[time-nuts] FE-5680A Mechanical Question

Don Latham djl at montana.com
Fri Jan 13 16:40:50 EST 2012


Hi Bert: The point to the picaxe is that you can do your own
programming; the learning curve is very shallow, there is a really good
manual, and the investment is really very small. There is a very large
user community, too. Investigate at: http://www.picaxe.com/
The picaxe started out in England for high schoolers.
Completely OT, it seems to me that most of the good small hobby-style
stuff has come from Australia and England, rather than the US. Kinda
tracks the death of the space program, and thousands of wimpy apps for
some overpriced piece of hardware. . .
Wait one minute for responses until I get the pot to cover my head :-)
Don


EWKehren at aol.com
> Can you do the programming?
> Bert Kehren
>
>
> In a message dated 1/13/2012 3:56:47 P.M. Eastern Standard Time,
> djl at montana.com writes:
>
> I would  just use a picaxe, has a simple to use IDE and several
> different
> sizes. No  need for assembly, cheap enough for quasi-production.
> Don
>
> Chris  Albertson
>> On Fri, Jan 13, 2012 at 3:19 AM,   <EWKehren at aol.com> wrote:
>>> What we know is that you can set  the Rb in 7 E-13. Dithering would
>>> allow
>>> even closer  setting, the question is what rate will the Rb accept
>>> with
>>>  out
>>> loosing lock or deterioration of the performance. Some one  should
>>> explore
>>> that.  I am still waiting to se  some aging. Taking the 10 MHz output
>>> and than
>>> use an  analog loop and something like a Morion OCXO and you have
>>> the
>>> best of
>>> all.
>>> Digitally controlling the  Rb will cut the cost of the control loop
>>> in
>>> half.
>>>  For $10 in parts and a PC board for less than $10 using Shera  like
>>> controller  can be realized. What is needed is some one  able to do
>>> the
>>> PIC.
>>> If some one is interested and  able, please contact me off list. A
>>> low
>>> cost
>>> GPS or a  1 pps output of a Tbolt be perfect source.
>>> Bert  Kehren
>>
>> Don't use a PIC for the prototype.  A desktop PC  could work as well
>> and everyone here already has one.    Connect the FE5680 to the PC's
>> serial port and send commands to adjust  it.  The PC also needs to be
>> able to read a voltage.    Many already have audio input with 24-bit
>> ADC chips.
>>
>>  Later you can move the C code from the PC pretty much directly to an
>>  AVR.  PICs typically use assembly language, that is harder and
>> limits
>> the number of people who can contribute changes to the  code.  But you
>> can start with a PC, maybe running Linux or  BSD.
>> Chris Albertson
>> Redondo Beach, California
>>
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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
>
>
>
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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






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