The RePSX works with all revisions (either 5 pin or 7 pin) from all regions (PAL, NTSC-J, NTSC-US). It's a good solution to avoid step-down converters or just to replace an old PSU.
Please note that this follows PCB layout best practice for power supply design and that all components are good quality branded ones.
Output ripple+noise under load was under 50mV when tested with a good quality 12v AC/DC adapter. Please note that getting a good quality 12v AC/DC adapter is important if you want to get a clean and stable signal. In addition, I always advise using a good-quality (screened) AV cable for best results.
This is compatible with X-Station, MODE, and HDMI solutions available elsewhere for the PSX.
If you wish to buy the 12v AC/DC adapter from me, check my other listings (I'll happily combine shipping for international buyers: send me a reminder after the sale and I'll refund the extrapostage you've paid for).
Any questions, feel free to contact me.