this post was submitted on 02 Jan 2024
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I like carrying around one USBC to C cable for my devices, but I don't want to carry around a USBC to A cable for other ports. Is there a dongle that takes a USBC cable and converts one end into USBA? I need it to support at least 15W.

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[–] chaorace@lemmy.sdf.org 15 points 10 months ago* (last edited 10 months ago) (3 children)

First thing's first: all such adapters should be considered evil by default. The only way to make a compliant adapter is with active circuitry in the adapter essentially providing an entirely standalone USB controller interface.

With that being said, here's an adapter which does exactly that. Back when I researched this topic in October I found that the linked adapter is essentially the only one of its kind on the market right now.

[–] maniel@lemmy.ml -1 points 10 months ago (1 children)

Yeah, those are CONSIDERABLY bigger than USB A to USB C dongles

[–] chaorace@lemmy.sdf.org 5 points 10 months ago* (last edited 10 months ago)

Like I said: in order to do it the non-evil way you need to cram in an onboard USB chip. Female USB-C from a Male USB-A plug-in is explicitly not possible to implement in a spec-compliant manner because of the pinouts.

You can brute-force a smaller passive adapter like those online but it's a devil's bargain. Nobody targets these janky adapters when designing products. USB-C things will just break without any rhyme or reason because you're fundamentally breaking the hardware contract and "lying" about the capabilities of your port.