Electronics > Beginners

Recreating mod chip designed for the Playstation 1.

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KL27x:
Well, what you're looking for is the nearest 3.3-5V rail you can tap (it depends perhaps on the chip on the mobo you are messing with.. You want to use the same voltage of its Vsupply so the logic levels match), close to where you want to put the chip. Try looking up installation instructions if you have trouble locating a spot, yourself, using say a voltmeter/DMM. But surely you have instructions or else how are you going to install the other connections?  :-//

^Mr.B's gerber, that was what I was suggesting, before. This gives room for a teeny tiny silkscreen, too.  ^-^

Katcher:

--- Quote from: Mr.B on November 06, 2018, 01:50:35 am ---If it needs to be small, why not use double sided.
Put the components on the bottom.
Ignore pin numbers in picture attached. Mock up done in <30 secs.

--- End quote ---

I thought about making a double sided variant after recreating the original modchip but was having difficulty using vias in EasyEDA. Kept giving me errors. You mind if I use this mockup you made for the 5 boards that would be double sided?


--- Quote from: KL27x on November 06, 2018, 01:52:22 am ---Well, what you're looking for is the nearest 3.3-5V rail you can tap (it depends perhaps on the chip on the mobo you are messing with.. You want to use the same voltage of its Vsupply so the logic levels match), close to where you want to put the chip. Try looking up installation instructions if you have trouble locating a spot, yourself, using say a voltmeter/DMM. But surely you have instructions or else how are you going to install the other connections?  :-//

^Mr.B's gerber, that was what I was suggesting, before. This gives room for a teeny tiny silkscreen, too.  ^-^

--- End quote ---

Yeah I got the installation instructions for my board. Looks like I oughta grab a voltmeter before ordering components.

KL27x:
^Oh, one final.. if you use Mr.B's board design, some of the bottom dollar prototyping special 10 fer's don't do tented vias. And god knows why we have to suffer the term tented/nontented, because it is so damn obfuscating. Tented means covered with soldermask. Untented is nekked copper.

So anyhows, if you try to put a silkscreen over a bunch of untented vias, it will remove the silkscreen.

Also, be sure to view your soldermask layer to make sure if your vias are tented/untented as you intend them to be.

Katcher:
Is there away to import Mr.B's design into EasyEDA or am I just gonna have to eyeball it and recreate that one too?

Mr.B:

--- Quote ---You mind if I use this mockup you made for the 5 boards that would be double sided?

--- End quote ---

I simply posted a PNG into the public domain - feel free to use the idea.


--- Quote ---Is there away to import Mr.B's design into EasyEDA or am I just gonna have to eyeball it and recreate that one too?

--- End quote ---

You will have to eyeball it.
I mocked that up in 30 seconds in Eagle and didn't bother to save it. (Would not import into EasyEDA anyway I don't think.)

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