Electronics > Beginners

Recreating mod chip designed for the Playstation 1.

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Mr. Scram:

--- Quote from: KL27x on November 06, 2018, 01:15:50 am ---Well, check where you are going to make your boards... minimum via size is another "luxury add-on," when you go smaller than the minimum. Same number, here, the minimum hole size is going to be around 6-8 thousandths of an inch to not incur special costs.

Yes, Design Rules is what I was referring to.

I'm not familiar with that software, but "holes" are usually not thru-plated, so they are not what you want.

If Amyk and Co had bothered to read any of this thread, they would know that OP is embarking on an educational voyage to produce something for his own singular amusement.   >:D

OP, don't worry, this is just how this forum operates on a regular basis.   :-DD

--- End quote ---
Education isn't supposed to be fun, so correct decoupling it is!  >:D

Katcher:
Is all good. You've all been a wonderful help. I did some experimenting with Holes(HAH!). Seems like they can be used instead of vias. I'll utilise these in the meantime and get 5 boards made. If it works, hooray. If not I'll deal with large unsightly holes. Take that as you will. I get what Amyk is saying about just dead-bugging it but honestly that is messy. It's 2018, imma treat my tech with respect and hopefully not kill it in the process. That said, once I actually have the PCB's and components I think I'll install a new modchip into my SCPH-102 as well with the correct Hex. That thing was modded nearly two decades ago. Before I do order the components though, should I get a 100nF capacitor rated for 16v or 25v? I remember reading somewhere that voltage supplied to the components is between 3.5v and 8v so I don't want one rated at like 100v. That'd be silly.

KL27x:
The 12F508 can handle max Vsupply of 5.5V, so it better not be 8V.

I use 10-50V rated decoupling caps. And my main criteria is w/e is cheapest in the desired package and capacitance, esp where it doesn't much matter. There are additional ratings for tolerances and change with temperature, as well, say for example XR7 is some of the "good stuff," regarding temp stability.

Katcher:
How can I go about testing the voltage that will be supplied to the IC? I can assume whatever it is I'd need to use will need to be in contact to where pads 1 and 8 will be soldered to via wire on the PU-18 board?

Mr.B:
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.

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