Green or Gray),  "BL"  = (either Blue or Black).  Also, Purple is not a valid color, it's actually Violet.  So my guess is Violet, Green, Black for 75 ohms?

3. I see "104k 125~G" at the left end, is that a .1uf , 125VAC cap?

4. IC numbers?

5. You don't distinguish the inputs from the outputs.  I'm assuming that those solder points marked "8 Din" are the outputs to a connector?

And, how well does it work?  Get those IC's down and show us!

Thanks,
Charlie

[esteban]

"IC2" is mislabeled. It should read as "ICU2".

Your welcome.

Schematix4eva

[Platinumfungi]

Awesome 

[Charlie]

>>"IC2" is mislabeled. It should read as "ICU2".<<

Not necessarily, he can call them anything he wants; whether "IC1", "IC2" or "ICU1", "ICU2", is up to him.  (Of course, traditionally they should have the same prefix)

My question was intended to point out that, without a schematic,  we don't know what the IC's are. 


>>Your welcome<<
Thanks, and you're welcome also.

Charlie

[override]

Nice artwork!

No schematic?  If not, some questions:
1.The 100/16 cap at the left end has both pins marked "GND"?  I think the top one ("GND board" ) should say "PWR board" or maybe "VCC board". Or am I reading your circuit wrong? 

A: Im sorry I must have mislabeled it! It is not exactly final but is close enough to finished that I figured I would throw it up! I'll fix it up and repost a new pic! Thanks for the good eye!

2. "GR"  = (either Green or Gray),  "BL"  = (either Blue or Black).  Also, Purple is not a valid color, it's actually Violet.  So my guess is Violet, Green, Black for 75 ohms?

A: Purple (Violet), Green, Black, Gold

3. I see "104k 125~G" at the left end, is that a .1uf , 125VAC cap?

A: .01uF 630VDC

4. IC numbers?

A: Those will be posted......soon

5. You don't distinguish the inputs from the outputs.  I'm assuming that those solder points marked "8 Din" are the outputs to a connector?

And, how well does it work?  Get those IC's down and show us!

Thanks,
Charlie

A: For most that have read up on an RGB mod (assuming if you want to do one you have) then you would generally know you will be replacing the 5 pin din with an 8 pin din. I will be putting up install instructions with pics when I can get around to it! Thanks for the questions and interest!

[Charlie]

104 is 0.1uf, 103 is .01uf.  However, either will work in this circuit.

>>replacing the 5 pin din with an 8 pin din<<.  I only have a TG16, which I do not believe has a DIN connector at all.

But, I'll wait for your update.

Keep up the good work.

Charlie

[override]

104 is 0.1uf, 103 is .01uf.  However, either will work in this circuit.

>>replacing the 5 pin din with an 8 pin din<<.  I only have a TG16, which I do not believe has a DIN connector at all.

But, I'll wait for your update.

Keep up the good work.

Charlie

There is another way to tap RGB in a TG console. You have to tap it through the pins on the expansion port I believe....

There is a site by mmmonkey that I believe has a walk through on making a TG RGB capable!

For anymatter It results in case cutting to add an output if my mind serves me right.

[Charlie]

>>tap it through the pins on the expansion port <<
That is correct.
The rear of the TG16 has a "shell" (empty cover) that could be used to house the amplifier board; you could either tap into the port, or get a connector.  The outputs can come out one of the openings in the shell that already exist for other purposes; the output need not be a  mounted connection, it can be a cable-end connector.

That is a bit of work, but probably cheaper than the usual RBG booster.

Good luck,
Charlie

[ooPo]

A turbo booster makes a nice place for an rgb mod, if you don't want to open up or cut holes in the TG16.

[blueraven]

Over, this is Bad@$$. 

And we don't have a guide on building an RGB amp in the mod section of the forum.... 

Please modify this post or turn this into a mod/repair guide explaining how to build the RGB amp for teh n00Bs. That way we can send Aaron an email and turn the post into a sticky. Just an idea.

Thanks for all your hard work! Now I have an idea how to build one myself.

[override]

Over, this is Bad@$$. 

And we don't have a guide on building an RGB amp in the mod section of the forum.... 

Please modify this post or turn this into a mod/repair guide explaining how to build the RGB amp for teh n00Bs. That way we can send Aaron an email and turn the post into a sticky. Just an idea.

Thanks for all your hard work! Now I have an idea how to build one myself.

I do plan on turning this into a guide eventually! Ill modify the first post when its all complete into the guide and have pcengine sticky it! Thanks for the compliments!

[papa_november]

I'm guessing those chips are dual op-amps of some kind?

[Charlie]

"I'm guessing those chips are dual op-amps of some kind?"

Possibly NJM2267 (or equivalent)?  The 47/100 caps on the outputs are kind of a hint, and the unusual VCC/GND connections are pretty much a give-away.

Hope his prototype works, hope he allows duplication/copy.


Charlie

[Ravij]

A: For most that have read up on an RGB mod (assuming if you want to do one you have) then you would generally know you will be replacing the 5 pin din with an 8 pin din.

Hi - does any one in the UK know where I can find one of these now. My regular supplier hasn't been able to get an 8-Pin DIN for ages (I've been trying to pick one up for a few years now) Everywhere else seems not to have them any more.

thanks.

[override]

A: For most that have read up on an RGB mod (assuming if you want to do one you have) then you would generally know you will be replacing the 5 pin din with an 8 pin din.

Hi - does any one in the UK know where I can find one of these now. My regular supplier hasn't been able to get an 8-Pin DIN for ages (I've been trying to pick one up for a few years now) Everywhere else seems not to have them any more.

thanks.

pcenginesales on here has them, you can go to her website an order them, I believe she has it posted on her profile on the forums.

Sorry guys I have not gotten around to getting the rest of the information up on here, I still need to order the IC's and see which works the best. I have exiles system in the works, just recieved soviets motherboard for his duo with the CD issue and believe I have it fixed (just gotta get the work done) and im busy with blugeons systems aswell. Just got back from a family reunion and Im still unemployed...hehe gotta start looking for a job.

[override]

Sup Guys!

I'm not sure what happen with my photobucket pic of the design schematic but I will get that back up soon! For the time being I just wanted to throw a bump up on this thread and say that I have finally ordered what I believe will be a good IC to use for this project. As soon as I get them in and test them,  , Im hoping I can finalize this thread for the Amp Design.

Thanks for being patient!

[override]

Finished testing out the amp design thanks to incrediblehark! See First post for pictures....

[esteban]

Finished testing out the amp design thanks to incrediblehark! See First post for pictures....

Significant improvement; nice pictures.

[Charlie]

Schematic?  IC's = 2276, or what? Where to purchase them? Boards available, or we make our own? etc,etc

Charlie

[Cyborc]

lookin good man!

[SignOfZeta]

I don't seen any "RGB Amp design schematic" in this thread, just screen shots. Am I missing something, or has it been edited away after the fact?

[override]

Technically there wont be a schematic but more of a picture of the components and how they connect....As stated in the first post I will get the rest of it up soon.

Thanks for the interests!

[override]

Nope not anything I bought that something was unmarked, I just have not had the time to really mess with anything system wise with the exception of what I have on hand that needs to be finished and mailed out.

It was my intentions to not make a schematic for the simple fact that most people cannot follow a schematic so well, including myself and want somethign they can look at and go "Oh so thats how it works". I had planned on making the picture of how to build the amp with the pad2pad program. I actually had the amp made up in the program but somehow lost, misplaced or deleted the files.

Thanks for the schematic post, mine is similar but far more smaller than yours! I give an A+! Looks like you got around to it while I was sitting here forgetting about it....lol

The only things I can see different are some of the caps are higher than the ones I used and I think there are a few extra's not necessarily needed. I would assume it shouldn't make that big of a difference tho!

[override]

Like I said pretty much the same with a few differences...Hope to see more of your work on the forums! Welcome aboard!

This is what mine looks like, this is my most recent one.....You should post up a comparison picture for us, I'd like to see what kind of quality the differences of your board and mine reflect!

[incrediblehark]

good to see the transcoder worked out for you! and the picture quality looks great, keep up the good work!

[Duo_R]

sorry to bump an old post override, but I never saw a schematic in your thread. Is this the amp that you built:

http://www.gamesx.com/wiki/doku.php?id=av:n64rgb-amp#rgb_amplifier_installed_in_n64

[blueraven]

Dude. Bump away. I had no idea this post existed, so you're doing me a favor!

Where the hell is over anyway? I have a turbo game for him...

[override]

Sup Mah Peeps,

Life still isn't quite where I want it to be so I'm not back yet but found this post through a google search and figured I'd check it out....

The chips are NJM2267D

I haven't really gotten any furthur with anything system related since about a year ago or so...I pulled out incredibleharks system to finally finish it. He has waited patiently for quite a long time, and the system is long overdue for being repaired and sent back.

How have things been around here?

Oh and whats this I see about you having a game for me blueraven...?

I know I have said this time and time again but if I ever get settled somewhere, somehow then I will be putting some more effort into the Region Mod chips that me and Zeon had plans on making and I plan to make an RGB chip aswell that you can just pop the caps and IC's into and solder them down and bam its done. It would be awesome if I could make solderless chips...Dont see that happening tho.

[esteban]

Hey override.

[BlueBMW]

...I pulled out incredibleharks system to finally finish it. He has waited patiently for quite a long time, and the system is long overdue for being repaired and sent back.

Very glad to hear that man!  He contacted me about repairing a second broken Duo that he got.  He'll be thrilled to hear from you!

[override]

I just wanted to give an update on the thread, I know its years old but hey I felt I should finish up where I left off. The schematic is edited into the first post as a PDF download. Thanks guys!

[NightWolve]

Is this the best RGB amp, would you say ? Is the DC offset filtered out by these chips ?

I'd like to know 2 things:

1) The best transistor-based circuit that you can build yourself with spare parts (caps, resistors, 2n3904 transistors, etc.).

2) The best op-amp type circuit, fully tweaked with confidence, yadda yadda, etc. should I ever choose to buy one of these custom chips and experiment.

[override]

Is this the best RGB amp, would you say ? Is the DC offset filtered out by these chips ?

I'd like to know 2 things:

1) The best transistor-based circuit that you can build yourself with spare parts (caps, resistors, 2n3904 transistors, etc.).

2) The best op-amp type circuit, fully tweaked with confidence, yadda yadda, etc. should I ever choose to buy one of these custom chips and experiment.

I don't think this is necessarily the best RGB amp but I know it works really well, I have built and used the RGB amp using the ths7314dr chip and while that is a much smaller and simpler amp I don't find it to be nearly as effective. As for the DC offset (assuming your talking about alignment of the picture to the center of screen) I would say it is fairly perfect. I have used this amp in several NEC systems and it has yet to yield varying results, always a much brighter picture with more clarity and seems to be centered very well on the screen of choice.

1) I have never built a transistor based circuit out of spare parts. I do not claim to be, and I know I am not, as good as you and charlie and any of the other circuit guru's out there. I am simple man, that reads and researches a lot and figures things out on (mostly) a common sense based outlook. The audio circuits that I have discovered chips for to replace was all through tracing circuits back to the source with a multimeter and then trial and error.

2) I don't believe I would ever be building these to sell, that is why I made the "user friendly" schematic and put it out to the public. It is not my original work although I had considered at one time to design a board based around this circuit that would allow someone to just plug in the chips, solder the components and go. I would be more than happy to build and send you one of these amps for you to test out though.

[Ravij]

I can vouch for the NJM2267 based amps giving good results.

https://www.pcengine-fx.com/forums/index.php?topic=10801.msg358650#msg358650

The IC are available in DIP or surface mount packages, and can be easily got on EBay for a few dollars.

I will hopefully be getting another RGB amp next month based on a different IC (4 channel LT6551) so I will probably try that out and see how it compares.