USB OTG vs bridging cable

March 25, 2017 at 10:47:42
Specs: several
Is a USB OTG (On-the-Go) cable the same thing as a USB
bridging cable, or are they different?

-- Jeff, in Minneapolis

message edited by Jeff Root

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March 25, 2017 at 11:53:06

From the above it would appear they are very different...

Never having used either I merely dun a trawl - partly for my own edification...; and partly to assist...

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April 1, 2017 at 12:47:10
So ... Why am I told that using that a plain USB cable to connect
two Windows computers could blow them up, yet I can use a plain
USB cable to connect my Windows 10 notebook to my Android
tablet and transfer files between them with Windows Explorer?

-- Jeff, in Minneapolis

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April 1, 2017 at 15:11:53
See if this helps follow it all?

- note the mini usb end is slightly different - it has an extra wire...

Also as I see it, the Android (and other smart phones using a min usb port) does not have volts out on any of its pins... Whereas Windows/Mac systems do...

And on Windows/Mac standard usb cables those volts are on the same pin(s) at each end in the same polarity - unless you use a bridging cable, which isolates both sets of voltage pins from each other...

So if the Android etc. doesn't have volts on pins 1 and 4/5 then a standard usb cable is fine between it and a Windows/Mac system. But if going between two Windows/Mac systems there "will" be volts present on those common pins...; and thus conflicts and probable very likely...

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