[time-nuts] Small time server for mobile use.

[Frister]

I've noticed that on my RPI as well,
Time stability improved greatly when connected to a simple and well
cooled 7805 voltage
regulator. My RPI (GPS PPS) runs at about +/- 2 uS on a somewhat
medium CPU sytem
load. Good enough for my needs.

Frits

On 5/24/15, Attila Kinali <attila at kinali.ch> wrote:
> On Wed, 13 May 2015 09:07:44 -0500
> bownes <bownes at gmail.com> wrote:
>
>
>> For the advocates of RPi solutions, I put about half a dozen in to support
>>
>> some non mission critical infrastructure about a year ago. We are using
>> them
>> for for logging, reading QR codes, running a vending machine, kiosk web
>> browsers, and similar tasks. In short, nothing requiring heavily lifting.
>>
>>
>> I've been incredibly dissappointed in the results. Well over half of them
>>
>> have needed replacement and not a one runs reliably. They need rebooting
>> at
>> intervals from hours to a few tens of days to recover from total lock up.
>>
>> The problem is not environmental, power or SD cards.
>
> Do you know what the problem is?
>
> I know that the RPI has pretty cheap design (like most of these super-cheap
> SoC boards) and does suffer from a few problems. The most common one
> is under-designed power supply. Together with the ultra-cheap wall-wart
> supplies mostly used results in a quite decreased MTBF due to spikes/drops
> on the power rails (BTW: soekris suffers from that too, just that a better
> wall-wart supply doesn't help). Depending on the environment, in which
> those boards are run, overheating might also be a problem.
>
> Other than that, i am not aware of any software or hardware issues that
> would cause the RPI, or any other board, to run unreliably.
>
> 				Attila Kinali
> --
> < _av500_> phd is easy
> < _av500_> getting dsl is hard
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