[time-nuts] Arduinos in time and near space

[Chris Albertson]

On Mon, Jan 20, 2014 at 6:54 AM, Jim Lux <jimlux at earthlink.net> wrote:

> On 1/19/14 10:31 PM, Chris Albertson wrote:
>
>> On Sun, Jan 19, 2014 at 6:41 PM, Lizeth Norman <normanlizeth at gmail.com
>> >wrote:
>>
>>
> This is why I am a fan of the Teensy3... It's a Freescale micro based on
> ARM cortex, and fast, low power, etc.
>
> However, I happened to have an Arduino sitting in front of me on the table
> on Saturday when this started.
>
> The computer you've got is better than the one you have to order and wait
> for.


Yes today use what you have but if this really is going up in battery
powered payload you'd buy the part that works best.  I'm using what I have
now but I see it is not going to b the longer term solution.  Your Teensy
looks good.

Thanks for the pointer to "teensy3"  I did not know they were using ARM.
I'm going to look into this because I'm
adding a Kalman filter in a project that is now Arduino based It's working
out to be a 12x12 matrix.   I'm not at all sure the little AVR chip and do
floating point math fastest enough to run a Kalman filter that large inside
a even a slow 1Hz control loop.

I was thinking I Wanted  Beagle Board Black.  But if the navigation Kalman
filter and motor control PID loop fit on a Teensy I've by better off.
 Eventually I need something that can run a real-time version of Linux.

Back on topic:  Arduino contributed code includes a Time library that can
input time using NTP over Ethernet and from the German version of WWVB as
well as a few other methods of time transfer.  So there appears no need to
re-invent time transfer into an Arduino.

>
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-- 

Chris Albertson
Redondo Beach, California