powerbudget of freerunner?

[joakim at verona.se]

Timo Juhani Lindfors <timo.lindfors at iki.fi> writes:

> joakim at verona.se writes:
>> I would like to calculate how large battery capacity I need to have all
>> the subsystems running(wifi, gps, gsm, bluetooth) + an external 3g
>> modem. I would like to have 24h continuous uptime without suspend. (if i
>> need a car battery to do it, so be it :)
>
> $ wget http://iki.fi/lindi/openmoko/energy2.txt$ cut -d' ' -f6 energy2.txt | sort -n | tail -n1
> 896437
>
> shows that the largest peak consumption I have ever hit is 900 mA
> (voltage is around 4.3 V).
>
> $ grep Discharging energy2.txt | cut -d' ' -f6 | grep "^[1-9]" > a
> $ gnuplot
> gnuplot> set terminal dumb
> gnuplot> plot "a"
>
>     900000 ++-----+-----+------+-----+------+------+-----+------+-----+-----A+
>            +      +     +      +     +      +      +     +      + "a" + A  AA+
>     800000 ++                                                              A++
>            |                                                               A |
>     700000 ++                                                              A++
>            |                                                               A |
>            |                                                               A |
>     600000 ++                                                              A++
>            |                                                               A |
>     500000 ++                                                              A++
>            |                                                              AA |
>     400000 ++                                                            AA ++
>            |                                                          AAAA   |
>     300000 ++                                                    AAAAAA     ++
>            |                                                  AAAA           |
>            |                                           AAAAAAAA              |
>     200000 ++                                     AAAAAA                    ++
>            |                         AAAAAAAAAAAAAA                          |
>     100000 ++       AAAAAAAAAAAAAAAAAA                                      ++
>            +     AAAA   +      +     +      +      +     +      +     +      +
>          0 AAAAAAA+-----+------+-----+------+------+-----+------+-----+-----++
>            0     500   1000   1500  2000   2500   3000  3500   4000  4500  5000
>
>
> shows that the normal consumption in my use is around 300 mA.

Fantastic answer, thanks!

-- 
Joakim Verona