5 May
2012
5 May
'12
10:26 a.m.
Mouse wrote:
The connector is not all there is to it. I recently
ran into a device
(not a phone, but it wouldn't surprise me if phones did the same
thing) that, if you plug in the wrong charger, even though the
connector is correct, displays a snarky message about how you have to
use the charger and cable that came with the device, and refuses to
charge.
There are far worse abuses of USB connectors than that. I've got a
pulse oximeter with a mini USB B connector, but it isn't a USB device.
It has 3.3V CMOS async serial (not RS-232) on the connector, and may be
damaged if it is plugged directly into USB. The cable they provided,
USB A male to USB mini B male, has a USB to serial chip molded in.
This would have been a reasonable plan, if they had found some other
connector to put on the device, rather than a USB connector.