On Wed, 06 Jan 2021 15:17:59 +0000, TimS wrote:

> On 06 Jan 2021 at 14:41:25 GMT, Andy Burns  wrote:
>
>> TimS wrote:
>>
>>>  Andy Burns wrote:
>>>
>>>>  Wouldn't be the biggest surprise in the world if the a cheap switch
>>>>  box just commoned all the 5V pins together
>>>
>>>  Are these 5V signal or power?
>>
>> Power, but only 55mA
>
> Not enough to run a Pi, then, I imagine, but enough to flutter the Pi's
> red/green LEDs.

The red LED just shows that power is on - nothing more.

The yellow and green ones show whether the Pi is active: stop a running
Pi with the 'sudo stop' command and all the LEDs go out apart from the
red one, which stays on until you switch off or unplug the wall rat.

That you don't know that shows that you usually stop your Pis by powering
them off. Not a good idea because it can corrupt the SD card - and Murphy
says that you WILL soon or later power it off while the SD card is in the
middle of wear balancing - this will cause unrecoverable errors.


--
--
Martin    | martin at
Gregorie  | gregorie dot org

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