This Frankenstein PlayStation PCB reads games from microSD and outputs video over HDMI

We're living in the golden age of retro console modding. If you have an old Game Boy Advance lying around, it's possible to give it a new lease on life with aftermarket parts like an IPS display and USB-C charging. But as amazing as those mods are, most still require an original GBA motherboard with a working processor and RAM. That's what makes the PlayStation Hybrid from YouTuber Secret Hobbyist so cool. Over the past couple of months, they've been working to design, prototype and build the ultimate PlayStation PCB, one that incorporates the best parts of different model revisions while adding a couple of modern conveniences. 

The specific motherboards Secret Hobbyist's PCB pulls parts from are the PM-41 v2 and the PU18, with the former being a PSOne board while the latter was sourced from a "phat" model. The decision to incorporate parts from different PlayStation variants makes a lot of sense if you know something about the history of the console. Between the release of the PlayStation in 1994 and the smaller PSOne in 2000, Sony made multiple revisions to the original design to address hardware issues and eke out cost savings. 

One component that you can find on older models, but not the PSOne, is an Asahi Kasei-made digital-to-analog audio converter (DAC). Over the years, this DAC has gained something of a cult following among audiophiles, with some of the earliest models like the SCPH-1000 and SCPH-3000 being particularly sought after as CD players because they also came with RCA outputs, a feature Sony later cut from subsequent revisions.

By the time the company began producing the PU18, the board still had the Asahi Kasei DAC, and that's one of the components Secret Hobbyist, whose real name is Drew, used for their custom PCB. The PU18 also has a part that makes it compatible with the X Station, a CD replacement that allows a modded PlayStation to read games from a microSD card.   

From the PSOne, Secret Hobbyist sourced the console's GPU and CPU, which are more power efficient than the ones found on its older siblings. Lastly, they incorporated an FPGA chip from a Hispeedido mod kit to make their hybrid PlayStation capable of outputting video over HDMI.

The final result is a custom PCB that is even smaller than the PSOne's PM-41 v2, draws less than two watts of power and works with modern displays. That power draw means the Hybrid PlayStation could be engineered to be a handheld. Secret Hobbyist still has yet to design an enclosure for their new Frankenstein console, but judging from the comments on their video, people are excited to see the final result. In the meantime, be sure to watch the full video to learn more about the project and see some incredible soldering work.