[email protected] said: >> I donât think the issue is that the board designers cut cost - >>thereâs power regulation on the boards. > I'm sure there is. But not a lot of it. Many are the reports of problems > in the presence of wobbly power - I'd heard a few myself even before I > started working with these boards.
The regulators on the Pi provide 3.3V. The Pi expects the 5V to be close to 5V. I think the basic problem is that the USB specs allow a lot lower than 5V and the Pi designers didn't leave room for that. USB spec says: All hubs and peripheral devices shall be able to provide configuration information with as little as 4.00 V at the device end of their B-series receptacle. Both low and high-power devices need to be operational with this minimum voltage. Figure 11-5 shows the minimum allowable voltages. Note that under transient conditions, the supply at the device can drop to 3.67 V for a brief moment. The 24 AWG is a step in the right direction but not good enough if you expect 5V. -- These are my opinions. I hate spam.
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