> I can think of three reasons. > 1) the USB cable end is externally symmetric, usually without any > orientation markings. > 2) the USB chassis end (A connector) is externally symmetric
I'm not really sure how to interpret that because the A connectors (plug in to your comp or whatever USB Host) always have the USB symbol facing up. As for the other end the full size connectors have rounded edges and the commonly used mini connectors are even more oddly shaped. Are you talking about not the cable but the ports themselves? I'm not saying it doesn't happen to me (impatiently trying to plug something in while multitasking), but if you use any device enough to run into the problem, it's likely if you look at the cable it's not a problem. > It would have been better to use hermaphroditic connectors, like the > GR 874 RF connectors. > I'm not sure what those are, but I'm guessing they didn't care power on the same bus. Unlike many household appliances most embedded devices are not built with extra circuitry to handle reversed polarity. -Tom -- [email protected] http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list
