Hey All,
I’ve got a thunderbolt that apparently decided to go deaf since the last time I
checked in on it. I’ve double checked voltages feeding into the unit, as well
as making sure 5v is going to the antenna, as well as on the pre-amp chip
inside the unit.
Everything else about the unit seems
I forget where I saw it, but my understanding is that the big issue is finding
SD cards that can perform whole-disk wear leveling, like proper SSDs do.
Apparently, the WD purple series do, according to the e-mail thread I read that
I forgot where. Someone contacted WD and got a confirmation that
The sandisk extreme sd cards have an excellent wear leveling algorithm.
KR
> On Dec 8, 2021, at 1:26 PM, Nick Sayer via time-nuts
> wrote:
>
> I forget where I saw it, but my understanding is that the big issue is
> finding SD cards that can perform whole-disk wear leveling, like proper SSDs
On 12/6/21 11:34 AM, John Miller via time-nuts wrote:
This is something I have explored from time to time in order to find
a good local display option for Pis running as GIS-disciplined NTP
servers. I've done a lot of exploring and fiddling around with different
options but have yet to find a sol
On Wed, Dec 8, 2021 at 9:41 PM Lux, Jim wrote:
>
> When last I was looking at this, it turns out there's a bunch of
> non-traditional display shapes available for things like "Shelf edge
> displays" and such. That is the google-able phrase to turn up stuff.
>
> https://www.sunul.com/pdf/lcdr/sr2
SD cards used in dashcams also suffer severe rewriting behaviour. I believe
there are reviews and comparisons covering various makes in this
application.
On Wed, Dec 8, 2021 at 9:30 PM Kevin Rowett wrote:
> The sandisk extreme sd cards have an excellent wear leveling algorithm.
>
> KR
>
>
> > On
You can also set them up so they don’t write to the SD once everything is set.
SD’s will last forever like this. Basically read only and RAM disk.
Bill Dailey
Negativity always wins the short game. But positivity wins the long game. -
Gary Vaynerchuk
Don’t be easy to understand,
Be impossi
On 12/8/21 2:15 PM, Bill Dailey wrote:
You can also set them up so they don’t write to the SD once everything is set.
SD’s will last forever like this. Basically read only and RAM disk.
yes indeed - these days, with lots o'RAM on a rPi, you should boot off
the SD (or eMMC) and run out of R
Jim,
The wear leveling algorithms have gotten very good at garbage collection, wear
leveling, and bit error recovery codes. (LDPC has gotten a lot of practical
research for flash).
(the challenges are - when to do the garage collection, so as not to impact
read and write rates, yet not run so
Hello,
while taking a measurement my HP53131a counter sparked and became quiet.
After tear down I found both 3A/240V fuses in the PSU burnt. Before pluging a
new set of fuses, is there a knowledge of a common problem that couses a
shortcircuit at the HV side?
The counter has also a spilage
HP used rubber feet as standoffs and they literally melt over time making
quite a mess. But reasonable to clean up. Can't comment on the sparks.
Regards
Paul
WB8TSL
On Wed, Dec 8, 2021 at 5:54 PM Marek Doršic wrote:
> Hello,
>
> while taking a measurement my HP53131a counter sparked and beca
If I were a betting man, I would say that the spillage is from a
decomposed bumper that was placed to prevent the board from flexing and
possibly shorting out.
This is somewhat a common failure for bumpers and rubber feet.
Glenn
On 12/8/2021 5:53 PM, Marek Doršic wrote:
Hello,
while ta
Hi
The PSU in the 131 is a known weak point. Usually when they die, they
take a lot of parts out in the process. The good news is that the PSU in
the 53181 is the same as the 131 PSU. Since 181’s tend to sell for “not
much” they are a fine parts donor ….
Bob
> On Dec 8, 2021, at 5:53 PM, Marek
Thanks to everyone who responded to my first thread about getting a
good clock display on a Linux system. I want to try out some of those ideas
that give a higher-end accuracy, but in the meantime I've hacked together
some basic stuff in Python that is accurate within a few ms.
The main problem wi
Hi Adam:
Years ago I built a hardware clock display settable to 1 ms based on a PIC 16F88 microcontroller. The idea was to
attach these to frequency standards thus making them into precision clocks.
https://www.prc68.com/I/PRC68COM.shtml#07092006
There are some tricks to writing PIC assembly c
> In fact, as long as you can set the clock once, you don't need NTP at
> all. The display will be locked to GPS.
I can't figure out what you mean.
If you don't run something like NTP, your system clock will drift.
If you have something like a PPS from a GPS, then you could run a clock
off the
Thanks Jim,
The Abercon AP3S was what I had used in the past but I had to dig deep
to find a reference to that family there on the web page.
73/jeff/ac0c
alpha-charlie-zero-charlie
www.ac0c.com
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