[time-nuts] counter

Mon Jan 31 03:10:43 UTC 2011

"The discussion seems to want to take place here however. :)"

I would say go with the flow. If the discussion is happening here and "not 
there",
keep it here for now. When the project has gained momentum you can always decide
to go off-list again.

The analog I/O ranges from "too easy" to "tricky", depending on your chosen
counter architecture and maximum frequency.

regards,
Fred

----- Original Message ----
From: Bob Bownes <bownes at gmail.com>
To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
Sent: Mon, January 31, 2011 2:26:22 AM
Subject: Re: [time-nuts] counter

Yes, it's still active. I've created a mailing list and google group
just for the counter project. opencounter at googlegroups.com to keep the
counter project from going out to all 800 time-nuts.

The discussion seems to want to take place here however. :) I've been
trying _not_ to be the lead of the opencounter group, but rather to
enable it. So far it doesn't seem to be working. I guess I'll spin up
another round of benevolent dictator effort and say 'Yo! Over here!'

(I got a 5370B shortly after starting the opencounter group, so my
immediate need got taken care of, but that doesn't mean we still
shouldn't build an open counter. )

An FPGA based solution sounds quite flexible and attractive. I have a
Diligent NEXSYS sitting on the bench next to the 5370b as a matter of
fact. I'm sure we could get all the speed needed out of an FPGA, but
the analog i/o might get to be the tough part. I don't know enough
however.

I think your email got eaten by the spam filter. I'll respond to that shortly.

Bob

On Sun, Jan 30, 2011 at 8:11 PM, Tijd Dingen <tijddingen at yahoo.com> wrote:
> On that note, does anyone know if this counter project is still active? Some
> time ago I asked about this, but never got a reply. Maybe the e-mail got
> eaten by a spam filter, or maybe I just didn't ask nice enough, I don't
> know. ;->
>
> If there is still an active project, I'd be interested. If not, I'll just
> keep doing my own fpga based counter thing.
>
> regards,
> Fred
>
>
>
>
> ----- Original Message ----
> From: Don Latham <djl at montana.com>
> To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
> Sent: Mon, January 31, 2011 1:51:45 AM
> Subject: Re: [time-nuts] counter
>
> They look interesting, Tristan. Gee, nobody's "in charge" of this, I'm not
> sure it's even a project at this point, and AFIK there's no out of turn
> :-). I too like the Arduino, in fact I've settled on them or the Propeller
> for projects if I can, so the boards you propose may work just fine.
> Don
>
> Tristan Steele
>> Hi Don,
>>
>> At the risk of speaking out of turn, and not knowing too much about this
>> project (I'm new here!) have you considered something like these boards:
>>
>>http://www.gadgetfactory.net/index.php?main_page=index&cPath=1&zenid=d282dce6c5b0acfe45c1377315b2734c
>>
>>c
>>
>> They use the Spartan 3E chips, like alot of low cost FPGA boards and also
>> they expose the JTAG headers.  I'm unsure of the license of the current
>> programming software but it is likely to be pretty hack-friendly as the
>> board designs themselves are released under creative commons.
>>
>> They are designed for use with the Arduino project and a soft core, though
>> this is certainly not required.  I've been looking at them as a nice, low
>> cost FPGA board that is pretty configurable.
>>
>> I have no affiliation with the site, other then being a prospective
>> customer.  I also haven't bought any of them yet, so I haven't actually
>> tested them
>>
>> Just my $0.02,
>>
>> Tristan
>>
>> On 30 January 2011 17:28, Don Latham <djl at montana.com> wrote:
>>
>>> With regard to the home-brew counter project, if it still exists:
>>>
>>> From friend Marcus Leech on another list:
>>>
>>> "Don't know whether you've seen these:
>>>
>>> http://www.knjn.com/ShopBoards_USB2.html
>>>
>>> $79.95 for the low-end board, which includes and FX2, and a small
>>> Cyclone FPGA.  Pretty good
>>>  value."
>>>
>>> Thanks, Marcus. this looks like the very thing, just need the "front
>>> end"
>>>
>>> Don
>>>
>>>
>>>
>>>
>>> --
>>> "Neither the voice of authority nor the weight of reason and argument
>>> are
>>> as significant as experiment, for thence comes quiet to the mind."
>>> R. Bacon
>>> "If you don't know what it is, don't poke it."
>>> Ghost in the Shell
>>>
>>>
>>> Dr. Don Latham AJ7LL
>>> Six Mile Systems LLP
>>> 17850 Six Mile Road
>>> POB 134
>>> Huson, MT, 59846
>>> VOX 406-626-4304
>>> www.lightningforensics.com
>>> www.sixmilesystems.com
>>>
>>>
>>> _______________________________________________
>>> time-nuts mailing list -- time-nuts at febo.com
>>> To unsubscribe, go to
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>>> and follow the instructions there.
>>>
>> _______________________________________________
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>> and follow the instructions there.
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>
>
> --
> "Neither the voice of authority nor the weight of reason and argument are
> as significant as experiment, for thence comes quiet to the mind."
> R. Bacon
> "If you don't know what it is, don't poke it."
> Ghost in the Shell
>
>
> Dr. Don Latham AJ7LL
> Six Mile Systems LLP
> 17850 Six Mile Road
> POB 134
> Huson, MT, 59846
> VOX 406-626-4304
> www.lightningforensics.com
> www.sixmilesystems.com
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>
>
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>

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