5v power supply is not so easy to find since except the phone not much of it runs on 5V that is not USB.
So main idea here is to make 5v power for CPC to be able to connect any adapter that have USB-C output and power on the Amstrad/Schneider CPC.

Dangers of USB-C and CPC 5v

Few things are in question here. On forum it is said that USB power can damage CPC, that it will not work correctly due to power variations and that CPC does not have power protection electronic.

So I decide to ignore all that stuff and make my own USB-C connector so I cut the case and solder the connector to existing 5V port as tou can see in the image below. It is easier and most elegant solution. Better solution which I came up after this is to use 12V port nearby instead of 5V input. This will be better as it would be easier to remove connector from board (you have to desolder connector every time you want to disassemble board this way). But you have to cut traces from 12V connector to rest of the board. That can be tricky to do since other line is under element near connector, but it’s doable. It will also permanently disable board to have 12V power, which is not a big problem as you can use buck convertor to create 12V from 5V.

There was a lot of debate how much power CPC uses, people says that 2A is not enough and that 3A or more is needed. I don’t think so, I measured power usage on both cable and inwall device, they have same results

So as you can see even with ulifac it uses 6W (a bit more than 1A).I never saw it above 7W, which is nowhere near 10W (2A). So claims it needs 3A is completely false. Even with wireless module for ulifac!

Do not use charger for USB-C

I must say that chargers didn’t work very well here! Maybe it’s because the support quick charge which give some ripple as it’s trying to detect voltage change passed by phone to increase it to 12V which would kill CPC. While this works, I suggest 5V only (not Quick Charge) power just to be on safe side and clear picture.