Electronics > Projects, Designs, and Technical Stuff
USB using nonstandard connectors
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NiHaoMike:
The main problem with using the 3.5mm connector for anything that has power is that it momentarily shorts when connected/disconnected. But it has been done - the iPod Shuffle (except the original that has a standard USB plug built in) does just that.
rakeshm55:

--- Quote from: Richard Crowley on November 10, 2018, 12:38:37 pm ---
Extremely confusing.
Is this "chassis circular data connector" INTERNAL to your gadget, or the EXTERNAL user-accessible connector?
What is the connection from the board to the internal cable?
What is the connection from the internal cable to the front panel?
What is the connection external on the front panel to the user?
How long is your internal cable path?
Why isn't grounding/shielding already part of the external user connector?


--- End quote ---
Chasis circular connector is user accessible external connector
Internal board to front panel via a flat ribbon cable...cable not shielded ..length will be 6inch max...both side will have a 0.1inch header...circular connector soldered to front panel....
External connector will be fischer https://www.fischerconnectors.com/global/en/products/ultimate







james_s:

--- Quote from: 001 on November 10, 2018, 03:38:53 pm ---Huh

Why USB connectors so ugly and  useless?

Why nobody use simple 3.5 4-wire male jack for USB?

--- End quote ---

Because using the same connector for multiple different standards is stupid. You don't want 5V with the ability to deliver 1A or more on the same connector you plug headphones and other AV stuff into.
001:
No
headphones use TRS jack
bob225:

--- Quote from: 001 on November 11, 2018, 08:55:50 am ---No
headphones use TRS jack

--- End quote ---

you never used a headset or a mic/earphones that are supplied with a lot of phones all use TRRS even if you do put in a TRS jack into a TRRS socket your have a resistive short avg of 25 ohms but can be 8 to several hundred ohms (apple earbuds are 23 omh's iirc)
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