On 06 Jan 2021 at 16:05:39 GMT, Martin Gregorie 
wrote:

> 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.

Thanks - that's useful to know.

> That you don't know that shows that you usually stop your Pis by powering
> them off.

No "usually" about it. This is my first Pi and it was unboxed approx 24 hrs
ago.

> 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.

Roger that, Houston.

--
Tim

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