Andy Green wrote: > What I like though is the "Be conservative in what you do" part of it. > Because we have not seen failures in the field from GTA02 arrangements, > I am having a hard time accepting we need to change anything from proven > GTA02 situation. If someone can actually show that GTA02 style > arrangement leads to product failure in normal circumstances then it > makes it clear we need to do better. But it seems thousands of users > are proving it's robust enough already. Why add reverse voltage > protection when nobody seems to have reversed the voltage on their USB > connector to date?
I have two GTA01's that are dead due to 12V being applied to the power supply of an upstream USB hub instead of 5V ... Of course, this was in a test rig scenario, with 5V and 12V both available on a serial-remote-controlled relay box powering the devices, so perhaps that doesn't count as "normal circumstances" (but then perhaps it is normal for a phone like this ...). -- Rod _______________________________________________ hardware mailing list hardware@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/hardware
