inside (possibly) the only PSP go cable connection with all 28 pins
The part number on the Power adapter with all the pins is a PSP GO TRAVEL CHARGER MODEL: PSG-AC
I am documenting this project here
https://gbatemp.net/threads/i-am-going-to-build-a-psp-go-dock-in-2024.666601
Here is the first initial notes that I took:
I am in Canada and it's probably about the same everywhere the PSPgo docks are worth $300. Then you need to get a power adapter and a PSPgo video cable.
So all in (if you can find the parts) your looking at $500-$600
I have found some great online resources to help with the Pin outs of the PSPGo. And what resisters and switches I will need to use to get every possible feature from the PSPGo.
Pin outs of connector:
https://acidmods.com/forum/index.php?topic=34981.0
https://www.psdevwiki.com/psp/Psp_Go_Jigkick
https://consolemods.org/wiki/PSP:Connector_Pinouts
Building a 4-in1 video out and charge cable: (This post was what got me wanting to make this again)
https://www.reddit.com/r/PSP/comments/ptme78/4in1_cable_for_the_psp_go_created/
The first step was to get a 3D printed dock that will allow for a connector to be mounted in it.
https://makerworld.com/en/models/81750#profileId-205733
The second step is to get a source for the PSPGo 28pin connector. This will be the hardest part.
The third part is to get all the other cables, connectors and components to handle the outputs. All of this stuff is available over the counter.