[McHUG] Chart with spaces

[Peter Morton]

Rich-

To carry your simulation to the next level!!!

LTSpice should allow you to run the simulation at different temperatures. 
The voltage across the diode has a 2 mV per deg. C. negative temperature 
coefficient.  This will affect the voltage measurement accuracy a bit as the 
balloon rises and the electronics cool.  The temperature sensor is outside 
and the 1N914 is inside the insulated package (the styrofoam cup) so there 
will be a longer thermal time lag time at the 1N914.

Something else to mull over is that the PicAxe is only rated to 3V, so, does 
anyone know how well the ADC in the PicAxe behaves below 3V?

But, I'm sure you'll have enough information with what you have to know when 
the voltage is marginal.

I'm just another engineer throwing darts!!  Good luck.

I just bought a Yaesu FT-897 (eBay) Transceiver that has all-modes from 1.8 
through 450 MHz.  So, I'm looking forward to the next launch so I can copy 
your data on a laptop while mobile.  I suppose an antenna like your 
hand-held yagi mounted on a tripod would be neat to have, also.

I wish the GPS modules were a bit cheaper.  Futurlec has them for less that 
$40.  Too expensive to risk losing on a balloon flight per my pocketbook.

-Pete, W3GVX

----- Original Message ----- 
From: "Rich Mitchell" <geobra at att.net>
To: "McHUG Reflector" <mchug at mailman.qth.net>
Sent: Wednesday, December 23, 2009 11:57 AM
Subject: [McHUG] Chart with spaces


> This may read better:
>
> Voltage     R2 Vdev      R2 %       D1 Vdev        D1 %
> 5              1.59864       31.97%    0.547757      10.96%
> 4              1.27891       31.97%    0.536324      13.41%
> 3              0.959184     31.97%    0.521111      17.37%
> 2              0.639456     31.97%    0.49834        24.92%
> 1              0.319728     31.97%    0.45256        45.26%
>
> --
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