My first selfmade

ROM-Lover · Mar 3, 2009

This my first MAK i do on my own.
I want to build it small as possibile so i decide to put it in an old pc power supply.
It has up/down/coin/menu button.

But the missing thing is a rgb decoder chip.

I found just one ad725 at ebays and he was expensive(especially shipping for the little bastard). Are those chips build in DVD players or some other supplies?

If yes i would grab a broken one and get chip from there.

werejag · Mar 3, 2009

neat idea but wire management needs a looking at

Xian Xi · Mar 3, 2009

Instead of the AD725 you are better off taking the Sony encoder from a PS1.

ttooddddyy · Mar 3, 2009

You can get 2 x free AD 725s (samples for evaluation purposes) at the AD website.

You will need to register

http://www.analog.com/en/content/samples_faq/fca.html

Marshall · Mar 3, 2009

Good idea, well done so far

I'm a bit worried about heat ploblem, though.....

norton9478 · Mar 3, 2009

Do you get any interference running your video wires inside of the PSU?

I would think you would....

xiao_haozi · Mar 3, 2009

Are those bundled, unused psu wires in there? Could probably just terminate those inside and save space and have it cleaner there.
And if you want to have your JAMMA out like that, you could probably put it in a sleeve to protect the wires and again it will look clean.

arfink · Mar 3, 2009

Yes, I agree on covering the cabling. They make these things that I have heard called snake-skins which are a mesh tube for holding cable bundles like that. Other than that, looks nice and a good recycling of the power supply.

xiao_haozi · Mar 3, 2009

arfink said:
Yes, I agree on covering the cabling. They make these things that I have heard called snake-skins which are a mesh tube for holding cable bundles like that. Other than that, looks nice and a good recycling of the power supply.

Yeah a lot of the newer PSUs come with them now... I find that about 50% of the newer ones I grab have stretch tubing (really just mesh nylon) over a lot of the wires especially the bundle to go to the motherboard. Have seen them sold by the foot on spools at the local electronic dealer I visit. Nice thing is you can house a ton of wires and you can remove easily if you need to.

xiao_haozi · Mar 3, 2009

Found a link for some at jameco btw here

Hewitson · Mar 4, 2009

Lol.. Would look a thousand times better if you hadn't have used an old hard drive cable for your wiring :P

ROM-Lover · Mar 4, 2009

Xian Xi said:
Instead of the AD725 you are better off taking the Sony encoder from a PS1.

I´ll have a look for. It´s a chip or a plate? You know the dimension if it´s a plate?
The PS2 has a decoder like this?

ttooddddyy said:
You can get 2 x free AD 725s (samples for evaluation purposes) at the AD website.

You will need to register

http://www.analog.com/en/content/samples_faq/fca.html

Nice idea but they said:

We're sorry but online sample orders will only be accepted from valid email addresses with domain urls that originate from a company (example: joe.smith@ABCcompany.com) or from an educational institution (example: joe.smith@ABCuniversity.edu). ADI will no longer accept sample requests from accounts who have email addresses that have been created using third-party email providers, such as Yahoo, Hotmail, MSN, and AOL.

You know where to get a adress like this?

xiao_haozi said:
Are those bundled, unused psu wires in there? Could probably just terminate those inside and save space and have it cleaner there.

I´ve tried to remove them in the proto of that and it goes boom. :crying:

Marshall said:
Good idea, well done so far
I'm a bit worried about heat ploblem, though.....

So the first try goes to hell i´ve take a smaller PSU and put it in this case.

xiao_haozi said:
Found a link for some at jameco btw here

A good idea i´ll have a look for in germany to reduce shipping.
But it will look much better then.

Hewitson said:
Lol.. Would look a thousand times better if you hadn't have used an old hard drive cable for your wiring :P

Don´t make sense to argue about taste.
Everybody as he like.

norton9478 said:
Do you get any interference running your video wires inside of the PSU?

I would think you would....

i don´t know really cause my TV is an old not full rgb piece of crap that not really could handle it. Sound has a little humming but if you´re gaming you don´t hear it.
Always showing channel info and switches off after a while cause he thinks there is no signal.

A full test and gaming experience at home i can get after putting decoder in.

I´ve checked it on another TV, runs well.

Hewitson · Mar 4, 2009

The Sony encoder is a 20 or so pin SMD IC which does both composite and s-video.

For interests sake, what do you mean by plate?

If you'd like to PM me your address, I have a suitable email address I could order you the samples with.

ROM-Lover · Mar 4, 2009

Hewitson said:
The Sony encoder is a 20 or so pin SMD IC which does both composite and s-video.

For interests sake, what do you mean by plate?

If you'd like to PM me your address, I have a suitable email address I could order you the samples with.

Plate comes from a web translator :spock:

. I mean a board, now remember the word.

I´ve checked ebay and there´re many broken PSX and PS2 to grab for a pocketmoney.

You know if the PS2 has the chip, too?

Cause my brothers case looks awful. Then i could get a chip and he the case.

PM is send. thank´s for your support.

ttooddddyy · Mar 9, 2009

ROM-Lover said:
Nice idea but they said:

We're sorry but online sample orders will only be accepted from valid email addresses with domain urls that originate from a company (example: joe.smith@ABCcompany.com) or from an educational institution (example: joe.smith@ABCuniversity.edu). ADI will no longer accept sample requests from accounts who have email addresses that have been created using third-party email providers, such as Yahoo, Hotmail, MSN, and AOL.

You know where to get a adress like this?

They must have changed thier policy, they used to give them out to any address (apart from PNG which is not on their mailing list :angry:

)
JohnSmith in Australia was kind enough to get mine

BTW they are an excellent encoder for MVS but are lousey with some boards- MK series is a good example.

ROM-Lover · Mar 9, 2009

ttooddddyy said:
They must have changed thier policy, they used to give them out to any address (apart from PNG which is not on their mailing list )
JohnSmith in Australia was kind enough to get mine

BTW they are an excellent encoder for MVS but are lousey with some boards- MK series is a good example.

A member here order it for me.

Good to know that this chip not is the best for all series. thanks.

Hewitson · Mar 11, 2009

ttooddddyy: Any recommendation on better encoder?

Anyone know which is used on JROK?

Xian Xi · Mar 11, 2009

JROK uses a sony for the s-vid and composite.

ttooddddyy · Mar 12, 2009

I was going to say the Sony CX encoder

Hewitson · Mar 12, 2009

I am more interested in the Component version of the JROK.

If anyone knows which chip is used on this thatd be great, as the one on the PCB has had its markings removed.

Shogeki · Mar 12, 2009

I had a few leads on what chip to use to build a component adapter, but i have no clues about what kind of chip is used on the jrok.

Is there some way to id those kind of semiconductors ?

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