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kalymos / PsNee

PsNee, an open source stealth modchip for the Sony Playstation 1
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Any reason why we shouldn't use 5v Arduino? #12

Closed mylogon341 closed 6 years ago

mylogon341 commented 6 years ago

Hi, I'm fairly new to electronics. I have some 5v 16Mhz Arduino Pro Mini boards and found that these run on 3.3/3.5v no problem. Is there any reason why I shouldn't use 5v boards? Thanks

zoinknoise commented 6 years ago

that’s the kind of Arduino I’m using for PsNee with no problem, the 8mhz option is probably just for people with that board

ramapcsx2 commented 6 years ago

Every 5V Arduino I had / I tested ran fine at 3.3V / 16Mhz. But some of them will not rewrite correctly at that voltage. I'd say it is fine to flash a 5V / 16Mhz Arduino at 5V, and then use in the PSX at 3.3V. Never had any issues and the system isn't critical.

mylogon341 commented 6 years ago

That's great to know. Thank you so much. I was just really confused on why there was such an emphasis on not using the 5v versions without any reason given. Good to know that I don't have to go out and buy more Arduinos. Thanks

ramapcsx2 commented 6 years ago

The warning is a little different: It says you must not use an Arduino that is powered by 5V, the reason being that it would send 5V level signals into the 3.3V PSX.

mylogon341 commented 6 years ago

Ah. So it does. I seemed to have misread/ misunderstood the point. That makes total sense. Thanks @ramapcsx2 !