[time-nuts] Arduinos in time and near space

[Lizeth Norman]

Chris,
Thanks for the info on the launchpad. Believe it or not, the problem isn't
power drain, it's keeping the electronics (most importantly the batteries)
at operating temperature when the outside air temperature is -30F or lower.
A thought was to use electric socks or handwarmers and modulate the heat.
One of the last balloons got launched and had great telemetry received. The
team watched as it froze and failed. End of mission.
Norm


On Mon, Jan 20, 2014 at 1:31 AM, Chris Albertson
<albertson.chris at gmail.com>wrote:

> On Sun, Jan 19, 2014 at 6:41 PM, Lizeth Norman <normanlizeth at gmail.com
> >wrote:
>
> >
> > Is it possible to write (assuming the poor little creature would do it) a
> > piece of code, that given your lat/long, the time and a two line element
> > set for an orbiting object, such as the ISS, that would give you the
> > acquisition of signal time/loss of signal time and so forth?
>
>
> The term "Arduino" now covers a very wis range of computers at are all
> programmed using the same easy to learn system.  You can use the "uno" whig
> is the standard 16Mhz AVR CPU or now you can swap in a "due" with is a much
> faster processor.
>
> But I doubt you would need a lot of CPU power as you are not re-computing
> this at a fast rate.  The "Slow" AVR chip executes 16 million instructions
> per second.  More than enough for what you want.
>
> But I think yout would be more concerned with power.  There are far better
> chips that are just as easy to use.   I'd look at TI's MSP430.   It is
> failly powerful and can power down to run in just micro amps (yes uA, not
> mA)  TI sells them on a development board just like the Arduino for $10
> shipped.  That is 1/3rd the price of an official made in Italy Arduno.  The
> MSP430 LauchPad from TI can be programmed with the sme software environment
> as Arduino.     Another advantage is that in TI's board after you program
> the prototype the chip is socketed and you can pull it out and run the bare
> chip
>
> See photo in link below.  There are some jumpers you cn pull then the chip
> is electrically isolated from everything but power, you check it out that
> way than pull the chip from the socket if yu like.
> http://www.ti.com/ww/en/launchpad/launchpads-msp430-msp-exp430g2.html#tabs
>
> Use this to program the above MSP430.  If you know the Arduino then there
> is zero learning curve.
> http://www.energia.nu
>
> It will run a long time on AAA batteries.
>
>
>
> --
>
>
> Chris Albertson
> Redondo Beach, California
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