[time-nuts] IRIG-B with Arduino

Bruce Lane kyrrin at bluefeathertech.com
Thu Dec 16 02:24:51 UTC 2010


	That's the thing. I don't want to have to rely on PC hardware. I really want to make something which is stand-alone, and can be wired to a variety of displays.

	Keep the peace(es).

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On 14-Dec-10 at 22:59 Chris Albertson wrote:

>If the goal is to learn about AVRs that is a good project.  But if you
>want a cheap IRIG decoder I bet you already have one.  An IRIG driver
>is included with NTP.  The NTP driver reads the time code from an
>audio interface set for 8Khz sample rate.    If you are writing a
>decoder it might be good to study the NTP source code.  They do good
>bit of error checking and averaging and get to microsecond level even
>on noisy signals.  But then it runs on an "full size" 32 or 64 bit
>computer  There is also an irig time code generator  in the source
>.tar file but it is not compiled by the Makefile, yu have to do that
>by hand.  No the IRIG driver is compiled by default
>
>On Tue, Dec 14, 2010 at 10:19 PM, Bruce Lane <kyrrin at bluefeathertech.com>
>wrote:
>> Fellow clock-tickers,
>>
>>        I'm finally starting to learn microcontrollers, and have selected
>Atmel's AVR line as my tool of choice. I've also discovered the Arduino
>site, and am starting to learn their IDE as well.
>>
>>        My first goal will be an open-source/open-hardware IRIG-B decoder
>(takes IRIG-B 1kHz stream, sends the timecode to an LCD panel). I've
>noticed a distinct lack of hobby-priced decoders on the market, and I
>intend to try and remedy that.
>>
>>        My initial development platform will be the Arduino Mega-2560
>board. However, that particular microcontroller is unlikely to be my final
>chip of choice due to the fact it's not available in a hobbyist-friendly
>DIP package. If others with more development skill have suggestions for a
>different chip, I will gladly listen.
>>
>>        Stay tuned for further developments (no pun intended). I expect
>this to take at least a few months, as the learning curve looks kind of
>steep.
>>
>>
>> -=-=-=-=-=-=-=-=-=-=-=-
>> Bruce Lane, Owner & Head Hardware Heavy,
>> Blue Feather Technologies -- http://www.bluefeathertech.com
>> kyrrin (at) bluefeathertech do/t c=o=m
>> "Quid Malmborg in Plano..."
>>
>>
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>
>
>
>-- 
>=====
>Chris Albertson
>Redondo Beach, California
>
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-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner & Head Hardware Heavy,
Blue Feather Technologies -- http://www.bluefeathertech.com
kyrrin (at) bluefeathertech do/t c=o=m
"Quid Malmborg in Plano..."




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