USB but the connector is TRRS

@lachs0r no one can agree on which parts are the data pins and which ones are the power pins either
@lachs0r joking aside the more i think about it, the more reasonable it becomes

it's very low profile, rated for thousands of use cycles, somewhat sturdy and can be very secure or even locking.

although I'm not sure how safe it would be. you *know* people would be tempted to plug a TRRS USB into a sound card or something silly like that
@lachs0r OH RIGHT, the iPod shuffle 2nd gen!

totally forgot all about it

@null waiting for a smartphone that does this. they already probe the TRRS impedance to figure out what you’re plugging into it and whether it’s safe to output audio, so switching it to USB on demand would not be unthinkable

@null i mean if they’re going to be assholes about connectivity for no damn reason, might as well do it in style

@lachs0r the only bad thing i think in regards to mobile devices is losing the ability to charge and use headphones at the same time. that was a problem with the 2nd gen iPod shuffle

it does remove a connector tho, unifying the two

@null it just doesn’t make any sense to remove connectors. 2.5mm trrs is literally smaller than usb-c. hell, might even have more than one!

@lachs0r could absolutely have more than one, even 3.5mm! even 3.5mm has a way lower profile than usb-c and you don't have to worry about orientation with a round connector

in most applications where you only need 2.0 connectivity this honestly seems like one of the best options. even thinking about board placement: a SMT TRRS jack is way easier to solder and manipulate than a mini or micro usb connector , and that's if you even need it SMT over through-hole. not only that, some devices don't even have the jack attached to the board at all (like my LG G3, it just had edge connectors that contact when the board is placed in the midframe)

I'm going to have to consider this in future projects i think

@null i’m just slightly worried about the electrical implications of a connector that’s only halfway inserted, and whether off-the-shelf components can generally deal with that or need additional protection

@lachs0r that's a pretty valid concern, but you're only really going to experience the problem in really stiff connectors

thinking about the problem though, if the TRRS was set up 5v, d+, d-, gnd you'd then have a bridge on 5v and d+ inside the jack and potentially send 5v down d+ inside the wire with d- potentially hooked to ground. while d- hooked to ground wouldn't be a concern really, having d+ and 5v bridged could potentially be nasty for both ends unless there was protections on the TRRS side

i wonder if you could use a switching type jack for protection somehow? makes me wonder what apple did with the iPod shuffle for its headphone jack...

@null i’m worried about it because you’ll experience the problem every time you insert or remove the connector

re apple: maybe they just assumed USB for TRRS and audio for TRS (two contacts shorted out)?

@rabcyr that literally exists and universal AC adapters generally include a connector for that

@rabcyr would rather abuse bnc or other locking connectors for that

(also i really like neutrik’s powercon connectors)

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