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8-bit acorn hardware • Re: Recapped PSU or USB-C adapter?

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Looks like I've stumbled upon a nest of people who've never used a good USB PD 3.0 power system, then. 20 V, up to 100 W. Has to be rock-solid as there are workstations that run off it. But you'd hate it, obviously.
Not me. Provided the circuitry has been added to negotiate the protocol and is able to re-create the the three usual voltages (5V 4A, 12V 2A and 100mA -5V) then it is essentially a direct replacement. I use USB-C and the same cabling for Thunderbolt (PCI-E) and am very happy with it. Just don't buy cheapo cables with 32AWG cores, it causes havoc.

I have built a few of the USB-C -> +5V/2A and 100mA -5V boards and they do the job, the chasm left where the PSU used to sit can be used as a battery box, the BBC uses around 10W and a USB-C screen and RGB2HDMI plugged in takes it up to around 25W - so there's potential for a "portable" BBC if anyone fancies it.

Statistics: Posted by maniacminer — Sun Aug 17, 2025 4:52 pm



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