[time-nuts] IRIG-B with Arduino

Eric Garner garnere at gmail.com
Wed Dec 15 21:44:48 EST 2010

You may want to avoid the 328p. for the last year there have been supply problems to the distributors. 


Sent from my Banana jr (tm) Mobile Device

On Dec 15, 2010, at 6:23 PM, "Bruce Lane" <kyrrin at bluefeathertech.com> wrote:

>    In fact, I was looking very hard at the 328P. AND I just happen to have an STK500 on the way from the east coast (thanks to an Ebay purchase).
>    Already got AVR Studio installed, and I also have IAR's AVR package standing by. In short, I've got plenty to learn with.
>    And you're right. I'll be learning both C and AVR assembler as I go along, but the way I learn best is to actually DO something with programming rather than just taking abstract example problems.
>    Banzai! ;-)
> *********** REPLY SEPARATOR  ***********
> On 14-Dec-10 at 22:37 John Miles 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.
>> That's a good family of parts to start out with.  It is very well supported
>> and easy to work with.  You don't really need to mess with the Arduino IDE
>> and all the trimmings -- just set up AVR-GCC with WinAVR or one of the
>> newer
>> distributions and go from there.  If you have ever done any C programming
>> before, the learning curve will be measured in hours or days, not months.
>> If you haven't, well... there's always assembly.
>> There is a new low-cost kit with Arduino-like USB programming capability on
>> the market:
>> http://www.seeedstudio.com/depot/usnoobie-kit-p-708.html?cPath=104_128
>> The first batch of these shipped with broken bootloader code so you have to
>> have an STK-500 or similar programmer to get them up and running.  I
>> imagine
>> that's been fixed by now, but at any rate, the Atmega328P is probably the
>> chip you want, if you want a higher-end AVR controller that still comes in
>> a
>> DIP.
>> I just rigged one of them up to drive a YIG synthesizer:
>> http://www.thegleam.com/ke5fx/stellex.htm (see December 2010 update at the
>> very bottom of the page).  Apart from the USB bootloader confusion and the
>> presence of a couple of spurious error/warning messages in the avrdude.exe
>> programmer utility, I'd give it two thumbs up at a minimum.  Great little
>> device.
>> -- john, KE5FX
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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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